TW201706796A - Touch display device - Google Patents

Abstract

A touch display device is disclosed, which comprises: a first substrate; a thin film transistor unit (TFT) disposed on the first substrate; a touch signal line disposed on the first substrate; a second substrate opposite to the first substrate; a touch electrode disposed on a side of the second substrate facing to the first substrate, wherein the touch electrode electrically connects to the touch signal line; and a display layer disposed between the first substrate and the second substrate.

Description

Touch display device

The present disclosure relates to a touch display device, and more particularly to an in-cell touch display device.

In recent years, with the development trend of humanization and simplification of operation, touch display devices with touch panels have been more and more widely used in life. Since the user can input signals by directly touching the touch panel by hand or other objects, thereby reducing or even eliminating the user's dependence on other input devices (such as a keyboard, a mouse, a remote controller, etc.), the user's convenience is greatly improved. .

The touch panel technology can distinguish between different types of signals, such as signal generation principle, sensing technology, and screen assembly. According to different signal generation principles, it can be divided into digital and analog: digital touch signals are made of transparent ITO (Indium Tin Oxide) conductive film, and the wires are distributed on the transparent conductive glass in the X and Y directions. The switch is formed at the intersection of the lines, and the touch signal is sensed when pressed; and the difference between the analog touch principle and the digital type is that a dot spacer is disposed between the upper and lower layers, and the upper and lower electrodes are turned on after the touch. The signal of the potential difference is transmitted to the controller through the circuit to process and calculate the coordinate position of the touch point. Furthermore, touch panel technology can be divided into electrical signals (including resistive, capacitive, electromagnetic, etc.), optical signals (including infrared, etc.), and audio signals (depending on sensing technology, manufacturing technology, and process technology). Including surface acoustic wave type, acoustic waveguide type, dispersion signal type, acoustic pulse type, etc.).

However, regardless of the form of the touch panel technology described above, the sensitivity of the touch is one of the important factors affecting the performance of the device. In view of this, there is an urgent need to develop a touch display device in order to improve touch performance.

The main purpose of the disclosure is to provide a touch display panel, wherein the touch electrodes and the touch signal lines are disposed on different substrates, thereby shortening the distance between the touch electrodes and the touch objects (eg, the user's fingers). , thereby improving the signal to noise ratio.

In addition, another object of the present disclosure is to provide a touch display panel, wherein the touch electrodes can be electrically connected to the touch signal lines by using conductive partitions between the two substrates. In addition, another object of the present disclosure is to provide a touch display panel, wherein the touch electrode can be a metal mesh layer, and the touch electrode pattern can at least partially overlap with the black matrix layer, thereby improving the touch electrode. Visibility.

The touch display device of the present disclosure includes: a first substrate; a thin film transistor component disposed on the first substrate; a touch signal line disposed on the first substrate; and a second substrate The display is disposed opposite to the first substrate; the touch electrode is disposed on the side of the second substrate toward the first substrate, wherein the touch electrode is electrically connected to the touch signal line; and a display layer is disposed Between the first substrate and the second substrate.

According to some embodiments, the touch display device has a display area and a non-display area, the non-display area is disposed around the display area, and the touch display device further includes a conductive partition located on the first substrate and the first The two substrates are electrically connected to the touch signal line.

According to some embodiments, the conductive partition may include a gap unit; wherein the gap unit may be a conductive gap unit.

According to some embodiments, the electrically conductive partitions may be electrically conductive particles that are located within a package unit of the non-display area.

According to some embodiments, the touch electrode may be disposed on the surface of the gap unit to form a touch contact portion; and the conductive partition portion includes the touch contact portion on the surface of the gap unit.

In one embodiment of the present disclosure, the touch display device may further include a first conductive layer between the touch signal line and the touch electrode and electrically connected to the touch signal line.

According to some embodiments, the touch display device further includes: a first insulating layer disposed between the thin film transistor element and the touch signal line; and a second insulating layer disposed on the touch signal line and the first Between a conductive layer. The first conductive layer is electrically connected to the touch signal line through a touch contact hole located in the second insulating layer.

According to some embodiments, the first conductive layer is electrically connected to the thin film transistor element through a contact hole for a pixel signal.

According to some embodiments, the touch display device may further include: a second conductive layer disposed on the thin film transistor element, wherein the second conductive layer is electrically insulated from the touch signal line and the first conductive layer. The second conductive layer is electrically connected to the thin film transistor through a contact hole for a pixel signal.

According to some embodiments, the touch electrode can be a transparent conductive layer. According to some embodiments, the touch electrode can be a metal grid.

According to some embodiments, the display layer is a negative liquid crystal layer.

According to some embodiments, the touch electrode has an opening, and one of the touch electrode portions is defined by the opening.

According to some embodiments, the touch display device may further include a plurality of scan lines arranged along a first direction and a plurality of data lines arranged along a second direction, disposed on the first substrate; wherein the touch electrode portion And at least partially overlapping at least one of the scan lines and the data lines.

According to some embodiments, a black matrix layer is further disposed on the second substrate, and the touch electrode portion at least partially overlaps the black matrix layer.

According to some embodiments, the touch display device may further include a package unit located in the non-display area, wherein the conductive partition is a conductive particle, and the conductive particles are located in the package unit.

In a general in-cell touch display device, the touch electrodes and the touch signal lines are disposed on the same side substrate, so that the distance between the touch electrodes and the touch object is relatively long, and the difference in capacitance values before and after the touch is small. It is easy to be affected by noise, resulting in poor signal to noise. According to some embodiments of the present disclosure, the touch electrodes are disposed on the second substrate, and the touch signal lines are disposed on the first substrate, and the touch signal lines are electrically connected to the touch electrodes through the conductive partitions. This can shorten the distance between the touch electrode and the touch object. Therefore, when a touch object touches the touch display device of the present disclosure, the distance between the touch electrode and the touch object is relatively close, thereby improving the problem of the general in-cell touch display device.

1‧‧‧Touch Processing Unit

11‧‧‧First substrate

121‧‧‧ gate

122‧‧‧First common drive electrode

13‧‧‧ gate insulation

14‧‧‧Semiconductor layer

151‧‧‧ source bungee layer

151a‧‧‧ contact hole for pixel electrodes

152‧‧‧second common drive electrode

152a‧‧‧ Common electrode signal contact hole

151D‧‧‧汲

151S‧‧‧ source

16‧‧‧Insulation

17‧‧‧flat layer

18‧‧‧Second conductive layer

19‧‧‧First insulation

20,68‧‧‧Touch signal line

20’‧‧‧Virtual Touch Signal Line

21‧‧‧Second insulation

221‧‧‧Common electrode

222‧‧‧Touch signal pad

222a‧‧‧Touch contact hole

222b‧‧‧virtual contact hole

223‧‧‧ pixel electrodes

31‧‧‧second substrate

32‧‧‧Black matrix layer

33‧‧‧Color filter layer

34‧‧‧Protective layer

321‧‧‧Black matrix opening

35‧‧‧Gap unit

36A, 36B, 36C‧‧‧ touch electrodes

360‧‧‧First conductive layer

361A, 361B, 361C‧‧‧ openings

362A, 362B, 362C‧‧‧ Touch electrode

4‧‧‧ display layer

54‧‧‧Touch electrode

541‧‧‧Touch signal line

542‧‧‧Touch electrode

543‧‧‧Induction electrode

61‧‧‧ polarizer

62‧‧‧Adhesive layer

63‧‧‧Protected substrate

64‧‧‧Electrical pads

65‧‧‧Package unit

66‧‧‧Electrical particles

7D‧‧‧Display Processing Unit

7T‧‧‧ touch processing unit

736‧‧‧Touch Contact

8‧‧‧Processing unit

AA‧‧‧ display area

B‧‧‧Non-display area

BM1‧‧‧First Shading Department

BM2‧‧‧second shade

D‧‧‧ data line

S‧‧‧ scan line

First time of T1‧‧

T2‧‧‧ second period

TFT‧‧‧thin film transistor components

1 is a plan view of a touch display device according to Embodiment 1 of the present disclosure.

2 is a schematic cross-sectional view of a touch display device according to Embodiment 1 of the present disclosure.

3 is a cross-sectional view of a touch display device according to Embodiment 2 of the present disclosure.

4 is a cross-sectional view of a touch display device according to Embodiment 3 of the present disclosure.

FIG. 5 is a cross-sectional view of a touch display device according to Embodiment 4 of the present disclosure.

FIG. 6 is a timing chart of driving of one of the touch display devices of Embodiments 1 to 4.

FIG. 7 is another timing chart of driving of the touch display device of Embodiments 1 to 4.

8 is a top plan view of a touch display device according to Embodiment 5 of the present disclosure.

9 is a cross-sectional view of a touch display device according to Embodiment 5 of the present disclosure.

FIG. 10 is a cross-sectional view of a touch display device according to Embodiment 6 of the present disclosure.

FIG. 11 is a timing chart of driving of one of the touch display devices of Embodiments 5 to 6.

12A to 12C are schematic diagrams of touch electrodes suitable for the touch display devices of Embodiments 1 to 6 of the present disclosure.

Figure 12D is a schematic diagram showing scan lines, data lines, and black matrix layers corresponding to one touch electrode.

FIG. 13 is a cross-sectional view of a touch display device according to Embodiment 7 of the present disclosure.

FIG. 14 is a top plan view of a touch electrode in a touch display device according to Embodiment 7 of the present invention.

FIG. 15 is a schematic diagram showing the setting of a touch electrode in the touch display device according to Embodiment 7 of the present disclosure.

FIG. 16 is a schematic diagram showing the arrangement of touch electrodes in the touch display device according to Embodiment 8 of the present disclosure.

17 and 18 are schematic diagrams showing the arrangement of touch processing units of the touch display devices of Embodiments 7 to 8 of the present disclosure.

19 and 20 are diagrams showing the results of measuring the transmittance of the touch display device of the seventh embodiment in combination with the positive and negative liquid crystals.

21 is a schematic cross-sectional view of a touch display device of a comparative example.

The embodiments of the present disclosure are described by way of specific examples, and those skilled in the art can readily appreciate the other advantages and advantages of the disclosure. The disclosure may also be implemented or applied by other different embodiments. The details of the present specification may also be applied to various aspects and applications, and various modifications and changes may be made without departing from the spirit of the present invention.

Furthermore, the use of ordinal numbers such as "first", "second", and the like, as used in the specification and the claims, to modify the elements of the claim, does not mean, and does not mean that the claim element has any preceding ordinal number. Nor does it represent the order of a request element and another request element, or the order of the manufacturing method. The use of these numbers is only used to enable a request element with a certain name to be the same as another request element with the same name. Make a clear distinction.

Example 1

FIG. 1 is a top plan view of the touch display device of the embodiment. According to the embodiment, the touch display device of the present disclosure is a self-capacitive in-cell touch display device, comprising: a touch electrode 36 and a touch signal line 20, wherein the touch electrode 36 is located on the second substrate (FIG. On the inner side of the unillustrated, the touch signal line 20 is located on the inner side of the first substrate (not shown). The touch electrode 36 is electrically connected to the touch signal line 20 through the touch contact hole 222 a. Therefore, the signal output by the touch processing unit 1 can be transmitted from the touch signal line 20 to the touch electrode 36 through the touch contact hole 222a. When a user touches the touch display panel, the touched position A corresponding change in the capacitance of the touch electrode 36 is generated, and the change in the capacitance value can be transmitted back to the touch signal line 20 through the touch contact hole 222a; by comparing the change of the signal before and after the user touches And can determine where the user touched. According to some embodiments, the touch display device can be self-contained, and the touch processing unit 1 can perform the functions of transmitting signals, receiving signals, and processing signals. Or, according to some embodiments, the touch display device can be a mutual capacitive type, and the touch processing unit can be configured to include two different processing units for transmitting signals and receiving signals respectively, or the touch processing unit can be a A separate integrated processing unit that transmits signals and receives signals simultaneously. In addition, as shown in FIG. 1 , the touch display panel of the present embodiment further includes a separation unit 35 corresponding to the partial touch contact hole 222 a; the function of the separation unit 35 will be described in detail in the following paragraphs. Furthermore, the touch display device of the present embodiment can selectively set the virtual touch signal line 20' and the virtual contact hole 222b in addition to the touch control signal line 20 and the touch contact hole 222a. The visibility of the touch signal line 20 and the touch contact hole 222a is reduced. Here, only the touch electrodes 36 of 3×4 are used for description; however, the number and arrangement of the touch electrodes of the present disclosure are not limited thereto. Each of the touch electrodes 36 is connected to the touch processing unit 1 for at least one touch signal line 20 for transmitting touch signals.

2 is a schematic cross-sectional view of the touch display device of the embodiment. As shown in FIG. 2, in the method of fabricating the touch display device of the present embodiment, first, a first substrate 11 is provided. Then, a patterned first metal layer is formed on the first substrate 11, and includes a gate 121 and a first common driving electrode. a gate insulating layer 13 is formed on the gate 121, the first common driving electrode 122, and the first substrate 11, and the gate insulating layer 13 is patterned to expose the first common driving electrode 122; and the gate insulating layer 13 A patterned semiconductor layer 14 is formed thereon, wherein the semiconductor layer 14 is disposed corresponding to the gate electrode 121; and a patterned second metal layer is formed on the semiconductor layer 14 and the gate insulating layer 13, and includes a source drain layer 151. And the second common driving electrode 152, wherein the second common driving electrode 152 is electrically connected to the first common driving electrode 122; thus, the thin film transistor element TFT fabrication on the first substrate 11 of the embodiment is completed. The source drain layer 151 includes a source 151S and a drain 151D. In the present embodiment, the following gate TFT is taken as an example, and those skilled in the art know that an upper gate TFT can also be used.

Then, an insulating layer 16 and a flat layer 17 are sequentially formed on the thin film transistor element TFT and the second common driving electrode 152, and the insulating layer 16 and the flat layer 17 are patterned to expose the source drain layer 151 as a follow-up. The thin film transistor element TFT and the pixel electrode are connected.

Then, a second conductive layer 18 is formed on the planar layer 17 and is electrically connected to the source drain layer 151 through a contact hole 151a for a pixel electrode. Therefore, the second conductive layer 18 serves as a pixel. electrode. The second conductive layer 18 can be transparent. Then, a first insulating layer 19 is formed on the second conductive layer 18; and a patterned third metal layer is formed on the first insulating layer 19, which includes the touch signal line 20. Moreover, the third metal layer may also include a virtual touch signal line 20' (as shown in Figure 1), but is not required. The touch signal line 20 and the virtual touch signal line 20' are disposed corresponding to the source drain layer 151. A second insulating layer 21 is formed on the touch signal line 20 and patterned for subsequent connection between the second common driving electrode 152 and the common electrode and the touch signal line 20 and the touch signal pad. Finally, a first conductive layer is formed on the second insulating layer 21, and includes a touch signal pad 222 electrically connected to the touch signal line 20 through a touch contact hole 222a. In addition, the first conductive layer further includes a common electrode 221 that is electrically connected to the second common driving electrode 152 through a common electrode signal contact hole 152a. The first conductive layer can be transparent. Through the foregoing process, the fabrication of the thin film transistor substrate of the present embodiment is completed.

As shown in FIG. 2, another second substrate 31 is provided, above which a black matrix layer 32 is formed first, and then a color filter layer 33 is formed. Next, a protective layer 34 is formed on the color filter layer 33; a gap unit 35 is formed. Then, a touch electrode 36 is formed on the surface of the protective layer 34 and the gap unit 35. Thus, the fabrication of the color filter substrate of the present embodiment is completed. Here, the gap unit 35 may be a conductive gap unit or an insulating gap unit. The gap unit is for maintaining a distance between the first substrate 11 and the second substrate 31, which may be formed using a conductive or insulating photoresist.

Finally, the prepared thin film transistor substrate and the color filter substrate are paired with a display layer 4 interposed therebetween, and the display layer 4 can be a liquid crystal display layer; thus, the implementation is completed. For example, the production of a touch display panel.

In the present embodiment, the first substrate 11 and the second substrate 31 can be made of a base material such as glass, plastic, or a flexible material. The gate insulating layer 13, the insulating layer 16, the flat layer 17, the first insulating layer 19, the second insulating layer 21, and the protective layer 34 may be made of an insulating layer material such as an oxide, a nitride, an oxynitride, or a combination thereof. . The gate 121, the first common driving electrode 122, the source drain layer 151, the second common driving electrode 152, the touch signal line 20, and the virtual touch signal line 20' may be oxidized using a conductive material such as a metal, an alloy, or a metal. Made of materials, metal oxynitrides, or other electrode materials. The semiconductor layer 14 may use amorphous germanium, low temperature polycrystalline germanium, IGZO, or other materials having semiconductor properties. The first conductive layer (which includes the common electrode 221 and the touch signal pad 222 in this embodiment) and the second conductive layer 18 can be made of a transparent conductive electrode material such as ITO, IZO or ITZO. The touch electrode 36 can be made of a transparent material such as ITO, IZO or ITZO. Alternatively, the touch electrode 36 may be a metal mesh made of a metal or a metal alloy. However, in other embodiments of the present disclosure, the materials of the foregoing elements are not limited thereto.

Through the above process, the touch display device in which the common electrode of the embodiment is on the top and the pixel electrode is below is completed. As shown in FIGS. 1 and 2, the touch display device of the present embodiment includes: a first substrate 11; a thin film transistor element TFT disposed on the first substrate 11; and a touch signal line 20 disposed on the first a second substrate 31 is disposed opposite to the first substrate 11; a touch electrode 36 is disposed on the side of the second substrate 31 toward the first substrate 11, wherein the touch electrode 36 and the touch signal The wire 20 is electrically connected; and a display layer 4 is disposed between the first substrate 11 and the second substrate 31. The touch display device of the present embodiment further includes a touch processing unit 1 disposed on the first substrate 11 and providing a touch signal to the touch electrode 36.

As shown in FIG. 2, in the touch display panel of the present embodiment, a first insulating layer 19, a touch signal line 20, a second insulating layer 21, and a first layer are sequentially disposed on the TFT of the thin film transistor element. The conductive layer (including the touch signal pad 222 and the common electrode 221), wherein the first insulating layer 19 is disposed between the TFT and the touch signal line 20, and the second insulating layer 21 is disposed on the touch signal line 20 The touch-sensitive signal pad 222 included in the first conductive layer passes through a touch contact hole 222a located in the second insulating layer to be in contact with the touch panel 222 and the common electrode 221 The signal line 20 is electrically connected. The touch electrode 36 is electrically connected to the touch signal pad 222 of the first conductive layer. In the touch display panel of the embodiment, the gap unit 35 is disposed between the first substrate 11 and the second substrate 31. For example, the gap unit 35 may be formed on the second substrate 31 and protrude toward the first substrate 11 and may be disposed corresponding to the touch contact hole 222a. The touch electrode 36 can be disposed on the surface of the gap unit 35 and located at the protruding portion of the gap unit 35 to form a touch contact portion 736. The touch contact portion 736 serves as a conductive partition and is electrically connected to the touch signal line 20 by direct contact with the touch signal pad 222.

Therefore, as shown in FIG. 1 , when the touch processing unit 1 outputs a touch signal to the touch signal line 20 , the touch signal line 20 can transmit the touch signal to the touch signal pad through the touch contact hole 222 a . Then, as shown in FIG. 2, since the surface of the gap unit 35 is covered with the touch contact portion 736 of the touch electrode 36, the touch signal can be directly contacted with the touch signal pad 222 by the touch contact portion 736 (conductive). The partition is transferred to the touch electrode 36. On the other hand, as shown in FIG. 2, when a user touches the touch display panel of the embodiment, the capacitance value of the touch display panel and the area of the touch electrode 36 can be changed, and the changed capacitance value is more transparent. The touch contact portion 736 of the touch electrode 36 on the gap unit 35 is again transmitted back to the touch signal pad 222 and the touch signal line 20 to detect the touch position of the user.

In the touch display device of the present embodiment, the common electrode 221 and the touch electrode 36 are respectively two different conductive layers. As shown in FIG. 1, the common electrode 221 can be regarded as a full-surface electrode layer on the macroscopic view (microscopically, the common electrode 221 includes a slit that can help the liquid crystal molecules to fall) without being in accordance with the pattern of the touch electrode 36. Changed, so there is no optical or electrical difference due to the center or edge of the touch electrode.

In addition, in the touch display device of the present embodiment, the second conductive layer 18 is disposed on the TFT of the thin film transistor device, the second conductive layer 18 and the touch signal line 20 and the first conductive layer (including the touch signal pad) 222 and the common electrode 221) are electrically insulated. A common driving electrode (ie, a first common driving electrode 122 and a second common driving electrode 152) may be further disposed on the first substrate 11. The second conductive layer 18 is electrically connected to the thin film transistor element TFT through the contact hole 151a of the pixel electrode, so that the second conductive layer 18 serves as a pixel electrode layer; and the common electrode 221 of the first conductive layer Then, the common driving signal contact hole 152a is electrically connected to the common driving electrode (ie, the first common driving electrode 122 and the second common driving electrode 152).

Example 2

3 is a schematic cross-sectional view of the touch display device of the embodiment. The structure, features, and operation modes of the touch display device of the present embodiment are the same as those of the first embodiment, except that the touch electrodes 36 are disposed on the second substrate 31.

As shown in FIG. 3, in the touch display panel of the present embodiment, the touch electrode 36 is disposed between the gap unit 35 and the second substrate 31, and the gap unit 35 is a conductive gap unit, so the touch electrode 36 can be The gap unit 35 is electrically connected to it due to its conductive nature. The gap unit 35 (the conductive gap unit) serves as a conductive partition, and the touch electrode 36 is electrically connected to the touch signal line 20 via the conductive gap unit 35 (conductive partition) and the touch signal pad 222 of the first conductive layer. connection. Therefore, the touch display panel of the embodiment The touch signal can be transmitted to the touch electrode 36 through the conductive gap unit 35 (conductive separation portion) having directivity in contact with the touch signal pad 222.

Example 3

4 is a schematic cross-sectional view of the touch display device of the embodiment. The structure, features and operation modes of the touch display device of the present embodiment are the same as those of the first embodiment, and the difference lies in the relative positions of the common electrode and the pixel electrode.

As shown in FIG. 2, the touch display panel of Embodiment 1 is a touch display device with a common electrode on top and a pixel electrode on the bottom. As shown in FIG. 4, the touch display panel of the embodiment is a touch display device with a pixel electrode on the top and a common electrode on the bottom.

In more detail, as shown in FIG. 4 , in the touch display panel of the embodiment, the first conductive layer includes a touch signal pad 222 and a pixel electrode 223 . The pixel electrode 223 of the first conductive layer is electrically connected to the thin film transistor element TFT through the contact hole 151a of the pixel electrode; and the second conductive layer 18 is transmitted through the common electrode signal contact hole 152a and the common driving electrode (ie, The first common driving electrode 122 and the second common driving electrode 152 are electrically connected, so that the second conductive layer 18 serves as a common electrode layer.

Example 4

FIG. 5 is a schematic cross-sectional view of the touch display device of the embodiment. The structure, features, and operation modes of the touch display device of the present embodiment are the same as those of the third embodiment, and the difference is the position of the touch electrodes 36 on the second substrate 31.

As shown in FIG. 5, in the touch display device of the present embodiment, the touch electrode 36 is disposed between the gap unit 35 and the second substrate 31, and the gap unit 35 is a conductive gap unit, so the touch electrode 36 can be The touch electrode 36 is electrically connected to the touch signal pad 222 of the first conductive layer via the conductive gap unit 35 (conductive partition). Therefore, in the touch display panel of the present embodiment, the touch signal can be transmitted to the touch electrode 36 through the conductive gap unit 35 (conductive partition) that is in direct contact with the touch signal pad 222.

FIG. 6 is a timing chart of driving of one of the touch display devices of the foregoing embodiments 1 to 4. When the touch display device of the foregoing embodiments 1 to 4 displays a picture in a time segment, the time segment is divided into a first time period T1 and a second time period T2, and the first time period T1 is used for the display operation. The second time period T2 is used for the touch operation. As shown in FIG. 2 to FIG. 6 , the touch signal line 20 can provide a floating signal, a common signal or a ground signal during the first time period T1 and provide a touch signal during the second time period T2, and the common electrode ( The first common driving electrode 122 and the second common driving electrode 152) may each provide a common signal during the first time period T1 and the second time period T2.

FIG. 7 is another timing chart of driving of the touch display device according to the first embodiments of the present invention, wherein the driving timings of FIGS. 6 and 7 are similar except for the common driving electrode (which may include the first common driving electrode 122 and the The second common driving electrode 152, as shown in FIGS. 2 to 5, provides a reference signal during the first time period T1 and a touch signal during the second time period T2.

In the touch display device of Embodiments 1 to 4 shown in FIG. 1 to FIG. 7, the display panel portion is a horizontal alignment display panel, such as an in-plane switching (IPS) display panel and a fringe field switch ( Fringe field switching (FFS) display panel, or other.

Example 5

8 and 9 are a plan view and a cross-sectional view, respectively, of the touch display device of the present embodiment. The structure, features, and operation modes of the touch display device of the present embodiment are the same as those of the third embodiment, and the difference lies in the position of the common electrode.

As shown in FIG. 4, the touch display device of the third embodiment includes a second conductive layer 18 electrically connected to the common driving electrode (ie, the first common driving electrode 122 and the second common driving electrode 152) through a common electrode signal contact hole 152a. The second conductive layer 18 is connected as a common electrode layer.

As shown in FIG. 9 , the touch display device of the present embodiment does not include the second conductive layer on the first substrate 11 , and the common electrode layer and the touch electrode may be the same conductive layer 36 . On the substrate 31. Therefore, the display panel portion of the touch display device of the embodiment may be vertically aligned. A display panel such as a twisted nematic (TN) display panel, a vertical alignment (VA) display panel, or the like.

Example 6

FIG. 10 is a schematic cross-sectional view of the touch display device of the embodiment. The structure, features, and operation modes of the touch display device of the present embodiment are the same as those of the fifth embodiment, and the difference is the position of the touch electrodes 36 on the second substrate 31.

As shown in FIG. 10 , in the touch display device of the present embodiment, the touch electrode and the common electrode layer are the same common conductive layer 36 , and are disposed between the gap unit 35 and the second substrate 31 , and the gap unit 35 As a conductive gap unit, the touch electrode 36 can be electrically connected to the gap unit 35 due to its conductive properties. Therefore, in the touch display panel of the present embodiment, the touch signal can be transmitted to the touch electrode 36 through the gap unit 35 (conductive partition) that is in direct contact with the touch signal pad 222.

FIG. 11 is a timing chart of driving of one of the touch display devices of the foregoing embodiments 5-6. When the touch display device of the foregoing embodiments 5 to 6 displays a picture in a time segment, the time segment is divided into a first time period T1 and a second time period T2, and the first time period T1 is used for the display operation. The second time period T2 is used for the touch operation. As shown in FIG. 8 to FIG. 11 , the touch signal line 20 provides a reference signal during the first time period T1 and a touch signal during the second time period T2.

As shown in FIG. 1 to FIG. 5 and FIG. 8 to FIG. 10, each touch electrode 36 is shown as a complete plane. When the touch electrode 36 is a complete plane, a strong touch signal can be generated. However, the disclosure is not limited to this.

12A to 12C are schematic diagrams of touch electrodes suitable for the touch display devices of Embodiments 1 to 6 of the present disclosure. Here, the touch display device of the first embodiment will be described. 12D is a schematic diagram showing scan lines, data lines, and black matrix layers corresponding to one touch electrode; here, for the sake of clarity and conciseness, the touch electrodes, scan lines, data lines, and black matrix are only drawn in the figure. The layer, as for the components on the other first substrate, is omitted. Referring to FIG. 12D, the touch display device includes a plurality of edges A data line D extending in the first direction (Y direction) and a plurality of scanning lines S extending in the second direction (X direction) are disposed on the first substrate 11. The first direction and the second direction are different, for example, may be vertical. The gate 121 (shown in FIG. 2) on the first substrate 11 is electrically connected to the scan line S, and the source 151S (shown in FIG. 2) in the source drain layer 151 is electrically connected to the data line D. Sexual connection. Furthermore, the black matrix layer 32 (shown in FIG. 2) disposed on the second substrate 31 includes a first light blocking portion BM1 in a first direction (Y direction), the position corresponding to the data line D; the second direction (X) The second light blocking portion BM2 of the direction corresponds to the scanning line S; and the black matrix opening 321 defining the first and second light blocking portions. As shown in FIG. 2, the touch electrodes on the second substrate 31 may have different patterns in addition to the aforementioned pattern having a complete plane. The touch electrode may have an opening, and one of the touch electrode portions defined by the opening. The position of the touch electrode portion can be set corresponding to the scan line and the data line. The touch electrode portion may at least partially overlap with at least one of the scan line S and the data line D. Furthermore, the black matrix layer 32 disposed on the second substrate 31 generally has a position corresponding to the scan line and the data line on the first substrate 11. Therefore, according to some embodiments of the present invention, the touch electrode portion may be disposed corresponding to the black matrix layer, for example, at least partially overlapping the black matrix layer. For example, the touch electrode portion may at least partially overlap the black matrix layer BM1 in the first direction, or at least partially overlap the black matrix layer BM2 in the second direction, or at least partially overlap the BM1 and BM2 at the same time.

In detail, for example, as shown in FIGS. 12A and 12D, the touch electrode 36A has a plurality of openings 361A (slits) extending in the second direction (X direction), and defines a plurality of second directions along the second direction. The touch electrode portion 362A (strip pattern) extending in the (X direction). The touch electrode pattern 362A may be disposed corresponding to the scan line S (extending in the second direction), and at least partially overlap the scan line S, and may at least partially overlap the black matrix layer BM2 in the second direction. For example, as shown in FIG. 12B, the touch electrode 36B has a plurality of openings 361B (slits) extending in the first direction (Y direction), and defines a plurality of touch electrodes extending in the first direction (Y direction). Part 362B (strip pattern). The touch electrode pattern 362B may be disposed corresponding to the data line (extending in the first direction), and at least partially overlap the data line, and may at least partially overlap the black matrix layer in the first direction. For another example, as shown in FIG. 12C, the touch electrode 36C has a plurality of matrix arrangements. The port 361C defines a grid-shaped touch electrode portion 362C. The arrangement of the touch electrode portions 362C can correspond to the arrangement of the scan lines and the data lines. That is, the touch electrode portion 362C may be disposed corresponding to the scan line and the data line, and at least partially overlap the scan line and the data line, and may at least partially overlap with the black matrix layer of the first direction and the second direction.

When the touch electrode 36 has the pattern as shown in FIG. 12A to FIG. 12C, the touch electrode portion is disposed corresponding to the scan line and/or the data line and the black matrix layer 32, so that the electric field of the touch electrode portion is prevented from affecting the liquid crystal rotation. Improve display quality. In addition, if the touch electrode 36 has a pattern as shown in FIGS. 12A to 12C , since the pattern of the touch electrode portion of the touch electrode 36 can be shielded by the black matrix layer 32 due to the corresponding arrangement with the black matrix layer 32, the touch The material of the electrode 36 is not limited to the aforementioned transparent conductive material, and may be a metal mesh.

Example 7

FIG. 13 is a schematic cross-sectional view of the touch display device of the embodiment. The manufacturing process of the thin film transistor element TFT on the first substrate 11 is the same as that of the previous embodiment, and the manufacturing process of the black matrix layer 32 and the color filter layer 33 on the second substrate 31 is the same as that of the previous embodiment; This will not be repeated here.

In addition, in this embodiment, a polarizing plate 61, an adhesive layer 62 (for example, an optical adhesive), and a protective substrate 63 are stacked on the outer side of the second substrate 31; however, the disclosure is not limited thereto. Moreover, the above components may be selectively stacked on the outer side of the second substrate 31 of the foregoing embodiment.

As shown in FIG. 13 , the touch display panel of the present embodiment includes: a first substrate 11 having a thin film transistor element TFT disposed thereon; a second substrate 31 disposed opposite to the first substrate 11 and a touch The electrode 54 is disposed on the side of the second substrate 31 toward the first substrate 11; and a display layer 4 is sandwiched between the first substrate 11 and the second substrate 31.

FIG. 14 is a top plan view of a touch electrode in the touch display device of the embodiment. The touch electrode 54 includes a touch signal line 541 , a touch electrode 542 , and a sensing electrode 543 . Here, only one possible touch signal line 541, the touch electrode 542, and the sensing electrode 543 are arranged, but the disclosure is not Limited to this. The touch electrode 54 in the touch display panel of the embodiment is a metal mesh layer. FIG. 14 illustrates a mutual-capacitive touch display device, but the invention is not limited thereto. Alternatively, according to some embodiments, the touch electrodes 54 may also be arranged in a manner as described above with respect to the touch electrodes 36, such that the touch display device is self-contained. Each touch electrode 36 can also be a metal grid pattern.

FIG. 15 is a schematic diagram showing the setting of a touch electrode in the touch display device of the embodiment. In the touch display device of the present embodiment, the touch electrode 54 is disposed corresponding to the black matrix layer 32; more specifically, the touch electrode 54 is disposed between the black matrix layer 32 and the second substrate 31. It is embedded in the black matrix layer 32. In addition, in order to further reduce the visibility of the touch electrode 54 , a blackening layer (eg, an oxidized metal layer or an alloy) may be formed on the surface of the touch electrode 54 , particularly toward the surface of the second substrate 31 .

Example 8

FIG. 16 is a schematic diagram showing the setting of a touch electrode in the touch display device of the embodiment. The structure, features, and operation modes of the touch display device of the present embodiment are the same as those of the seventh embodiment, and the difference is the position of the touch electrodes 54. In the embodiment, the touch electrodes 54 are disposed directly under the black matrix layer 32 , and the black matrix layer 32 is disposed between the touch electrodes 54 and the second substrate 31 . In this way, the visibility of the touch electrode 54 can be reduced and the problem of water ripples can be solved.

In the touch display device of the seventh embodiment, the touch processing unit of the touch electrode is not particularly limited, and may be disposed on the first substrate or the second substrate. FIG. 17 is a schematic diagram showing the arrangement of a touch processing unit applicable to the touch display devices of Embodiments 7 to 8. The touch processing unit 7T of the touch display device is disposed on the second substrate 31 and provides a touch signal to the touch electrode 54 (as shown in FIGS. 15 and 16); and the components on the first substrate 11 are It is driven by another display processing unit 7D disposed on the first substrate 11.

Alternatively, FIG. 18 is another schematic diagram of a touch processing unit applicable to the touch display devices of Embodiments 7 to 8. A thin film transistor element (not shown) may be disposed on the first substrate 11. For the reference to the foregoing embodiments, details are not described herein. The second substrate 31 may be provided with a black matrix layer and color Filter layer (not shown), which will not be described here. Furthermore, a processing unit 8 and a touch signal line 68 are disposed on the first substrate 11. In detail, the touch display device includes a display area AA and a non-display area B. The non-display area B is disposed around the display area AA, and the processing unit 8 and the touch signal line 68 are disposed on the non-display area B. The touch electrode 54 (shown in FIGS. 15 and 16) is located in the display area AA. The touch electrodes 54 located in the display area AA are electrically connected to the conductive pads 64 located in the non-display area B. A package unit 65 is located on the non-display area B and located between the first substrate 11 and the second substrate 31. The encapsulating unit 65 includes a conductive particle 66; and the conductive particle 66 can be exemplified by a gold ball. The conductive particles 66 are electrically connected to the touch signal line 68 as a conductive partition. The processing unit 8 on the first substrate 11 is connected to the second substrate 31 via the touch signal line 68, the conductive particles 66 (conductive separation portion), and the conductive pads 64 on the second substrate 31. Electrodes 54 (shown in Figures 15 and 16) are electrically connected. The processing unit 8 can be a flexible circuit board, or an integrated circuit (IC). Alternatively, processing unit 8 may include a flexible circuit board and an integrated circuit (IC). The processing unit 8 can be a touch processing unit. The signal of the processing unit 8 on the first substrate 11 can be transmitted to the touch electrodes 54 on the second substrate 31 through the conductive particles 66 and the conductive pads 64 (as shown in the figure). 15 and 16). According to some embodiments, the processing unit can simultaneously have the functions of touch processing and display processing, and is an integrated processing unit. Alternatively, according to some embodiments, the touch processing unit and the display processing unit are separate processing units, which are all disposed on the first substrate 11. According to some embodiments, the touch processing unit and the display processing unit may be disposed on the same circuit board (eg, the flexible circuit board FPC) located on the first substrate 11, and the FPC may be saved.

Herein, the touch display device of the seventh embodiment is used in combination with the positive and negative liquid crystals to measure the transmittance of the touch display device; the results are shown in FIGS. 19 and 20, respectively. In FIGS. 19 and 20, P-ref and N-ref respectively indicate the transmittances of the positive and negative liquid crystals, and 0V, 1V, 3V, 5V, -1V, -3V, and -5V are respectively The voltage applied by the touch electrode. The results show that the voltage applied to the touch electrode has a greater influence on the transmittance of the positive liquid crystal, and has less influence on the transmittance of the negative liquid crystal. The results show that the touch display devices of Embodiments 7 to 8 are preferably compatible with the negative liquid crystal. In addition to increasing the touch sensitivity, there is no case where the transmittance is lowered.

Comparative example

21 is a schematic cross-sectional view of a touch display device of a comparative example. The structure of the touch display device of the comparative example is similar to that of the first embodiment, and the difference is the position of the touch electrode 36.

As shown in FIG. 2 , the touch electrode 36 of the first embodiment is disposed on the second substrate 31 , and the first conductive layer includes the touch signal pad 222 and the common electrode 221 . However, as shown in FIG. 21, the touch electrode of the comparative example is not disposed on the second substrate 31, but the first conductive layer 360 includes a touch electrode and a common electrode.

Therefore, the touch display panel of the first conductive layer 360 of the comparative example and the touch signal line 20 are disposed on the same side substrate (ie, the first substrate 11). Therefore, the distance between the touch electrodes of the first conductive layer 360 and the touch object is relatively long, and the difference in capacitance values before and after the touch is small, which is easily affected by noise, resulting in poor signal to noise. In contrast, in the touch display panel of the first embodiment, the touch electrodes 36 are disposed on the second substrate 31, and the touch signal lines 20 are disposed on the first substrate 11, and the touch signal lines 20 are connected by the conductive partitions 736. The touch electrodes 36 are electrically connected, so that the distance between the touch electrodes 36 and the touch object can be shortened. Therefore, when a touch object touches the touch display device of the first embodiment, the touch electrode 36 is closer to the touch object, thereby improving the problem of the touch display panel of the comparative example. In addition, the touch display panel of the first embodiment does not use the second substrate 31 to form the metal lines for the touch electrodes 36 and the connection process with the metal lines, thereby improving the product yield and reducing the manufacturing cost.

The touch display panel of the first embodiment and the touch display panel of the comparative example have similar advantages, so that the touch display panel of the second embodiment has similar advantages as the touch display panel of the comparative example. I will not repeat them here.

In addition, in the disclosure, the color filter layer is disposed on the second substrate; however, the color filter layer may also be disposed on the first substrate, and at this time, the first substrate and above The components can form a color filter on array (COA) integrated with a color filter array.

Furthermore, the touch display device manufactured by the foregoing embodiments can be applied to any electronic device known in the art that needs to display a screen, such as a display, a mobile phone, a notebook computer, a camera, a camera, a music player. , mobile navigation devices, televisions and other electronic devices that need to display images.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

11‧‧‧First substrate

121‧‧‧ gate

122‧‧‧First common drive electrode

13‧‧‧ gate insulation

14‧‧‧Semiconductor layer

151‧‧‧ source bungee layer

151a‧‧‧ contact hole for pixel electrodes

152‧‧‧second common drive electrode

151D‧‧‧汲

151S‧‧‧ source

152a‧‧‧ Common electrode signal contact hole

16‧‧‧Insulation

17‧‧‧flat layer

18‧‧‧Second conductive layer

19‧‧‧First insulation

20‧‧‧Touch signal line

21‧‧‧Second insulation

221‧‧‧Common electrode

222‧‧‧Touch signal pad

222a‧‧‧Touch contact hole

31‧‧‧second substrate

32‧‧‧Black matrix layer

33‧‧‧Color filter layer

34‧‧‧Protective layer

35‧‧‧Separate unit

36‧‧‧Touch electrode

4‧‧‧ display layer

736‧‧‧Touch Contact

TFT‧‧‧thin film transistor components

Claims (17)

A touch display device includes: a first substrate; a thin film transistor component disposed on the first substrate; a touch signal line disposed on the first substrate; a second substrate, and the first The touch-electrode is disposed on one side of the second substrate toward the first substrate, wherein the touch electrode is electrically connected to the touch signal line; and a display layer is disposed on the first Between the substrate and the second substrate. The touch display device of claim 1, wherein the touch display device has a display area and a non-display area, the non-display area is disposed around the display area; wherein the touch display device further comprises a conductive The partitioning portion is located between the first substrate and the second substrate and electrically connected to the touch signal line. The touch display device of claim 2, wherein the conductive partition further comprises a gap unit. The touch display device of claim 3, wherein the conductive partition comprises a conductive gap unit. The touch display device of claim 3, wherein the touch electrode is disposed on a surface of the gap unit to form a touch contact portion; wherein the conductive partition portion comprises the surface on the surface of the gap unit Touch contact. The touch display device of claim 1, further comprising a first conductive layer between the touch signal line and the touch electrode and electrically connected to the touch signal line. The touch display device of claim 6, further comprising: a first insulating layer disposed between the thin film transistor element and the touch signal line; a second insulating layer is disposed between the touch signal line and the first conductive layer, wherein the first conductive layer passes through a touch contact hole located in the second insulating layer to contact the touch signal line Electrical connection. The touch display device of claim 7, wherein the first conductive layer is electrically connected to the thin film transistor through a contact hole for a pixel signal. The touch display device of claim 7, further comprising: a second conductive layer disposed on the thin film transistor, wherein the second conductive layer and the touch signal line and the first conductive Layer electrical insulation. The touch display device of claim 9, wherein the second conductive layer is electrically connected to the thin film transistor through a contact hole for a pixel signal. The touch display device of claim 1, wherein the touch electrode is a transparent conductive layer. The touch display device of claim 1, wherein the touch electrode is a metal mesh. The touch display device of claim 12, wherein the display layer is a negative liquid crystal layer. The touch display device of claim 1, wherein the touch electrode has an opening, and one of the touch electrode portions is defined by the opening. The touch display device of claim 14, further comprising a plurality of scanning lines arranged along a first direction and a plurality of data lines arranged along a second direction, disposed on the first substrate; The touch electrode portion at least partially overlaps at least one of the scan lines and the data lines. The touch display device of claim 14, wherein a black matrix layer is further disposed on the second substrate, and the touch electrode portion at least partially overlaps the black matrix layer. The touch display device of claim 2, further comprising a package unit located in the non-display area, wherein the conductive partition is a conductive particle, and the conductive particle is located in the package unit.