TWI698783B - Touch unit and touch display panel - Google Patents

Abstract

A touch unit and a touch display panel are provided. The touch unit includes a touch electrode, a switching element, a touch signal line, a first control signal line, an anti-interference element, a common signal line, and a second control signal line. The switching element is electrically connected with the touch electrode. The touch signal line is electrically connected with the switching element. The first control signal line is electrically connected with the switching element. The anti-interference element is electrically connected with the touch electrode. The common signal line is electrically connected with the anti-interference element. The second control signal line is electrically connected with the anti-interference element.

Description

Touch unit and touch display panel

The present invention relates to a touch unit, and more particularly to a touch unit including a switch element and an anti-interference element, and a touch display panel including a plurality of touch units.

With the development of technology, the appearance rate of touch display panels on the market is gradually increasing, and various related technologies are also emerging in endlessly. Generally speaking, the touch display panel contains many touch electrodes corresponding to different touch positions. The chip can calculate which touch electrode in the touch display panel the current position of an external object (such as a finger) corresponds to. In order to meet market demand, the size of touch display panels has increased year by year, and the number of touch electrodes and chips required to be provided in the touch display panel has also increased. Due to the high cost of the chip, the manufacturing cost of a large-size touch display panel remains high, and it is difficult to reduce the area for the peripheral area of the chip.

The present invention provides a touch unit, which can reduce the number of chips used for calculating the touch position.

The present invention provides a touch display panel, which can reduce the number of chips used for calculating touch positions.

In an embodiment of the present invention, the touch unit includes touch electrodes, switch elements, touch signal lines, first control signal lines, anti-interference elements, common signal lines, and second control signal lines. The switch element is electrically connected to the touch electrode. The touch signal line is electrically connected to the switch element. The first control signal line is electrically connected to the switch element. The anti-interference component is electrically connected to the touch electrode. The common signal line is electrically connected to anti-interference components. The second control signal line is electrically connected to the anti-interference component.

In an embodiment of the present invention, a touch display panel includes a substrate, a pixel array, a first touch group to a Pth touch group. The pixel array is located on the substrate. The first touch group to the Pth touch group are located on the substrate. The first touch group to the Pth touch group are arranged in P rows in sequence, where P is a positive integer. Each of the first touch group to the Pth touch group includes a plurality of touch units. Each touch unit includes a touch electrode, a switch element, a touch signal line, a first control signal line, an anti-interference element, a common signal line, and a second control signal line. The switch element is electrically connected to the touch electrode. The touch signal line is electrically connected to the switch element. The first control signal line is electrically connected to the switch element. The anti-interference component is electrically connected to the touch electrode. The common signal line is electrically connected to anti-interference components. The second control signal line is electrically connected to the anti-interference component. The touch units in the same row correspond to the same first control signal line. The touch units in the same row correspond to the same second control signal line.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1A is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 1B is a schematic top view of a touch display panel according to an embodiment of the invention. 1A omits the pixel array of the touch display panel, FIG. 1B is a partial enlarged view of the touch display panel, and the position of FIG. 1B corresponds to one of the touch units of the touch display panel of FIG. 1A.

1A and 1B, the touch display panel 10 includes a substrate 100, a pixel array 110, a first touch group 1201 to a P-th touch group 120P, where P is a positive integer. In this embodiment, the touch display panel 10 further includes a chip 130.

The substrate has a display area AA and a peripheral area BA located on at least one side of the display area. The pixel array 110 is located on the display area AA of the substrate 100. The pixel array 110 includes a plurality of scan lines SL, a plurality of data lines DL, a plurality of active devices T, and a plurality of pixel electrodes PE. A plurality of scan lines SL, a plurality of data lines DL, a plurality of active devices T, and a plurality of pixel electrodes PE are located on the display area AA of the substrate 100. The active devices T are electrically connected to the scan lines SL and the data lines DL. The pixel electrodes PE are electrically connected to the active devices T.

The first touch group 1201 to the P-th touch group 120P are located on the substrate 100. Although in this embodiment, the first touch group 1201 to the P-th touch group 120P are located on the display area AA, the invention is not limited to this. In other embodiments, the first touch group 1201 to the Pth touch group 120P are partially located on the peripheral area BA. The first touch group 1201 to the P-th touch group 120P overlap the pixel array 110. The first touch group 1201 to the P-th touch group 120P are arranged in P rows in sequence.

Each of the first touch group 1201 to the P-th touch group 120P includes a plurality of touch units 122 respectively. Each touch unit 122 includes a touch electrode E located in the display area AA, a switch element A1, a touch signal line TL, a first control signal line GL1, an anti-interference element A2, a common signal line CL, and a second control signal line GL2. The touch unit 122 overlaps the pixel array 110. The touch electrode E overlaps a plurality of pixel electrodes PE.

The switch element A1 is electrically connected to the touch electrode E. The touch signal line TL is electrically connected to the switching element A1. The first control signal line GL1 is electrically connected to the switching element A1.

The touch units 122 in the same row correspond to the same first control signal line GL1. In this embodiment, each touch unit 122 includes a plurality of switch elements A1, and the switch elements A1 of the same touch unit 122 correspond to the same touch signal line TL and the same first control signal line GL1. Thereby, the signal transmitted from the touch signal line TL to the touch electrode E is less likely to be attenuated by the impedance of the switching element A1. By connecting a plurality of switching elements A1 in parallel, the size of a single switching element A1 can be reduced.

In this embodiment, the first touch group 1201 to the P-th touch group 120P respectively include more than two rows of touch units 122, and the first control signal lines GL1 of the touch units 122 in more than two rows are electrically connected to each other. Sexual connection. In other words, the switch elements A1 in the same touch group are controlled by the same control signal.

The switch elements A1 of the touch units 122 located in adjacent rows are electrically connected to different touch signal lines TL, respectively. In other words, the touch signals of the touch units 122 located in adjacent rows are transmitted through different touch signal lines TL. The switch elements A1 of the touch units 122 located in different rows are electrically connected to different touch signal lines TL, respectively.

The same touch signal line TL corresponds to more than two of the first touch group 1201 to the P-th touch group 120P. In this embodiment, the first touch group 1201 to the P-th touch group 120P respectively include two columns of touch units 122. In the same row of touch units 122, the switches of the touch unit 122 in the odd-numbered column The element A1 is electrically connected to one of the touch signal lines TL, and the switch element A1 of the touch unit 122 located in the even-numbered column is electrically connected to the other touch signal line TL.

The anti-interference component A2 is electrically connected to the touch electrode E. The common signal line CL is electrically connected to the anti-interference component A2. The second control signal line GL2 is electrically connected to the anti-interference component A2. In this embodiment, the common signal lines CL of the plurality of touch units 122 are electrically connected to each other.

The touch units 122 located in the same row correspond to the same second control signal line GL2. In this embodiment, each touch unit 122 includes a plurality of anti-interference components A2, and the anti-interference component A2 of the same touch unit 122 is electrically connected to the same common signal line CL and the same second control signal line GL2. In this way, the signal transmitted from the common signal line CL to the touch electrode E is less likely to be attenuated by the impedance of the anti-interference component A2. By connecting multiple anti-interference components A2 in parallel, the size of a single anti-interference component A2 can be reduced.

In this embodiment, the first touch group 1201 to the P-th touch group 120P respectively include more than two rows of touch units 122, and the second control signal lines GL2 of the touch units 122 in more than two rows are electrically connected to each other. Sexual connection. In other words, the anti-interference components A2 in the same touch group are controlled by the same control signal.

The wafer 130 is located on the peripheral area BA of the substrate 100. The first control signal line GL1, the second control signal line GL2, the common signal line CL, and the touch signal line TL are electrically connected to the chip 130. Although in this embodiment, the touch display panel 10 includes a chip 130 as an example, the invention is not limited to this. The number of chips 130 can be changed according to actual needs.

Based on the above, the same touch signal line TL of the touch display panel 10 of the present embodiment can be electrically connected to the touch electrodes of more than two touch units. Therefore, the chip 130 used to provide the touch signal is led The number of pins can be reduced, and it can also be said that the number of required chips 130 can be reduced. Since the number of chips 130 can be reduced, the area of the peripheral area BA of the touch display panel 10 can be reduced, and the manufacturing cost of the touch display panel 10 can be reduced.

2 is a schematic diagram of a control signal of a touch display panel according to an embodiment of the invention. For example, FIG. 2 is a schematic diagram of control signals on the first control signal line GL1 and the second control signal line GL2 of the touch display panel in FIGS. 1A and 1B.

When the signal Von is applied to the first control signal line GL1, the touch signal on the corresponding touch signal line TL will pass through the corresponding switch element A1 and be transmitted to the corresponding touch electrode E. At this time, the corresponding touch electrode E has a touch sensing function. Conversely, when the signal Voff is applied to the first control signal line GL1 (or when no signal is applied to the first control signal line GL1), the touch signal on the corresponding touch signal line TL will be difficult to pass through the corresponding switch element A1.

When the signal Von is applied to the second control signal line GL2, the common signal (or common voltage) on the common signal line CL will pass through the corresponding anti-interference component A2 and be transmitted to the corresponding touch electrode E. At this time, the corresponding touch electrode E can be used together with the pixel electrode in the touch display panel to control the turning of the liquid crystal. Conversely, when the signal Voff is applied to the second control signal line GL2 (or when the signal is not applied to the second control signal line GL2), the common communication signal on the common signal line CL will be difficult to pass through the corresponding anti-interference component A2. By the arrangement of the common signal line CL and the anti-interference component A2, the resistive capacitive load (RC loading) of the touch display panel can be lower, and the problem of loss of the common signal in the transmission process can be improved.

1A and FIG. 2, the touch display panel includes a first touch group 1201 to a P-th touch group 120P.

For the convenience of description, FIG. 2 only takes the control signals on the first to fourth touch groups as an example. The control signal M1 is applied to the first control signal line GL1 corresponding to the first touch group 1201, and the control signal G1 is applied to the second control signal line GL2 corresponding to the first touch group 1201. A control signal M2 is applied to the first control signal line corresponding to the second touch group (not shown in FIG. 1A), and a control signal is applied to the second control signal line corresponding to the second touch group (not shown in FIG. 1A) G2. A control signal M3 is applied to the first control signal line corresponding to the third touch group (not shown in FIG. 1A), and a control signal is applied to the second control signal line corresponding to the third touch group (not shown in FIG. 1A) G3. A control signal M4 is applied to the first control signal line corresponding to the fourth touch group (not shown in Figure 1A), and a control signal is applied to the second control signal line corresponding to the fourth touch group (not shown in Figure 1A) G4.

The touch display panel will switch to liquid crystal display mode LCD or touch sensing mode TP over time. When the touch display panel is in the liquid crystal display mode LCD, a common signal used to control the rotation of the liquid crystal is applied to the touch electrodes. When the touch display panel is in the touch sensing mode TP, a touch signal is applied to at least one touch electrode, and a common signal for controlling the rotation of the liquid crystal is applied to the other touch electrodes.

In this embodiment, each time the touch sensing mode TP is switched, touch signals are sequentially applied to the touch electrodes of two different touch groups. For example, when switching to the touch sensing mode TP for the first time, the control signal M1 and the control signal M2 are switched to Von in sequence, and the control signal G1 and the control signal G2 are switched to Voff in sequence at the same time. The touch signal is transmitted to the touch electrodes of the first touch group and the touch electrodes of the second touch group. When switching to the touch sensing mode TP for the second time, sequentially switch the control signal M3 and the control signal M4 to Von, and at the same time switch the control signal G3 and the control signal G4 to Voff in sequence, thereby enabling the touch signal in sequence Transfer to the touch electrodes of the third touch group and the touch electrodes of the fourth touch group. The operation methods of other touch groups can be deduced in the same way. After the touch electrodes of all touch groups (the first touch group to the Pth touch group) have been scanned by the touch signal, the first touch The control group starts to scan again.

Although in this embodiment, each time the touch sensing mode TP is switched, touch signals are sequentially applied to the touch electrodes of two different touch groups, but the invention is not limited to this. In other embodiments, each time the touch sensing mode TP is switched, touch signals are applied to the touch electrodes of one or more than three touch groups.

3 is a schematic diagram of a control signal of a touch display panel according to an embodiment of the invention. For example, FIG. 3 is a schematic diagram of the control signals on the first control signal line GL1 and the second control signal line GL2 of the touch display panel of FIGS. 1A and 1B.

FIG. 3 and FIG. 2 respectively represent different operation modes of the touch display panel, and the similar parts of FIG. 3 and FIG. 2 can be referred to the foregoing description, and will not be repeated here.

The main difference between the operation method of FIG. 3 and the operation method of FIG. 2 is that: in the embodiment of FIG. 3, in the liquid crystal display mode LCD, the common signal on the touch electrode is transmitted by the touch signal line. In other words, in the embodiment of FIG. 3, in the liquid crystal display mode LCD, the control signals (such as M1~M4) on the first control signal line of all touch groups are switched to Von, so that the control signal on the touch signal line The common communication number can be transmitted to the touch electrode E through the switch element.

In the touch sensing mode TP, the signal transmitted by the touch signal line is switched to the touch signal, and the common communication signal is transmitted through the common signal line. Therefore, in the touch sensing mode TP, except for the control signal on the first control signal line of the scanning touch group being switched to Von, the control signal on the first control signal line of the other touch groups is switched to Voff, And switch the control signal on the second control signal line of the other touch group to Von, so that the touch signal can pass through the switch element of the corresponding touch group and be transmitted to the corresponding touch electrode E, and the common communication signal passes through The anti-interference components of other touch groups are transmitted to the touch electrodes.

In this embodiment, each time the touch sensing mode TP is switched, touch signals are sequentially applied to the touch electrodes of two different touch groups. For example, when switching to the touch sensing mode TP for the first time, the control signal M1 remains at Von, but the signal transmitted by the touch signal line TL corresponding to the first touch group is converted from a common signal into a touch signal. When the touch signal is transmitted to the first touch group, the control signal (such as M2~M4) on the first control signal line corresponding to the other touch groups is switched to Voff, and the other touch groups correspond to the first control signal 2. The control signal (such as G2~G4) on the control signal line is switched to Von, so that the common signal can be transmitted to other touch groups through the shared signal line.

Then the control signal M1 is switched to Voff, and the control signal G1 is switched to Von, so that the common communication signal is transmitted to the touch electrodes of the first touch group through the common signal line CL. At the same time, the control signal M2 is switched to Von and the control signal G2 is switched to Voff, so that the touch signal is transmitted to the touch electrodes of the second touch group. The operation methods of other touch groups can be deduced in the same way. After the touch electrodes of all touch groups (the first touch group to the Pth touch group) have been scanned by the touch signal, the first touch The control group starts to scan again.

4 is a schematic top view of a touch display panel according to an embodiment of the invention. It must be noted here that the embodiment of FIG. 4 uses the element numbers and part of the content of the embodiment of FIGS. 1A and 1B, wherein the same or similar reference numbers are used to represent the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted parts, please refer to the foregoing embodiment, which is not repeated here.

The main difference between the touch display panel 20 of FIG. 4 and the touch display panel 10 of FIG. 1A is that: in the touch display panel 20 of FIG. 4, the first touch group to the Pth touch group each include q columns For touch units within, q is a positive integer greater than or equal to 1.

FIG. 4 takes one row of touch units 122 in the first touch group as an example. The first touch group includes q columns of touch units 122. In other words, each row of touch units 122 in the first touch group includes q touch units 122, which are respectively the first touch unit 1221 to the qth touch unit 122q in sequence. In the first touch group, each touch unit 122 is electrically connected to a corresponding touch signal line TL. For example, the first touch unit 1221 to the qth touch unit 122q are electrically connected to the first touch signal line TL1 to the qth touch signal line TLq, respectively. In other words, each row of touch units 122 in the first touch group includes q touch signal lines TL.

In this embodiment, the first touch signal line TL1 to the qth touch signal line TLq substantially span the first touch group to the Pth touch group. For example, each row of touch units 122 in the second touch group also includes the first touch unit 1221 to the qth touch unit 122q, and the first touch signal line TL1 to the qth touch signal line TLq except The first touch unit 1221 to the qth touch unit 122q of the first touch group are respectively electrically connected, and the first touch unit 1221 to the qth touch unit 122q of the second touch group are also electrically connected respectively .

However, not every row of touch units 122 in each of the first touch group to the Pth touch group includes q columns of touch units 122. For example, each row of touch units 122 in the P-th touch group includes first touch units 1221 to q-1 touch units 122q-1, and first touch signal lines TL1 to q-1 touch units The signal line TLq-1 is electrically connected to the first touch unit 1221 to the q-1 touch unit 122q-1 of the P-th touch group, and the q-th touch signal line TLq is not connected to the P-th touch group Any touch unit 122 connected. In other words, the number of touch units 122 in each row of each of the first touch group 1201 to the P-th touch group 120P is less than or equal to q.

In this embodiment, the first touch group 1201 to the P-th touch group 120P respectively have n rows of touch units 122, where n is a positive integer. In other words, the touch display panel 20 includes n times q touch signal lines TL in total.

Based on the above, the same touch signal line TL of the touch display panel 20 of the present embodiment can be electrically connected to more than two touch electrodes. Therefore, the number of pins of the chip for providing touch signals can be reduced. It can also be said that the number of required chips can be reduced. Since the number of chips can be reduced, the area of the peripheral area of the touch display panel can be reduced, and the manufacturing cost of the touch display panel 20 can be reduced.

FIG. 5 is a schematic top view of a touch display panel according to an embodiment of the invention. It must be noted here that the embodiment of FIG. 5 uses the element numbers and part of the content of the embodiment of FIGS. 1A and 1B, wherein the same or similar reference numbers are used to represent the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted parts, please refer to the foregoing embodiment, which is not repeated here.

The main difference between the touch display panel 30 of FIG. 5 and the touch display panel 10 of FIG. 1 is that part of the common signal line CL1 of the touch display panel 30 is electrically connected to the first test pad P1, and another part of the common signal line is connected to the first test pad P1. CL2 is electrically connected to the second test pad P2.

Please refer to FIG. 5, the first test pad P1 and the second test pad P2 are located on the peripheral area BA of the substrate 100. The first test pad P1 is electrically connected to the common signal line CL1 of part of the touch unit 122. The second test pad P2 is electrically connected to the common signal line CL2 of another part of the touch unit 122. A part of the touch unit 122 electrically connected to the first test pad P1 and another part of the touch unit 122 electrically connected to the second test pad P2 are alternately arranged. Therefore, it is possible to detect whether adjacent touch units 122 are short-circuited with each other by displaying the screen or measuring the impedance. In some embodiments, after the test is completed, all the common signal lines CL can be connected to each other, for example, by laser welding the common signal line CL1 and the common signal line CL2, but the invention is not limited to this.

Although in this embodiment, the touch unit 122 is divided into two groups for testing, the invention is not limited to this. In other embodiments, the touch unit 122 is divided into three or more groups for testing.

FIG. 6 is a schematic top view of a touch display panel according to an embodiment of the invention. It must be noted here that the embodiment of FIG. 6 uses the element numbers and part of the content of the embodiment of FIGS. 1A and 1B, wherein the same or similar reference numbers are used to represent the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted parts, please refer to the foregoing embodiment, which is not repeated here.

The main difference between the touch display panel 40 of FIG. 6 and the touch display panel 10 of FIG. 1 is that the touch display panel 40 further includes a driving circuit SR.

The driving circuit SR is located on the peripheral area BA of the substrate 100. The driving circuit SR is electrically connected to the chip 130. The first control signal line GL1 and the second control signal line GL2 are electrically connected to the driving circuit SR. The driving circuit SR is, for example, a gate driving circuit on the array (Gate On Array, GOA).

With the setting of the driving circuit SR, the number of pins of the chip 130 can be further reduced. Therefore, the manufacturing cost of the touch display panel 40 can be reduced.

FIG. 7A is a schematic top view of a touch display panel according to an embodiment of the invention. Fig. 7B is a schematic cross-sectional view taken along line aa' of Fig. 7A. Fig. 7C is a schematic cross-sectional view taken along line bb' of Fig. 7A. It must be noted here that the embodiments of FIGS. 7A, 7B, and 7C follow the element numbers and part of the content of the embodiments of FIGS. 1A and 1B, wherein the same or similar numbers are used to represent the same or similar elements, and The description of the same technical content is omitted. For the description of the omitted parts, please refer to the foregoing embodiment, which is not repeated here.

Referring to FIGS. 7A, 7B and 7C, the light shielding layer SM1 and the light shielding layer SM2 are located on the substrate 100. The first buffer layer B1 and the second buffer layer B2 are sequentially stacked on the light shielding layer SM1 and the light shielding layer SM2. The materials of the first buffer layer B1 and the second buffer layer B2 are, for example, silicon nitride and silicon oxide, respectively. The channel layer CH1 and the channel layer CH2 are located on the second buffer layer B2. The channel layer CH1 and the channel layer CH2 have a single-layer or multi-layer structure. The materials include amorphous silicon, polycrystalline silicon, microcrystalline silicon, single crystal silicon, organic semiconductor materials, Oxide semiconductor materials (for example: indium zinc oxide, indium gallium zinc oxide, or other suitable materials or a combination of the above), or other suitable materials, or containing dopants in the above materials or above的组合。 The combination. The first gate insulating layer GI1 and the second gate insulating layer GI2 are sequentially stacked on the channel layer CH1 and the channel layer CH2. The materials of the first gate insulating layer GI1 and the second gate insulating layer GI2 are, for example, silicon oxide and silicon nitride, respectively. The gate GA1 and the gate GA2 are located on the second gate insulating layer GI2, and overlap the channel layer CH1 and the channel layer CH2, respectively. The gate electrode GA1 and the gate electrode GA2 are electrically connected to the scan line SL and the control signal line GL (for example, the first control signal line GL1 or the second control signal line GL2 in the foregoing embodiment). The gate electrode GA1, the gate electrode GA2, the scan line SL, the first control signal line GL1 and the second control signal line GL2 belong to the same film layer. The insulating layer I1 and the insulating layer I2 are sequentially stacked on the gate electrode GA1 and the gate electrode GA2. The materials of the insulating layer I1 and the insulating layer I2 include silicon oxide and silicon nitride, respectively. The source S1 and the drain D1 are located on the insulating layer I2, and are electrically connected to the channel layer CH1 through the openings H1 and H2, respectively. The openings H1 and H2, for example, penetrate the first gate insulating layer GI1, the second gate insulating layer GI2, and the insulating layer I1. With insulating layer I2. The source S1 is electrically connected to the data line DL. The source S2 and the drain D2 are located on the insulating layer I2, and are respectively electrically connected to the channel layer CH2 through openings H3 and H4. The openings H3 and H4, for example, penetrate the first gate insulating layer GI1, the second gate insulating layer GI2, and the insulating layer I1. With insulating layer I2. The source electrode S2 is electrically connected to the signal line L (for example, the touch signal line TL or the common signal line CL in the foregoing embodiment). The touch signal line TL, the common signal line CL, the data line DL, the source S1, the source S2, the drain D1, and the drain D2 belong to the same film layer.

The gate electrode GA1, the gate electrode GA2, the source electrode S1, the source electrode S2, the drain electrode D1, and the drain electrode D2 are, for example, a single-layer or multi-layer structure, and the materials include, for example, chromium, gold, silver, copper, tin, lead, hafnium, tungsten, Molybdenum, neodymium, titanium, tantalum, aluminum, zinc and other metals, alloys of the foregoing metals, oxides of the foregoing metals, nitrides of the foregoing metals, combinations of the foregoing materials, or other conductive materials.

In this embodiment, the active device T of the pixel array 110 includes a channel layer CH1, a gate GA1, a source S1, and a drain D1. The thin film transistor A (such as the switching element A1 or the anti-interference element A2 of the foregoing embodiment) includes a channel layer CH2, a gate electrode GA2, a source electrode S2, and a drain electrode D2. Although in this embodiment, the active device T and the thin film transistor A are taken as an example of a top gate type thin film transistor, the present invention is not limited to this. In other embodiments, the active device T and the switching device A are bottom gate type thin film transistors.

The flat layer PL is located on the source S1, the source S2, the drain D1, and the drain D2. The touch electrode E is located on the flat layer PL and is electrically connected to the drain electrode D2 through the opening O3, which penetrates the flat layer PL, for example. The insulating layer BP is located on the touch electrode E. The pixel electrode PE is located on the insulating layer BP and is electrically connected to the drain electrode D1 through the opening O1. The opening O1 penetrates, for example, the insulating layer BP and the flat layer PL. The touch electrode E has an opening O2 corresponding to the opening O1. The pixel electrode PE further includes, for example, a display medium layer and a filter element substrate.

In summary, the same signal line L (or touch signal line) of the touch display panel 50 of this embodiment can be electrically connected to more than two touch electrodes. Therefore, a chip used to provide touch signals The number of pins can be reduced, and it can also be said that the number of chips required can be reduced. Since the number of chips can be reduced, the area of the peripheral area of the touch display panel can be reduced, and the manufacturing cost of the touch display panel can be reduced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make slight changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

10, 20, 30, 40, 50: touch display panel 100: substrate 110: pixel array 1201: The first touch group 120P: P touch group 122: touch unit 1221~122q: first touch unit~qth touch unit 130: chip A: Thin film transistor A1: Switching element A2: Anti-interference components AA: Display area B1: The first buffer layer B2: second buffer layer BA: Surrounding area BP: insulating layer CH1, CH2: channel layer CL, CL1, CL2: Shared signal line D1, D2: Drain DL: Data line E: Touch electrode GA1, GA2: gate G1, G2, G3, G4, M1, M2, M3, M4: control signal GI1: first gate insulating layer GI2: Second gate insulating layer GL: Control signal line GL1: The first control signal line GL2: The second control signal line H1, H2, H3, H4, O1, O2, O3: opening I1, I2: insulating layer L: signal line LCD: liquid crystal display mode P1: The first test pad P2: The second test pad PE: pixel electrode PL: Flat layer S1, S2: source SL: scan line SM1, SM2: shading layer SR: Drive circuit T: Active component TL: Touch signal line TL1~TLq: the first touch signal line~the qth touch signal line TP: Touch sensing mode Von, Voff: signal

FIG. 1A is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 1B is a schematic top view of a touch display panel according to an embodiment of the invention. 2 is a schematic diagram of a control signal of a touch display panel according to an embodiment of the invention. 3 is a schematic diagram of a control signal of a touch display panel according to an embodiment of the invention. 4 is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 5 is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 6 is a schematic top view of a touch display panel according to an embodiment of the invention. FIG. 7A is a schematic top view of a touch display panel according to an embodiment of the invention. Fig. 7B is a schematic cross-sectional view taken along line aa' of Fig. 7A. Fig. 7C is a schematic cross-sectional view taken along line bb' of Fig. 7A.

10: Touch display panel

100: substrate

1201: The first touch group

120P: P touch group

122: touch unit

130: chip

A1: Switching element

A2: Anti-interference components

AA: Display area

BA: Surrounding area

CL: Shared signal line

E: Touch electrode

GL1: The first control signal line

GL2: The second control signal line

TL: Touch signal line

Claims (13)

A touch unit includes: a touch electrode; a plurality of switching elements electrically connected to the touch electrode; a touch signal line electrically connected to the switching elements; a first control signal line electrically connected to the Some switching elements; an anti-interference element electrically connected to the touch electrode; a common signal line electrically connected to the anti-interference element; and a second control signal line electrically connected to the anti-interference element. The touch unit described in the first item of the scope of patent application includes a plurality of the anti-interference components, wherein the anti-interference components are electrically connected to the common signal line and the second control signal line. A touch display panel includes: a substrate; a pixel array located on the substrate; and a first touch group to a P-th touch group located on the substrate, and the first touch group The groups to the P-th touch group are arranged in P rows in sequence, where P is a positive integer, and each of the first to the P-th touch group includes a plurality of touch units, Each touch unit includes: a touch electrode; A switch element is electrically connected to the touch electrode; a touch signal line is electrically connected to the switch element; a first control signal line is electrically connected to the switch element; an anti-interference element is electrically connected to the touch Electrode; a common signal line electrically connected to the anti-interference element; and a second control signal line electrically connected to the anti-interference element, wherein the touch units in the same row correspond to the same first control signal line The touch units located in the same row correspond to the same second control signal line, and the same touch signal line is electrically connected to the touch electrodes of two or more of the touch units. In the touch display panel described in item 3 of the scope of patent application, the switch elements of the touch units located in adjacent rows are electrically connected to different touch signal lines. The touch display panel according to claim 3, wherein each of the first touch group to the Pth touch group includes the touch units within q rows, where q is greater than or equal to 1 A positive integer. In the touch display panel described in item 5 of the scope of patent application, the first control signal lines of the touch units in more than two rows are electrically connected to each other. The touch display panel described in item 3 of the scope of patent application further includes: a first test pad electrically connected to the common signal line of some of the touch units; and A second test pad is electrically connected to the common signal line of another part of the touch units, and the part of the touch units electrically connected to the first test pad is electrically connected to the second test The touch units are alternately arranged on the other part of the pad. The touch display panel described in item 3 of the scope of patent application, wherein the pixel array includes: a plurality of scan lines and a plurality of data lines on the substrate, wherein the first control signal line and the second control signal The lines and the scan lines belong to the same film layer, the touch signal line, the common signal line and the data lines belong to the same film layer; a plurality of active components are electrically connected to the scan lines and the data lines; And a plurality of pixel electrodes are electrically connected to the active components. In the touch display panel described in claim 8, wherein the touch electrodes overlap the pixel electrodes. For the touch display panel described in claim 3, each of the touch units includes a plurality of the switch elements, wherein the switch elements of each of the touch units are electrically connected to the touch signal line and the second One control signal line. For the touch display panel described in claim 3, each of the touch units includes a plurality of the anti-interference components, and the anti-interference components of each of the touch units are electrically connected to the common signal line and the The second control signal line. The touch display panel described in claim 3, wherein the touch units overlap the pixel array. In the touch display panel described in item 3 of the scope of patent application, the switch element and the anti-interference element are located on a display area.

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