TWI602095B - Touch display device - Google Patents

Description

Touch display device

The disclosed embodiments relate to a touch display device, and in particular to a touch display device having a pressure sensing function.

Touch display devices have been widely used in various electronic products, such as smart phones, tablets, notebooks and so on. In order to enhance the user experience, a touch display device with a pressure sensing function has been proposed on the market. In addition to sensing the trajectory of the finger/stylus moving on the touch plane, the touch display device can trigger corresponding operations in response to different pressure strokes. However, such a touch display device often requires an additional pressure sensor to be stacked on the back side of the panel, which increases the cost and manufacturing difficulty of the related components, and is more likely to cause an increase in the thickness of the panel or affect the transmittance of the liquid crystal display panel. .

Therefore, how to improve the performance of the touch display device with the pressure sensing function and reduce the manufacturing cost thereof is one of the problems that the industry is currently focusing on.

Some embodiments of the present disclosure provide a touch display device including: a first substrate including a plurality of pixels and a plurality of transistors; a second substrate disposed opposite to the first substrate; and a first electrode formed on the first substrate The second electrode is formed on the first substrate and electrically connected to the first electrode. The third electrode is formed on the second substrate, wherein the second electrode and the third electrode are used to detect a pressing touch event.

The features and advantages of the embodiments of the present invention will be more apparent and understood.

EL1‧‧‧ first electrode

EL2‧‧‧second electrode

EL3‧‧‧ third electrode

MT1‧‧‧Metal wire

MT2‧‧‧Metal wire

VH1‧‧‧ connection hole

VH2‧‧‧ connection hole

VH3‧‧‧ connection hole

100‧‧‧Touch display device

101A‧‧‧ display area

101B‧‧‧Non-display area

102‧‧‧Substrate

104‧‧‧film transistor

106‧‧‧gate electrode

108‧‧‧ gate dielectric layer

110‧‧‧Semiconductor layer

112‧‧‧Source electrode

114‧‧‧汲electrode

116‧‧‧First insulation

118‧‧‧Second insulation

118S‧‧‧ surface

120‧‧‧connection hole

122‧‧‧connection hole

124‧‧‧pixel electrodes

126‧‧‧ third insulation

128‧‧‧fourth insulation

130‧‧‧Display media

132‧‧‧Substrate

134‧‧‧ shading layer

136‧‧‧Color filter layer

138‧‧‧protection layer

140‧‧‧ spacers

142‧‧‧Connecting components

144‧‧‧ dielectric layer

146‧‧‧Color filter substrate

148‧‧‧ dielectric layer

150‧‧‧protective glass

152‧‧‧ pixels

154‧‧‧Information line

156‧‧ ‧ gate line

600‧‧‧Touch display device

700‧‧‧Touch display device

800‧‧‧Touch display device

800'‧‧‧ touch display device

900‧‧‧Touch display device

20‧‧‧ Controller

30‧‧‧ Controller

40‧‧‧ Controller

50‧‧‧ Controller

M1‧‧‧ first conductive layer

M2‧‧‧Second conductive layer

M3‧‧‧ third conductive layer

M4‧‧‧4th conductive layer

GP‧‧‧ gap

GP1‧‧‧ gap

GP2‧‧‧ gap

1B-1B‧‧‧ line segment

D‧‧‧ gap

Df‧‧‧ gap

D1‧‧‧ gap

Df1‧‧‧ gap

Cp‧‧‧ capacitor

Cf‧‧‧ capacitor

Cp1‧‧‧ capacitor

Cf1‧‧‧ capacitor

Ctp‧‧‧ capacitor

Cfb‧‧‧ feedback capacitor

SB1‧‧‧ first substrate

SB2‧‧‧second substrate

SB2T‧‧‧ upper surface

A1‧‧ Direction

A2‧‧‧ direction

Vdd‧‧‧ power supply

SW1‧‧‧ switch

SW2‧‧‧ switch

Amp‧‧Amplifier

Vref‧‧‧reference voltage

Vout‧‧‧Sensing output signal

Rtp‧‧‧ resistance

OB‧‧‧ objects

L0‧‧‧ signal value

L1‧‧‧ signal value

L2‧‧‧ signal value

TH1‧‧‧ threshold

TH2‧‧‧ threshold

Tx1‧‧‧Transfer electrode

Tx2‧‧‧Transfer electrode

Txn‧‧‧Transfer electrode

TU‧‧‧Transfer electrode unit

BG‧‧‧Bridge structure

FIG. 1A is a top view of a touch display device according to some embodiments of the present disclosure.

1B is a cross-sectional view of a touch display device in accordance with some embodiments of the present disclosure.

2A is a top view of a first electrode and a second electrode in accordance with some embodiments of the present disclosure.

2B is a top view of the first electrode and the second electrode in accordance with still other embodiments of the present disclosure.

2C is a top view of the first electrode and the second electrode in accordance with further embodiments of the present disclosure.

2D is a top view of a first electrode and a second electrode in accordance with further embodiments of the present disclosure.

3A is a top view of a third electrode in accordance with some embodiments of the present disclosure.

Figure 3B is a top view of a third electrode in accordance with further embodiments of the present disclosure.

3C is a top view of a third electrode in accordance with further embodiments of the present disclosure.

4A is a cross-sectional view of a touch display device in accordance with some embodiments of the present disclosure.

FIG. 4B is a diagram showing a related equivalent circuit diagram of the touch display device of FIG. 4A.

4C is a cross-sectional view of a touch display device in accordance with some embodiments of the present disclosure.

FIG. 4D is a diagram showing a related equivalent circuit diagram of the touch display device of FIG. 4C.

Figure 4E is a waveform diagram of a sensed output signal in accordance with some embodiments of the present disclosure.

FIG. 4F is a cross-sectional view of a touch display device according to some embodiments of the present disclosure.

FIG. 4G is a diagram showing a related equivalent circuit diagram of the touch display device of FIG. 4F.

FIG. 5A is a cross-sectional view of a touch display device according to some embodiments of the present disclosure.

FIG. 5B is a diagram showing a related equivalent circuit diagram of the touch display device of FIG. 5A.

FIG. 5C is a cross-sectional view of a touch display device according to some embodiments of the present disclosure.

FIG. 5D is a diagram showing an equivalent circuit diagram of the touch display device of FIG. 5C.

Figure 5E is a waveform diagram of a sensed output signal in accordance with some embodiments of the present disclosure.

Figure 6 is a cross-sectional view of a touch display device in accordance with still other embodiments of the present disclosure.

Figure 7 is a cross-sectional view of a touch display device in accordance with still other embodiments of the present disclosure.

FIG. 8A is a top view of a touch display device according to other embodiments of the present disclosure.

FIG. 8B is a cross-sectional view of a touch display device according to other embodiments of the present disclosure.

FIG. 8C is a top view of a touch display device according to other embodiments of the present disclosure.

9A is a touch display device according to other embodiments of the present disclosure. view.

FIG. 9B is a cross-sectional view of a touch display device according to other embodiments of the present disclosure.

FIG. 9C is a top view of a touch display device according to other embodiments of the present disclosure.

The touch display device of some embodiments of the present disclosure is described in detail below. It will be appreciated that the following description provides many different embodiments or examples for implementing the various embodiments of the present disclosure. The specific elements and arrangements described below are merely illustrative of some embodiments of the present disclosure. Of course, these are only used as examples and not as a limitation of the disclosure. Moreover, repeated numbers or labels may be used in different embodiments. These repetitive examples are merely illustrative of some embodiments of the present disclosure and are not intended to represent any of the various embodiments and/or structures discussed. Furthermore, when a first material layer is on or above a second material layer, the first material layer is in direct contact with the second material layer. Alternatively, it is also possible to have one or more layers of other materials interposed, in which case there may be no direct contact between the first layer of material and the second layer of material.

In addition, relative terms such as "lower" or "bottom" and "higher" or "top" may be used in the embodiments to describe the relative relationship of one element of the drawing to another. It will be understood that if the device of the drawing is flipped upside down, the component described on the "lower" side will become the component on the "higher" side.

Here, the terms "about", "about" and "major" generally mean within 20% of a given value or range, preferably within 10%, and more preferably within 5%, or 3 Within %, or within 2%, or within 1%, or within 0.5%. The quantity given here is an approximate quantity, that is, in the absence of specific descriptions of "about", "about" and "major", the meanings of "about", "about" and "major" may still be implied.

It will be understood that the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and/or portions, such elements, components, and regions. The layers, and/or portions are not to be limited by the terms, and the terms are used to distinguish different elements, components, regions, layers, and/or parts. Therefore, a first element, component, region, layer, and/or portion discussed below may be referred to as a second element, component, region, layer, without departing from the teachings of the disclosed embodiments. And / or part.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning meaning It will be understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the context or context of the present disclosure, and should not be in an idealized or overly formal manner. Interpretation, unless specifically defined in the disclosed embodiments.

The embodiments of the present disclosure are also to be understood as part of the description of the invention. It should be understood that the drawings of the present embodiments are not to be The shapes and thicknesses of the embodiments may be exaggerated in the drawings in order to clearly illustrate the features of the disclosed embodiments. In addition, the structures and devices in the drawings are schematically illustrated in order to clearly illustrate the features of the disclosed embodiments.

In some embodiments of the disclosure, relative terms such as "down", "upper", "horizontal", "vertical", "below", "above", "top", "bottom", etc. should be It is understood to be the orientation depicted in this paragraph and related figures. This relative term is used for convenience of description only, and does not mean that the device described therein is to be manufactured or operated in a particular orientation. Terms such as "joining" and "interconnecting", etc., unless otherwise defined, may mean that two structures are in direct contact, or that two structures are not in direct contact, and other structures are provided here. Between the two structures. The term "joining and joining" may also include the case where both structures are movable or both structures are fixed.

It should be noted that the term "substrate" may hereinafter include the formed elements on the transparent substrate and the various film layers overlying the substrate, and any desired transistor elements may have been formed thereon, but here to simplify The figure is shown only on a flat substrate. In addition, the "substrate surface" includes the uppermost and exposed film layer on the transparent substrate, such as an insulating layer and/or metal lines.

Some embodiments of the present disclosure are configured to simultaneously provide a first electrode for detecting a planar touch event and a second electrode for detecting a touch event on the first substrate. In this way, the touch sensor device does not need to add a pressure sensor to specifically sense the pressing touch event, and the controller does not need to use a dedicated signal channel to process the pressure sensing signal from the pressure sensor.

In addition, some embodiments of the present disclosure electrically isolate the first electrode for detecting a planar touch event and the second electrode for detecting a touch touch event, so that the first electrode and the second electrode are The planar touch sensing signal and the pressing touch sensing signal are respectively transmitted to the controller through independent and different signal channels. Therefore, the controller of some embodiments may be configured by the above planar touch sensing signal. Determine whether a flat touch event occurs, and determine whether a press touch event occurs by pressing the touch sensing signal.

In addition, since the touch display device of some embodiments can separately determine whether a pressing touch event occurs, the touch sensing device can be more accurately sensed and can perform multi-point and multi-step pressing touch. Sensing.

First, referring to FIG. 1A-1B, FIG. 1A is a top view of a touch display device 100 according to some embodiments of the present disclosure. Fig. 1B is a cross-sectional view taken along line 1B-1B' of Fig. 1A. As shown in FIG. 1A-1B, according to some embodiments of the present disclosure, the touch display device 100 includes a first substrate SB1, a second substrate SB2, and a first electrode EL1 and a second electrode EL2 disposed on the first substrate SB1. And a third electrode EL3 disposed on the second substrate SB2.

In some embodiments of the present disclosure, the first substrate SB1 is, for example, a Thin-Film Transistor (TFT) substrate, and includes a plurality of pixels and a plurality of transistors (not shown in the figure). The second substrate SB2 is disposed opposite to the first substrate SB1. In some embodiments of the present disclosure, the second substrate SB2 is, for example, but not limited to, a color filter substrate or a transparent substrate.

As shown in FIGS. 1A-1B, according to some embodiments, the first electrode EL1 and the second electrode EL2 are formed on the first substrate SB1 and interposed between the first substrate SB1 and the second substrate SB2. And the first electrode EL1 and the second electrode EL2 are electrically isolated from each other.

The voltages of the first electrode EL1 and the second electrode EL2 are controlled by the controller 20 in the touch display device 100, and can be selectively used as a common electrode of the pixel on the first substrate SB1 in a control period. a layer or a touch electrode layer for sensing a touch event. For example, the controller can be in a touch display device The first signal EL1 and the second electrode EL2 are used as the common electrodes of the pixels, and the touch display device 100 is operated on the touch display device 100. In the mode, the first electrode EL1 and the second electrode EL2 output a second signal (for example, a touch sensing pulse), and the first electrode EL1 and the second electrode EL2 are used as the touch electrodes.

Continuing to refer to FIGS. 1A-1B, according to some embodiments of the present disclosure, the third electrode EL3 is formed over the second substrate SB2 and between the first substrate SB1 and the second substrate SB2. Further, the third electrode EL3 on the second substrate SB2 is disposed corresponding to the second electrode EL2 on the first substrate SB1 to form a capacitance Cp with the second electrode EL2. The material of the third electrode EL3 may be a transparent conductive material or a metal material.

In addition, in some embodiments of the present disclosure, the first electrode EL1 on the first substrate SB1 is used to detect a planar touch event, and the second electrode EL2 on the first substrate SB1 and the second substrate SB2 are The three-electrode EL3 is used to detect a pressing touch event.

In detail, in the embodiment of FIG. 1A, the first electrode EL1 and the second electrode EL2 are realized by a self-capacity in-cell structure. As shown in FIG. 1A, a plurality of first electrodes EL1 and second electrodes EL2 are provided on the first substrate SB1. A gap GP is provided between the plurality of first electrodes EL1, and the plurality of second electrodes EL2 are disposed in the gap GP. Each of the first electrodes EL1 is connected to the controller 20 through a metal wire MT1. Each of the second electrodes EL2 is connected to the controller 20 through a metal wire MT2. Each of the metal wires MT1 and MT2 is independent of each other. Therefore, the controller 20 can set the voltage level of the first electrode EL1 through the metal wire MT1 to serve as a common electrode or a planar touch electrode of the pixel. And the controller 20 can set the voltage level of the second electrode EL2 through the metal wire MT2 to make it as a picture. The common electrode or the touch electrode.

The metal wires MT1 and MT2 and the first electrode EL1 and the second electrode EL2 may be disposed in two different layers, and an insulating layer is spaced between the two layers. Each of the metal wires MT1 and the corresponding first electrode EL1 are electrically connected to the insulating layer through the connection hole VH1. The metal wires MT2 and the corresponding second electrodes EL2 are electrically connected to the insulating layer through the connection holes VH2.

When the touch display device is operated in the touch mode, the controller 20 can sense the signal change from the first electrode EL1 through the metal wire MT1, and generate a sensing output signal based on the sensed signal change. By determining the magnitude of the sensed output signal, the controller 20 can determine whether a planar touch event has occurred.

In detail, when an object (such as a finger, a stylus, or any other object that can be used for a touch operation) touches the upper surface SB2T of the second substrate SB2, a capacitance is generated between the object and the first electrode EL1, so that a capacitance is generated. The capacitance of the metal wire MT1 electrically connected to the first electrode EL1 is increased. Therefore, the controller 20 senses that the signal from the metal wire MT1 also becomes large. If the sensed output signal generated based on the increased signal is higher than a predetermined threshold, the controller 20 can determine that a planar touch event has occurred.

In addition, when the touch display device is operated in the touch control mode, the controller 20 can sense the signal change from the second electrode EL2 through the metal wire MT2, and generate a sensing output signal based on the sensed signal change. By determining the magnitude of the sensed output signal, the controller 20 can determine whether a press touch event has occurred.

In detail, according to the embodiment of the present disclosure, the gap d between the second and third electrode layers EL2 and EL3 is changed by an external force. For example, when the finger presses the substrate to cause the gap d to decrease, the capacitance value of the capacitor Cp is increased. Electrically connect to this The capacitance of the metal wire MT2 of the two electrodes EL2 is increased. Therefore, the controller 20 senses that the signal from the metal wire MT2 also becomes large. If the sensing output signal generated based on the increased signal is higher than a predetermined threshold, the controller 20 can determine that the touch event occurred is a vertical (eg, z-direction) pressing touch event (eg, applying a certain amount) Force the touch screen).

As can be seen from the above, some embodiments of the present disclosure are provided with a first electrode EL1 for detecting a planar touch event and a second electrode EL2 for detecting a touch event. In this way, the touch sensor device does not need to add a pressure sensor to specifically sense the pressing touch event, and the controller does not need to use a dedicated signal channel to process the pressure sensing signal from the pressure sensor.

In addition, some embodiments of the present disclosure electrically isolate the first electrode EL1 for detecting a planar touch event and the second electrode EL2 for detecting a touch touch event, so that the first electrode EL1 and the first electrode The two electrodes EL2 can transmit the planar touch sensing signal and the pressing touch sensing signal to the controller 20 by independent and different signal channels (that is, the metal wire MT1 and the metal wire MT2). Therefore, the controller 20 of the embodiment may determine whether a planar touch event occurs by using the planar touch sensing signal, and determine whether the pressing touch event occurs by pressing the touch sensing signal.

In addition, since the touch display device 100 of some embodiments can separately determine whether a pressing touch event occurs, the touch sensing device 100 can be more accurately sensed and can perform multi-point and multi-step pressing. Touch sensing.

Continuing to refer to FIGS. 1A-1B , according to some embodiments of the present disclosure, the third electrode EL3 does not overlap with the first electrode EL1 to prevent the third electrode EL3 from affecting the planar touch detection of the first electrode EL1.

In addition, it should be noted that although a second electrode EL2 in FIG. 1A-1B corresponds to only one third electrode EL3, the embodiment of the present disclosure is not limited thereto. In some other embodiments of the present disclosure, one second electrode EL2 may correspond to a plurality of third electrodes EL3, for example, 3 to 20 third electrodes EL3.

2A-2D is a top view of a different configuration of a first electrode and a second electrode in accordance with some embodiments of the present disclosure. As shown in FIG. 2A, according to some embodiments of the present disclosure, each of the transistors is electrically connected to a data line (not shown in the figure) and a scan line (not shown in the figure), wherein the data line and the scan line are electrically connected. Interlaced, and the scanning line extends along a first direction A1, and the direction perpendicular to the first direction A1 is a second direction A2. In the embodiment shown in Fig. 2A, the second electrode EL2 is disposed in the gap GP1 parallel to the first direction.

2B is a top view of the first electrode EL1 and the second electrode EL2 according to other embodiments of the present disclosure. In this embodiment, the second electrode EL2 is disposed in the gap GP2 perpendicular to the first direction A1. As shown in FIG. 2B, the gap GP2 is also parallel to the second direction A2.

2C is a top view of the first electrode EL1 and the second electrode EL2 according to other embodiments of the present disclosure. In this embodiment, the second electrode EL2 is simultaneously disposed in the gap GP1 parallel to the first direction A1 and the gap GP2 perpendicular to the first direction A1.

2D is a top view of the first electrode EL1 and the second electrode EL2 according to other embodiments of the present disclosure. In this embodiment, the first electrode EL1 overlaps with the second electrode EL2. In this embodiment, the first electrode EL1 and the second electrode EL2 may be located in two different layers, and an insulating layer is spaced between the two layers.

3A-3C is a third electrode EL3 according to some embodiments of the present disclosure The upper view of the pattern. Taking FIG. 3A as an example, when the electro-crystal system in the first substrate SB1 is electrically connected to a plurality of data lines (such as the data line of FIG. 9C) and the scan lines (such as the scan line of FIG. 9C), and The data lines are alternately arranged with the scanning lines, and the electrode patterns of the third electrode EL3 may overlap or be parallel to the scanning lines (as shown in FIG. 3A). In other words, in this embodiment, the electrode pattern of the third electrode EL3 is parallel to the first direction A1.

3B is a top view of a third electrode EL3 in accordance with still other embodiments of the present disclosure. In this embodiment, the electrode pattern of the third electrode EL3 is overlapped or parallel to the data line. In some embodiments of the present invention, if the data line extends along the second direction A2, the electrode pattern of the third electrode EL3 is parallel to the second direction A2.

3C is a top view of a third electrode EL3 in accordance with further embodiments of the present disclosure. In this embodiment, the third electrode EL3 is simultaneously overlapped or parallel with the data lines and the scan lines to form a grid pattern.

4A is a cross-sectional view of a touch display device 100 in accordance with some embodiments of the present invention. In some embodiments of the present invention, FIG. 4A is, for example, a cross-sectional view of the second electrode EL2 along the first direction A1 in FIG. 2B. The touch display device 100 has a display area 101A and a non-display area 101B. The first substrate SB1 may include a substrate 102, which may include a transparent substrate, such as a glass substrate, a ceramic substrate, a plastic substrate, or any other suitable substrate. In addition, the first substrate SB1 may include a thin film transistor 104 including a gate electrode 106 disposed on the substrate 102, and a gate dielectric layer 108 disposed on the gate electrode 106 and the substrate 102.

The gate electrode 106 can be an amorphous germanium, a germanium germanium, one or more metals, a metal nitride, a conductive metal oxide, or a combination thereof. The above metals may include, but are not limited to, molybdenum, tungsten, titanium, tantalum, platinum or hafnium. Metal nitridation Materials may include, but are not limited to, molybdenum nitride, tungsten nitride, titanium nitride, and tantalum nitride. The above conductive metal oxide may include, but is not limited to, ruthenium oxide and indium tin oxide. The gate electrode 106 can be formed by the aforementioned chemical vapor deposition (CVD), sputtering, resistance heating evaporation, electron beam evaporation, or any other suitable deposition method, for example, in an embodiment. The amorphous germanium conductive material layer or the polycrystalline germanium conductive material layer may be deposited by low pressure chemical vapor deposition (LPCVD) at a temperature between 525 and 650 ° C, and may have a thickness ranging from about 1000 Å to about 10000 Å.

The gate dielectric layer 108 can be hafnium oxide, tantalum nitride, hafnium oxynitride, a high-k dielectric material, or any other suitable dielectric material, or a combination thereof. The material of the high-k dielectric material may be a metal oxide, a metal nitride, a metal halide, a transition metal oxide, a transition metal nitride, a transition metal telluride, a metal oxynitride, Metal aluminate, zirconium silicate, zirconium aluminate. For example, the high-k dielectric material may be LaO, AlO, ZrO, TiO, Ta ₂ O ₅ , Y ₂ O ₃ , SrTiO ₃ (STO), BaTiO ₃ (BTO), BaZrO, HfO. ₂ , HfO ₃ , HfZrO, HfLaO, HfSiO, HfSiON, LaSiO, AlSiO, HfTaO, HfTiO, HfTaTiO, HfAlON, (Ba, Sr)TiO ₃ (BST), Al ₂ O ₃ , other high dielectric constants of other suitable materials Dielectric material, or a combination of the above. The gate dielectric layer 108 can be formed by chemical vapor deposition (CVD) or spin coating. The chemical vapor deposition method can be, for example, low pressure chemical vapor deposition (LPCVD). Low temperature chemical vapor deposition (LTCVD), rapid thermal chemical vapor deposition (RTCVD), plasma enhanced chemical vapor deposition (PECVD) Atomic layer deposition (ALD) or other commonly used methods of atomic layer chemical vapor deposition.

In addition, a first conductive layer M1 can be formed simultaneously with the gate electrode 106 and located in the non-display area 101B of the touch display device 100.

The thin film transistor 104 further includes a semiconductor layer 110 disposed on the gate dielectric layer 108. The semiconductor layer 110 overlaps the gate electrode 106, and the source electrode 112 and the drain electrode 114 are respectively disposed on the semiconductor layer 110. The sides overlap with portions of both sides of the semiconductor layer 110, respectively.

The semiconductor layer 110 may include an elemental semiconductor including germanium, germanium; a compound semiconductor including gallium nitride (GaN), silicon carbide, gallium arsenide, gallium phosphide ( Gallium phosphide, indium phosphide, indium arsenide and/or indium antimonide; alloy semiconductors including bismuth alloy (SiGe), phosphorus gallium arsenide (GaAsP), arsenic Aluminum indium alloy (AlInAs), arsenic aluminum gallium alloy (AlGaAs), arsenic gallium alloy (GaInAs), indium gallium alloy (GaInP) and/or phosphorus indium gallium alloy (GaInAsP), indium gallium zinc oxide (InGaZnO), Amorphous germanium (A-Si), low temperature polycrystalline germanium (LTPS) or a combination of the above.

The material of the source electrode 112 and the drain electrode 114 may include copper, aluminum, molybdenum, tungsten, gold, chromium, nickel, platinum, titanium, niobium, tantalum, the above alloy, the above combination or other conductive metal. The material may be, for example, a three-layer structure of molybdenum aluminum molybdenum (Mo/Al/Mo) or titanium aluminum titanium (Ti/Al/Ti). In other embodiments, the source is electrically The material of the pole 112 and the drain electrode 114 may be a non-metallic material as long as the material used is electrically conductive. The material of the source electrode 112 and the drain electrode 114 can be formed by the aforementioned chemical vapor deposition (CVD), sputtering, resistance heating evaporation, electron beam evaporation, or any other suitable deposition method. . In some embodiments, the material of the source electrode 112 and the drain electrode 114 may be the same and may be formed by the same deposition step. However, in other embodiments, the source electrode 112 and the drain electrode 114 may be formed by different deposition steps, and the materials thereof may be different from each other.

In addition, a second conductive layer M2 can be formed simultaneously with the source electrode 112 and the drain electrode 114, and is located in the non-display area 101B of the touch display device 100. The second conductive layer M2 is electrically connected to the first conductive layer M1.

Continuing to refer to FIG. 4A, the first substrate SB1 further includes a first insulating layer 116 covering the thin film transistor 104 and the gate dielectric layer 108. The first insulating layer 116 may be tantalum nitride, hafnium oxide, or hafnium oxynitride. The first insulating layer 116 can be formed by chemical vapor deposition (CVD) or spin coating. The chemical vapor deposition method can be, for example, low pressure chemical vapor deposition (LPCVD), low temperature chemistry. Low temperature chemical vapor deposition (LTCVD), rapid thermal chemical vapor deposition (RTCVD), plasma enhanced chemical vapor deposition (PECVD), atom Atomic layer deposition (ALD) or other commonly used methods of layer chemical vapor deposition.

Then, a second insulating layer 118 is selectively disposed on the first insulating layer 116. The material of the second insulating layer 118 may be an organic insulating material (photosensitive resin) or an inorganic insulating material (tantalum nitride, hafnium oxide, antimony oxynitride, niobium carbide, oxidation). Aluminum, or a combination of the above materials). In addition, the second insulating layer 118 and the first insulating layer 116 may be respectively etched by two etching steps to form the connection holes 120 and 122. The connection hole 120 extends downward from the upper surface 118S of the second insulating layer 118 to the drain electrode 114 and exposes the drain electrode 114. The connection hole 122 extends downward from the upper surface 118S of the second insulating layer 118 to the second conductive layer M2, and exposes the second conductive layer M2.

Continuing to refer to FIG. 4A, the display device 100 further includes a pixel electrode 124 disposed on the second insulating layer 118. The pixel electrode 124 extends into the connection hole 120 and is electrically connected to the thin film transistor 104. In addition, the display device 100 further includes a third conductive layer M3 disposed on the second insulating layer 118. The third conductive layer M3 is located in the non-display area 101B of the touch display device 100, and is electrically connected to the second conductive layer M2 through the connection hole 122.

The material of the third conductive layer M3 and the pixel electrode 124 can be the same, and can be formed by the same deposition and lithography etching step. The material of the third conductive layer M3 and the pixel electrode 124 may include a transparent conductive material such as indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), Indium tin zinc oxide (ITZO), antimony tin oxide (ATO), antimony zinc oxide (AZO), combinations of the foregoing or any other suitable transparent conductive oxide material.

Continuing to refer to FIG. 4A, the display device 100 further includes a third insulating layer 126 disposed on the second insulating layer 118 and covering the pixel electrode 124. The third insulating layer 126 may be tantalum nitride, hafnium oxide, or hafnium oxynitride.

Continuing to refer to FIG. 4A, the display device 100 further includes a metal wire MT2 disposed on the third insulating layer 126. The material of the metal wire MT2 may include copper, aluminum, molybdenum, tungsten, gold, chromium, nickel, platinum, titanium, niobium, tantalum, the above alloy, the above combination or other conductive metal materials, for example, molybdenum. A three-layer structure of aluminum molybdenum (Mo/Al/Mo) or titanium aluminum titanium (Ti/Al/Ti). In other embodiments, the above metal guide The material of the wire MT2 may be a non-metallic material as long as the material used is electrically conductive. The material of the metal wire MT2 can be formed by the aforementioned chemical vapor deposition (CVD), sputtering, resistance heating evaporation, electron beam evaporation, or any other suitable deposition method.

Continuing to refer to FIG. 4A, the display device 100 further includes a fourth insulating layer 128 disposed on the third insulating layer 126 and covering the metal wires MT2. The fourth insulating layer 128 may be tantalum nitride, hafnium oxide, or hafnium oxynitride.

Continuing to refer to FIG. 4A, the display device 100 further includes a second electrode EL2 disposed on the fourth insulating layer 128 and electrically connected to the metal wire MT2. In addition, a fourth conductive layer M4 is disposed on the fourth insulating layer 128. The fourth conductive layer M4 is located in the non-display area 101B of the touch display device 100, and is electrically connected to the third conductive layer M3. The material of the fourth conductive layer M4 and the second electrode EL2 may be the same, and may be formed by the same deposition and lithography etching step.

The second electrode EL2 may be patterned to form a slit as a common electrode and a touch electrode of the touch display device 100. Further, the second electrode EL2 is transmitted through the connection hole VH2 to be connected to the metal wire MT2 of the lower layer. The fourth conductive layer M4 also passes through the other connection hole VH3.

The material of the second electrode EL2 and the fourth conductive layer M4 may include a transparent conductive material such as indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), Indium tin zinc oxide (ITZO), antimony tin oxide (ATO), antimony zinc oxide (AZO), combinations of the foregoing or any other suitable transparent conductive oxide material.

In addition, referring to FIG. 4A, the display device 100 further includes a second substrate SB2 disposed opposite to the first substrate SB1 and a first substrate SB1 and a second base. Display medium 130 between boards SB2.

The display device 100 can be a touch liquid crystal display, such as a thin film transistor liquid crystal display. Alternatively, the liquid crystal display can be a Twisted Nematic (TN) type liquid crystal display, a Super Twisted Nematic (STN) type liquid crystal display, or a Double Layer Super Twisted Nematic (DSTN). Liquid crystal display, Vertical Alignment (VA) type liquid crystal display, In-Plane Switching (IPS) type liquid crystal display, Cholesteric type liquid crystal display, Blue Phase type liquid crystal display, margin An electric field effect (FFS) type liquid crystal display, or any other suitable liquid crystal display.

In some embodiments of the present disclosure, the display medium 130 may be a liquid crystal material, which may include nematic, smectic, cholesteric, blue phase. Or any other suitable liquid crystal material. In some embodiments of the present disclosure, display medium 130 can be an organic light emitting diode.

In some embodiments, the second substrate SB2 is a color filter layer substrate. In detail, the second substrate SB2 as the color filter layer substrate may include a substrate 132, a light shielding layer 134 disposed on the substrate 132, a color filter layer 136 disposed on the light shielding layer 134 and the substrate 132, and The protective layer 138 of the light shielding layer 134 and the color filter layer 136 is covered.

The substrate 132 may include a transparent substrate, such as a glass substrate, a ceramic substrate, a plastic substrate, or any other suitable transparent substrate. The light shielding layer 134 may include a black photoresist, a black printing ink, and a black resin. The color filter layer 136 may include a red filter layer, a green filter layer, a blue filter layer, or any other suitable Combined with a color filter layer.

The display device 100 further includes a spacer 140 disposed between the first substrate SB1 and the second substrate SB2. The spacer 140 is a main structure for spacing the first substrate SB1 and the second substrate SB2 to prevent the display device 100. The first substrate SB1 is in contact with the second substrate SB2 when pressed.

Continuing to refer to FIG. 4A, according to some embodiments of the present disclosure, the third electrode EL3 is further disposed on the protective layer 138 of the second substrate SB2. The material of the third electrode EL3 may include a transparent conductive material and a metal material. The transparent conductive material is, for example, indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO), antimony tin oxide (ATO), Zinc oxide oxide (AZO), combinations of the foregoing, or any other suitable transparent conductive oxide material. The above metal material may include copper, aluminum, molybdenum, tungsten, gold, chromium, nickel, platinum, titanium, niobium, tantalum, the above alloys, combinations thereof, or other highly conductive metal materials.

In some embodiments of the present disclosure, the third electrode EL3 is interposed between the light shielding layer 134 and the second electrode EL2, and is located in the optical shielding region formed by the light shielding layer 134, but not limited thereto, the third electrode The EL 3 may be disposed between the light shielding layer 134 and the second substrate SB2 or between the light shielding layer 134 and the protective layer 138.

Thereafter, by pairing the first substrate SB1 and the second substrate SB2, a capacitance Cp can be formed between the second and third electrode layers EL2 and EL3, and the capacitance value of the capacitance Cp can be changed as the electrode spacing after pressing changes. Further, as shown in FIG. 4A, according to some embodiments, the second electrode EL2 is disposed between the pixel electrode 124 and the third electrode EL3.

In some embodiments, the touch display device 100 further includes a connection component 142 located in the non-display area 101B of the touch display device 100. The third electrode EL3 can The connecting member 142, the fourth conductive layer M4, the third conductive layer M3, the second conductive layer M2, and the first conductive layer M1 are electrically connected to the first substrate SB1.

The connecting member 142 may be an Au ball, an anisotropic conductive film (ACF), a silver glue or other conductive material. The voltage of the third electrode EL3 can be set through the connection element 142. For example, the voltage of the third electrode EL3 may be the voltage of the first signal (such as the common electrode voltage), the voltage of the second signal (such as the sensing signal voltage), the ground voltage or other specific voltage. Alternatively, the touch display device 100 may not include the connection element 142, and the voltage of the third electrode EL3 is in a floating state.

FIG. 4B is a diagram showing a related equivalent circuit diagram of the touch display device 100 of FIG. 4A. In this embodiment, the equivalent resistance of the metal wire MT2 is Rtp, and the equivalent capacitance seen along the laying path is Ctp (ie, the sum of capacitances formed between the metal wire MT2 and other electrode/metal layers), and The metal wire MT2 is more visible in the electrical connection with the second electrode EL2. The controller 30 includes a first switch SW1, a second switch SW2, an amplifier Amp, and a feedback capacitor Cfb. The first switch SW1 and the second switch SW2 are alternately turned on/off to charge and discharge the capacitors Ctp and Cp. Further, one end of the first switch SW1 is coupled to the power source Vdd. When the first switch SW1 is turned on, the second switch SW2 is turned off, and the power source Vdd will charge the capacitors Ctp and Cp. Conversely, when the second switch SW2 is turned on, the first switch SW1 will be turned off, at which time the charges accumulated in the capacitors Ctp and Cp will be output to one of the inputs of the amplifier Amp, and the other input of the amplifier Amp is, for example, coupled to the reference. Voltage Vref. A feedback capacitor Cfb is interposed between the input and output of the amplifier Amp to meet circuit stability and bandwidth considerations. The amplifier Amp can generate a sensed output signal Vout in response to a signal from the metal wire MT2. When no touch event occurs, the sensed output signal Vout can be expressed as follows:

Where n is the number of sensing cycles.

Next, referring to FIG. 4C, the figure is a schematic diagram of a touch-touch event occurring when the planar touch event occurs on the touch display device 100 according to some embodiments of the present invention.

As shown in FIG. 4C, when the object OB (for example, a finger, a stylus, or any other object that can be used for a touch operation) touches the touch display device 100, the object OB and the second of the touch display device 100 A sensing capacitor Cf is generated between the electrodes EL2. At this time, the relevant equivalent circuit is as shown in FIG. 4D, and the metal wire MT2 sees the sensing capacitor Cf more. Therefore, when a simple planar touch event occurs, the sensed output signal Vout can be expressed as follows:

As can be seen from the above formula 2, when the object OB touches the touch display device 100, the sense output signal Vout becomes large. That is, the value of the sense output signal Vout of Equation 2 is greater than the value of the sense output signal Vout of Equation 1.

See Figure 4E, which is a waveform diagram of a sensed output signal in accordance with some embodiments of the present invention. In some embodiments of the present invention, as shown in FIG. 4E, the controller sets a first threshold TH1 for determining whether a touch touch event has occurred. This first threshold TH1 corresponds, for example, to a signal value of 300.

When the touch event does not occur, the value of the sensed output signal Vout is L0 has a value of about 50 (where the value of the sensed output signal Vout is only used to express the magnitude relationship of the signal, there is no unit). When a simple planar touch event occurs (not repressed), the value of the sensed output signal Vout is L1, which is about 150. As shown in FIG. 4E, the value L1 is not higher than the first threshold TH1 (for example, the corresponding signal value 300), so the controller can determine that no touch event has occurred.

Further, it should be understood that the capacitance value of the sensing capacitor Cf is inversely related to the spacing df between the object OB and the second electrode EL2. That is, when the object OB is pressed to make the pitch df small, the capacitance value of the sensing capacitor Cf will increase, so that the sensing output signal Vout becomes large.

Further, the capacitance value of the sensing capacitor Cp is negatively correlated with the spacing d between the second electrode EL2 and the third electrode EL3. That is, when the object OB is pressed to make the pitch d small, the capacitance value of the sensing capacitor Cp will increase, so that the sensing output signal Vout becomes large.

Next, referring to FIG. 4F, the figure is a cross-sectional view of a touch display device 100 according to some embodiments of the present disclosure. When the object OB is heavily pressed so that the original gaps d and df become smaller than the gaps d1 and df1, the capacitance between the second electrode EL2 and the third electrode EL3 becomes smaller, so that the capacitance of the sensing capacitor Cp becomes larger. Cp1. Since the pitch between the object OB and the second electrode EL2 becomes small, the capacitance value of the sensing capacitor Cf becomes large as the capacitance Cf1. At this time, the relevant equivalent circuit is as shown in Fig. 4G. Therefore, when the pressing touch event occurs, the sensing output signal Vout can be expressed as follows:

In some embodiments of the present disclosure, when the pressing touch event occurs, the value of the sensing output signal Vout is L2, and the value is about 300. As shown in FIG. 4E, the value L2 is higher than the first threshold TH1 (for example, the corresponding signal value 250), so the controller can determine that the pressing touch event occurs at this time.

FIG. 5A is a cross-sectional view of the touch display device 100 according to some embodiments of the present disclosure when a touchless event occurs. In some embodiments of the present disclosure, FIG. 5A is, for example, a cross-sectional view of the second electrode B1 along the first direction A1 at the first electrode EL1. As shown in FIG. 5, according to some embodiments, the third electrode EL3 is not disposed in the region corresponding to the first electrode EL1 on the second substrate SB2, so the metal wire MT1 has no capacitance Cp generated by the third electrode EL3.

In addition, as shown in FIG. 5A, according to some embodiments of the present disclosure, the first electrode EL1 is disposed between the pixel electrode 124 and the third electrode EL3.

The equivalent circuit associated with Figure 5A is shown in Figure 5B. When no touch event occurs, the sensed output signal Vout can be expressed as follows:

As shown in FIG. 5C, when the object OB (for example, a finger, a stylus, or any other object that can be used for a touch operation) touches the touch display device 100, the object OB and the second of the touch display device 100 A sensing capacitor Cf is generated between the electrodes EL2. At this time, the relevant equivalent circuit is as shown in FIG. 5D, and the metal wire MT1 sees the sensing capacitance Cf more. Therefore, when a simple planar touch event occurs, the sensed output signal Vout can be expressed as follows:

As can be seen from the above formula 5, when the object OB touches the touch display device 100, the sense output signal Vout becomes large. That is, the value of the sense output signal Vout of Equation 5 is greater than the value of the sense output signal Vout of Equation 4.

See FIG. 5E, which is a waveform diagram of a sensed output signal in accordance with some embodiments of the present disclosure. In some embodiments of the present disclosure, as shown in FIG. 5E, the controller sets a second threshold TH2 for determining whether a planar touch event occurs. This second threshold TH2 corresponds, for example, to the signal value 150.

When the planar touch event does not occur, the value of the sensed output signal Vout is L0, and its value is about 50 (where the value of the sensed output signal Vout is only used to express the magnitude relationship of the signal, there is no unit). When a simple planar touch event occurs (no heavy press), the value of the sensed output signal Vout is L1, which is about 200. As shown in FIG. 5E, the value L1 is higher than the second threshold TH2 (for example, the corresponding signal value 150), so the controller can determine that a planar touch event has occurred.

Figure 6 is a cross-sectional view of a touch display device 600 in accordance with still other embodiments of the present disclosure. The main difference between the touch display device 600 and the touch display device 100 is that the touch display device 600 is formed by a pixel electrode 124 over a common electrode (for example, the second electrode EL2 and/or the first electrode EL1). Structure (Top Pixel). As shown in FIG. 6, the pixel electrode 124 is formed between the first and second electrodes EL1, EL2 and the third electrode EL3, and is electrically connected to the thin film transistor 104 in the first substrate SB1. Using this architecture generally allows the light transmittance of the touch display device to be obtained. Have to improve. The related signal operation and touch determination of the touch display device 600 are similar to those of the previous embodiment, and therefore are not described herein.

FIG. 7 is a cross-sectional view of a touch display device 700 in accordance with still other embodiments of the present disclosure. The main difference between the touch display device 700 and the touch display device 100 is that the second substrate SB2 is a backlight unit and is disposed on the lower side of the first substrate SB1. Moreover, in some embodiments of the present disclosure, the third electrode EL3 may be patterned into strips. However, in some other embodiments of the present disclosure, the third electrode EL3 disposed on the backlight unit may be a complete plane.

In this embodiment, the material of the third electrode EL3 may include a transparent conductive material such as indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), oxidation. Indium tin zinc (ITZO), antimony tin oxide (ATO), antimony zinc oxide (AZO), combinations of the foregoing or any other suitable transparent conductive oxide material.

In addition, in this embodiment, a dielectric layer 144 is disposed between the third electrode EL3 and the first substrate SB1. The dielectric layer 144 is, for example, an Optically Clear Adhesive/Resin layer or an air layer.

In addition, in this embodiment, the display device 100 may further include a color filter layer substrate 146. The color filter layer substrate 146 is disposed on the opposite side of the first substrate SB1 from the second substrate SB2 as a backlight unit. For example, the color filter layer substrate 146 is disposed on the upper side of the first substrate SB1, and the second substrate SB26 is disposed on the lower side of the first substrate SB1.

FIG. 8A is a top view of a touch display device 800 according to other embodiments of the present disclosure. FIG. 8B is a cross-sectional view of the touch display device 800. In the embodiment of FIG. 8A-8B, the touch display device 100 further includes a first substrate SB1. The plurality of transfer electrodes Tx1 T Txn are arranged, and the plurality of transfer electrodes Tx1 T Txn are interleaved with the first electrode EL1 and the second electrode EL2 and connected to the controller 40. The controller 40 is, for example, a touch control unit. Further, the controller 40 can be further connected to another controller 50, such as a display control unit.

In addition, as shown in FIG. 8A, according to some embodiments of the present invention, each of the transfer electrodes Tx1 T Txn includes a plurality of transfer electrode units TU and a plurality of bridge structures BG disposed on the first substrate SB1. Each of the bridge structures BG is electrically connected to two adjacent transfer electrode units TU to electrically connect the plurality of transfer electrode units TU to form one transfer electrode.

In this embodiment, the transfer electrodes Tx1 TTxn, the first electrode EL1, and the second electrode EL2 are implemented by a mutual capacitive touch structure. In some embodiments of the present disclosure, the first electrode EL1 and the second electrode EL2 are receiving electrodes.

In this embodiment, the first electrode EL1 and the second electrode EL2 as the receiving electrodes are arranged in a plurality of rows, and the transfer electrodes Tx1 to Txn are arranged in a plurality of rows. Further, as shown in FIGS. 8A-8B, according to some embodiments of the present disclosure, the two first electrodes EL1 and one second electrode EL2 are alternately arranged with each other. However, in some other embodiments of the disclosure, a first electrode EL1 and a second electrode EL2 may be alternately arranged with each other.

As shown in FIG. 8B, according to some embodiments of the present disclosure, a dielectric layer 148 (eg, an optical adhesive layer or an air layer) is disposed on the second substrate SB2 of the touch display device 800, and the dielectric layer 148 is attached. A protective glass 150 is provided.

It should be noted that the embodiment shown in FIG. 8A is for illustrative purposes only, and the scope of the disclosure is not limited thereto. Although in the embodiment shown in FIG. 8A, one of the transfer electrodes (or one transfer electrode unit TU) corresponds to only one third electrode EL3, A transfer electrode (or a transfer electrode unit TU) may also correspond to other numbers of third electrodes EL3, as shown in the embodiment of Fig. 8C, which will be described later in detail. Therefore, the scope of the disclosure is not limited to the embodiment shown in FIG. 8A.

FIG. 8C is a top view of the touch display device 800' according to other embodiments of the present disclosure. As shown in FIG. 8C, in accordance with some embodiments of the present disclosure, a transfer electrode unit TU may cover a plurality of rows of pixels 152, a plurality of rows of data lines 154, and a plurality of columns of gate lines (scan lines) 156. For example, in some embodiments of the present disclosure, one of the transmitting electrode units TU may cover 2 to 30 rows of pixels 152, and 2 to 30 rows of data lines 154, for example, covering 10 to 20 lines of pixels 152, and 10 Up to 20 lines of data line 154. In addition, in some embodiments of the present disclosure, one transmitting electrode (or one transmitting electrode unit TU) may correspond to 5 to 30 columns of gate lines (scanning lines) 156 and third electrodes EL3, for example, 10 to 20 columns of gate lines. (scanning line) 156 and third electrode EL3.

In addition, as shown in FIG. 8C, according to some embodiments of the present disclosure, a first electrode EL1 may cover a plurality of rows of pixels 152, a plurality of rows of data lines 154, and a plurality of columns of gate lines (scan lines) 156 and a third portion. Electrode EL3. For example, in some embodiments of the present disclosure, a first electrode EL1 may cover 2 to 30 rows of pixels 152, and 2 to 30 rows of data lines 154, for example, covering 10 to 20 rows of pixels 152, and 10 Up to 20 lines of data line 154. In addition, in some embodiments of the present disclosure, one first electrode EL1 may correspond to 5 to 30 columns of gate lines (scanning lines) 156 and third electrodes EL3, for example, 10 to 20 columns of gate lines (scanning lines) 156 and The third electrode EL3.

In addition, as shown in FIG. 8C, according to some embodiments of the present disclosure, a second electrode EL2 may also cover a plurality of rows of pixels 152, a plurality of rows of data lines 154, and a plurality of columns of gate lines (scan lines) 156. For example, in some embodiments of the present disclosure, one second electrode EL2 may cover 2 to 30 rows of pixels 152 and 2 to 30 rows of data lines. 154, for example, covers 10 to 20 rows of pixels 152, and 10 to 20 rows of data lines 154. In addition, in some embodiments of the present disclosure, one second electrode EL2 may correspond to 5 to 30 columns of gate lines (scan lines) 156 and third electrodes EL3, for example, 10 to 20 columns of gate lines (scan lines) 156 and The third electrode EL3.

FIG. 9A is a top view of a touch display device 900 according to other embodiments of the present disclosure. FIG. 9B is a cross-sectional view of the touch display device 900. In the embodiment of the 9A-9B, the third electrode EL3 disposed on the second substrate SB2 includes a plurality of transfer electrodes Tx1 T Txn, and the plurality of transfer electrodes Tx1 T Txn and the first electrode EL1 and the second electrode EL2 interlaced settings.

Further, in this embodiment, the transfer electrode is not provided between the first electrode EL1 and the second electrode EL2.

In this embodiment, the transfer electrodes Tx1 TTxn, the first electrode EL1, and the second electrode EL2 are implemented by a mutual capacitive touch structure. In some embodiments of the present disclosure, the first electrode EL1 and the second electrode EL2 are receiving electrodes. However, in other embodiments of the present disclosure, the third electrode EL3 disposed on the second substrate SB2 may include a plurality of receiving electrodes, and the first electrode EL1 and the second electrode EL2 are transmitting electrodes.

In this embodiment, the first electrode EL1 and the second electrode EL2 as the receiving electrodes are arranged in a plurality of rows, and the transfer electrodes Tx1 to Txn are arranged in a plurality of rows. Further, as shown in FIGS. 9A-9B, according to some embodiments of the present disclosure, the two first electrodes EL1 and one second electrode EL2 are alternately arranged with each other. However, in some other embodiments of the disclosure, a first electrode EL1 and a second electrode EL2 may be alternately arranged with each other.

As shown in FIG. 9B, according to some embodiments of the present disclosure, the touch display A dielectric layer 148 (eg, an optical adhesive layer or an air layer) is disposed on the second substrate SB2 of the device 900, and a protective glass 150 is disposed on the dielectric layer 148.

Fig. 9C is a partially enlarged view of the first electrode EL1 of one of the sheets of Fig. 9A. As shown in FIG. 9C, according to some embodiments of the present disclosure, a first electrode EL1 may cover a plurality of rows of pixels 152, a plurality of rows of data lines 154, a plurality of columns of gate lines (scan lines) 156, and a plurality of columns of transfer electrodes. . For example, in some embodiments of the present disclosure, a first electrode EL1 may cover 3 to 30 rows of pixels 152, and 4 to 30 rows of data lines 154, for example, covering 10 to 20 rows of pixels 152, and 10 Up to 20 lines of data line 154.

Further, according to some embodiments of the present disclosure, one first electrode EL1 may cover 3 to 30 columns of gate lines 156 and transfer electrodes, such as 10 to 20 columns of gate lines 156 and transfer electrodes. Moreover, in some embodiments of the present disclosure, the configuration of the second electrode EL2 is the same as or similar to the first electrode EL1 described above.

In summary, some embodiments of the present disclosure are configured to simultaneously provide a first electrode for detecting a planar touch event and a second electrode for detecting a touch event on the first substrate. In this way, the touch sensor device does not need to add a pressure sensor to specifically sense the pressing touch event, and the controller does not need to use a dedicated signal channel to process the pressure sensing signal from the pressure sensor.

In addition, some embodiments of the present disclosure electrically isolate the first electrode for detecting a planar touch event and the second electrode for detecting a touch touch event, so that the first electrode and the second electrode are The planar touch sensing signal and the pressing touch sensing signal are respectively transmitted to the controller through independent and different signal channels. Therefore, the controller of the embodiment can determine whether the planar touch event occurs by using the flat touch sensing signal, and determine whether the pressing touch event occurs by pressing the touch sensing signal.

In addition, since the touch display device of some embodiments can separately determine whether a pressing touch event occurs, the touch sensing device can be more accurately sensed and can perform multi-point and multi-step pressing touch. Sensing.

In addition, it should be noted that those skilled in the art are well aware that the drains and sources described in some embodiments are interchangeable, as their definition is related to the voltage level to which they are connected.

It should be noted that the component sizes, component parameters, and component shapes described above are not limitations of the disclosure. Those of ordinary skill in the art can adjust these settings according to different needs. In addition, the touch display device of some embodiments is not limited to the state illustrated in FIG. 1A-9C. Some embodiments may include any one or more of the features of any one or a plurality of embodiments of Figures 1A-9C. In other words, not all of the illustrated features must be simultaneously implemented in the touch display device of some embodiments of the present disclosure.

Although the embodiments of the present disclosure and its advantages are disclosed above, it should be understood that those skilled in the art can make changes, substitutions, and refinements without departing from the spirit and scope of the disclosure. Furthermore, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, compositions, devices, methods and steps in the specific embodiments described in the specification, and any one of ordinary skill in the art may The present disclosure discloses processes, machines, manufacturing, material compositions, devices, methods, and steps that are currently or in the future, as long as they can perform substantially the same function or obtain substantially the same result in the embodiments described herein. Some embodiments are disclosed for use. Accordingly, the scope of protection of the present disclosure includes the above-described processes, machines, manufacturing, material compositions, devices, methods, and procedures. In addition, each patent application scope constitutes an individual embodiment, and the scope of protection of the disclosure also includes The scope of each patent application and the combination of the embodiments are included.

EL1‧‧‧ first electrode

EL2‧‧‧second electrode

EL3‧‧‧ third electrode

MT1‧‧‧Metal wire

MT2‧‧‧Metal wire

VH1‧‧‧ connection hole

VH2‧‧‧ connection hole

100‧‧‧Touch display device

20‧‧‧ Controller

GP‧‧‧ gap

1B-1B‧‧‧ line segment

Claims (20)

A touch display device includes: a first substrate comprising a plurality of pixels and a plurality of thin film transistors; a second substrate disposed opposite the first substrate; a display medium disposed on the first substrate and the a first electrode is formed on the first substrate for detecting a planar touch event; a second electrode is formed on the first substrate and electrically connected to the first electrode And a third electrode is formed on the second substrate, wherein the second electrode and the third electrode are used to detect a pressing touch event. The touch display device of claim 1, wherein the touch display device comprises: a plurality of the first electrodes, wherein a plurality of the first electrodes have a gap therebetween, and the second electrode is provided In the gap. The touch display device of claim 2, wherein each of the thin film transistors is electrically connected to a data line and a scan line, wherein the data line is interlaced with the scan line, and the scan line is Extending along a first direction, wherein the second electrode is disposed in the gap parallel to the first direction. The touch display device of claim 2, wherein each of the thin film transistors is electrically connected to a data line and a scan line, wherein the data line is interlaced with the scan line, and the scan line is Extending along a first direction, wherein the second electrode is disposed in the gap perpendicular to the first direction. The touch display device of claim 2, wherein each of the The thin film transistor is electrically connected to a data line and a scan line, wherein the data line is interlaced with the scan line, and the scan line extends along a first direction, wherein the second electrode is simultaneously disposed parallel to the The gap in the first direction and in the gap perpendicular to the first direction. The touch display device of claim 1, wherein the first electrode and the second electrode are selectively used as a common electrode layer of the pixels in a control period, or A touch electrode layer for detecting touch events. The touch display device of claim 1, wherein each of the thin film transistors is electrically connected to a data line and a scan line, and the data line is interleaved with the scan line, wherein the third electrode The electrode pattern is overlapped or parallel to the data line. The touch display device of claim 1, wherein each of the thin film transistors is electrically connected to a data line and a scan line, and the data line is interleaved with the scan line, wherein the third electrode The electrode pattern overlaps or is parallel to the scan line. The touch display device of claim 1, wherein each of the thin film transistors is electrically connected to a data line and a scan line, and the data line is interleaved with the scan line, wherein the third electrode The electrode pattern is overlapped or parallel to the data line and the scan line. The touch display device of claim 1, further comprising: a connecting component disposed in a non-display area of the touch display device for electrically connecting the third electrode to the first substrate. The touch display device of claim 1, wherein the voltage of the third electrode is a common electrode voltage, a ground voltage, or a floating state. The touch display device of claim 1, further comprising: a pixel electrode electrically connected to one of the thin film transistors, wherein the first electrode and the second electrode are disposed on the pixel Between the electrode and the third electrode. The touch display device of claim 1, further comprising: a pixel electrode electrically connected to one of the thin film transistors and disposed between the second electrode and the third electrode. The touch display device of claim 1, wherein the second substrate is a color filter substrate. The touch display device of claim 1, wherein the second substrate is a backlight unit. The touch display device of claim 1, further comprising: a plurality of transmitting electrodes disposed on the first substrate, wherein the plurality of transmitting electrodes are interleaved with the first electrode and the second electrode. The touch display device of claim 16, wherein each of the transmitting electrodes comprises: a plurality of transmitting electrode units disposed on the first substrate; and a plurality of bridge structures, wherein each of the bridge structures is electrically The two adjacent transmitting electrode units are connected. The touch display device of claim 16, wherein the first electrode and the second electrode are receiving electrodes. The touch display device of claim 1, wherein the third electrode comprises: a plurality of transmitting electrodes disposed on the second substrate, wherein the plurality of transmitting electrodes and the first electrode and the second The electrodes are staggered. The touch display device of claim 19, wherein the first electrode and the second electrode are receiving electrodes.