TW201401135A - In-cell touch display panel - Google Patents

Abstract

An in-cell touch display panel includes an array substrate, a counter substrate, a capacitive touch sensor array and a first guard pattern. The array substrate has a display region, and a peripheral region surrounding the display region. The counter substrate and the array substrate are disposed oppositely. The counter substrate has an inner surface facing the array substrate, a sensor region, and a peripheral region surrounding the sensor region. The capacitive touch sensor array is disposed on the inner surface and in the sensor region of the counter substrate. The first guard pattern is disposed on the inner surface and in the peripheral region of the counter substrate, and the first guard pattern is electrically disconnected from the capacitive touch sensor array.

Description

In-line touch display panel

The present invention relates to an in-cell touch display panel, and more particularly to an in-cell touch display panel in which a protective pattern is disposed on a counter substrate.

Touch panels have been widely used in the input interface of electronic devices because of their human-computer interaction characteristics. In recent years, as the application of consumer electronic products has become more and more widespread, more and more applications have been combined to form touch display devices by combining touch panels and displays, including mobile phones and satellite navigation. System (GPS navigator system), tablet PC (tablet PC), and laptop (laptop PC).

The technology development of touch panels is very diverse. Among them, capacitive touch panels have become the medium and high-end consumer electronics products due to their high accuracy, multi-touch, high durability and high touch resolution. The mainstream touch technology. In addition, regarding the integrated touch display panel, it can be divided into two types according to the degree of integration of the touch element and the display panel. The type of the touch component is formed on the outer surface of the display panel (generally referred to as an on-cell touch display panel), and the integration is low and the thickness is large; the touch component is directly formed in the display panel. The type of surface (generally referred to as an in-cell touch display panel) has a high degree of integration and a small thickness. Since the touch component of the in-cell touch display panel is directly processed on the inner surface of the display panel, during the process Or it may be damaged by static electricity damage due to unpredictable factors. This is a problem to be solved in the design of the in-cell touch display panel.

One of the objects of the present invention is to provide an in-cell touch display panel to enhance the electrostatic protection capability.

A preferred embodiment of the present invention provides an in-cell touch display panel including an array substrate, a pair of substrates, a capacitive touch sensing array, and a first guard pattern. The array substrate has a display area, and a peripheral area surrounds the display area. The opposite substrate is disposed opposite to the array substrate, wherein the opposite substrate has an inner surface facing the array substrate, and the opposite substrate has a sensing region, and a peripheral region surrounds the sensing region. The capacitive touch sensing array is disposed on the inner surface of the opposite substrate and located in the sensing region. The first protection pattern is disposed on the inner surface of the opposite substrate and located in the peripheral region of the opposite substrate, wherein the first protection pattern is electrically separated from the capacitive touch sensing array.

The inner surface of the opposite substrate of the in-cell touch display panel of the present invention is provided with a protective pattern to provide electrostatic protection capability to prevent the in-cell touch display panel from being damaged by electrostatic damage due to unpredictable factors.

The present invention will be further understood by those skilled in the art to which the present invention pertains. The contents of the invention and the effects to be achieved are clarified.

Please refer to Figures 1 to 3. 1 to 3 are schematic views of an in-cell touch display panel according to a first preferred embodiment of the present invention, wherein FIG. 1 is a cross-sectional view of the in-cell touch display panel, and FIG. The figure shows a schematic view of the opposite substrate of the in-cell touch display panel, and FIG. 3 is a schematic view of the array substrate of the in-cell touch display panel. As shown in FIG. 1 to FIG. 3 , the in-cell touch display panel 10 of the present embodiment includes an array substrate 20 , a pair of substrates 30 , a display medium layer 40 , and a capacitive touch sensing array 32 . And a first protective pattern (or referred to as a first static electricity protection pattern) 34. The array substrate 20 has a display area 20D, and a peripheral area 20P surrounds the display area 20D. A display array 28 is disposed in the display area 20D of the array substrate 20, and may include components such as a gate line, a data line, a pixel electrode, a thin film transistor, and a storage capacitor (not shown). The opposite substrate 30 is disposed opposite to the array substrate 20, and the opposite substrate 30 has an inner surface 30A facing the array substrate 20, and the array substrate 20 has an inner surface 20A facing the opposite substrate 30. The opposite substrate 30 has a sensing region 30S, and a peripheral region 30P surrounds the sensing region 30S. The opposite substrate 30 may be provided with a color filter, a black matrix layer, a common electrode, a photoresist spacer, and an alignment bump (not shown). The capacitive touch sensing array 32 is disposed on the inner surface 30A of the opposite substrate 30 and located in the sensing region 30S. The in-cell touch display panel 10 of the present embodiment is an example of a touch liquid crystal display panel. Therefore, the display medium layer 40 is a liquid crystal layer disposed between the array substrate 20 and the opposite substrate 30. The in-cell touch display panel 10 is not limited to a touch liquid crystal display panel, and may be other types of touch display panels, such as a touch organic light emitting diode display panel. In addition, the capacitive touch sensing array 32 is one-dimensional (one Dimensional touch sensing array, but not limited to this. For example, the capacitive touch sensing array 32 can also be a two dimensional touch sensing array, and the two-dimensional touch sensing array can be formed by a single layer conductive pattern or multiple layers of conductive patterns. The capacitive touch sensing array 32 includes a plurality of sensing pads 32P, and a plurality of trace lines 33 disposed on the inner surface 30A of the opposite substrate 30 and electrically connected to the corresponding sensing pads 32P, respectively. To pass the sensed touch signal. The first protection pattern 34 is disposed on the inner surface 30A of the opposite substrate 30 and located in the peripheral region 30P. The first protection pattern 34 is electrically separated from the capacitive touch sensing array 32. In this embodiment, the sensing pad 32P and the first shielding pattern 34 of the capacitive touch sensing array 32 are preferably formed by the same layer of patterned conductive layer, but are not limited thereto.

The first protection pattern 34 can have a compensation bias or a grounding function, and the function of the first protection pattern 34 is to improve the electrostatic protection capability of the in-cell touch display panel 10 during or after the process to avoid the capacitive touch sensing array 32. Damaged by electrostatic damage due to unpredictable factors. In addition, in the embodiment, the first guard pattern 34 substantially surrounds the sensing region 30P of the opposite substrate 30, but is not limited thereto. For example, the first guard pattern 34 may also be disposed on one side, two sides or three sides of the sensing region 30P of the opposite substrate 30. In addition, the position, pattern, and number of first guard patterns 34 may vary depending on electrostatic protection capability requirements or other considerations. The in-cell touch display panel 10 further includes a first wire 21, a plurality of second wires 22, a plurality of third wires 23, at least one connecting structure 24, a touch circuit board 26 and a display circuit board 27. The connection structure 24 is disposed between the array substrate 20 and the opposite substrate 30. The first wire 21 is disposed on the peripheral region 20P of the array substrate 20, wherein one end of the first wire 21 is electrically connected to the touch circuit board 26, and the other end is delayed. Extending below the connecting structure 24. On the other hand, the first protection pattern 34 disposed on the inner surface 30A of the opposite substrate 30 can be electrically connected to a transparent wire 35 extending above the connection structure 24, thereby providing a compensation bias provided by the touch circuit board 26. The pressure may be transmitted to the first guard pattern 34 via the first wire 21 and the connection structure 24 in sequence. The first guard pattern 34 is a conductive pattern, such as a metal pattern. In addition, the first protection pattern 34 can also directly extend above the connection structure 24 to be electrically connected to the connection structure 24 . The second wire 22 is disposed on the peripheral region 20P of the array substrate 20, wherein one end of each of the second wires 22 is electrically connected to the touch circuit board 26, and the other end thereof extends below the connection structure 24. In addition, the connection structure 24 is also electrically connected to the wire 33 of the inner surface 30A of the opposite substrate 30. The touch signals sensed by the capacitive touch sensing array 32 can be sequentially connected via the wire 33 and the connection structure 24. The second wire 22 is transferred to the touch circuit board 26. The third wire 23 is disposed on the peripheral region 20P of the array substrate 20, wherein one end of each of the third wires 23 is electrically connected to the display array 28 (gate line or data line), and the other end is electrically connected to the display circuit board 27. The connection is made, whereby the driving signal from the display circuit board 27 can be transmitted to the gate line or the data line through the third wire 23. The material of the first wire 21 may be a conductive material such as a metal or a transparent conductive material, and it may be a single layer structure or a multilayer structure. For example, in the embodiment, the first wire 21 is formed by laminating a metal wire 211 and a transparent wire 212, wherein the metal wire 211 can be connected to the gate line or the data line of the display array 28, for example. Either the same metal pattern is formed, and the transparent conductive line 212 can be composed of, for example, the same transparent conductive pattern as the pixel electrode (not shown). The transparent wire 212 may be superposed only on the metal wire 211 corresponding to the connection structure 24 without being completely overlapped with the metal wire 211. The second wire 22 and the third wire 23 may be formed of the same metal pattern as the first wire 21, but are not limited thereto.

In this embodiment, the connection structure 24 can include a conductive sealant having the dual function of adhering the array substrate 20 and the opposite substrate 30, and electrically transferring. For example, the conductive sealant may be a colloid having conductive particles (eg, gold balls) having an effect of being electrically conductive only in a direction perpendicular to the array substrate 20 and the opposite substrate 30, and thus, in the present embodiment, the first lead 21, the conductive sealant and the first guard pattern 34 partially overlap in a direction perpendicular to the array substrate 20 and the opposite substrate 30, so that the compensation bias provided by the touch circuit board 26 can be sequentially connected via the first wire 21 The conductive sealant is transferred to the first shield pattern 34. Similarly, the second wire 22, the conductive frame glue and the wire 33 partially overlap in the direction perpendicular to the array substrate 20 and the opposite substrate 30, so that the touch signal sensed by the capacitive touch sensing array 32 can be The sequence is transmitted to the touch circuit board 26 via the wire 33, the connection structure 24, and the second wire 22. The connecting structure 24 is not limited to the conductive frame glue. For example, the connection structure 24 can also be other structures having conductive properties, such as conductive bumps. In other variant embodiments, the compensation bias or ground required for the first guard pattern 34 may not be provided by the touch circuit board 26 on the array substrate 20, but by another touch circuit board on the opposite substrate 30. (not shown) provided.

The in-cell touch display panel of the present invention is not limited to the above embodiment. The in-cell touch display panel of the other preferred embodiments and the modified embodiments of the present invention will be sequentially described below, and the same is used in the following embodiments in order to facilitate the comparison of the differences of the embodiments and simplify the description. The symbols are labeled with the same elements, and are mainly described for the differences between the embodiments, and the repeated parts are not described again.

Please refer to Figure 4. FIG. 4 is a schematic diagram of an in-cell touch display panel according to a variation of the first preferred embodiment of the present invention. As shown in FIG. 4 , in the embodiment, the connection structure 24 of the in-cell touch display panel 10 ′ can be a conductive spacer, and includes a spacer 241 and a conductive layer 242 , wherein the spacer 241 (For example, a photoresist spacer) is disposed between the array substrate 20 and the opposite substrate 30, and can maintain a liquid crystal gap between the array substrate 20 and the opposite substrate 30, and the conductive layer 242 is disposed on the surface of the spacer 241. And electrically connected to the first protection pattern 34 through the transparent wire 35, whereby the first protection pattern 34 can be electrically connected to the first wire 21 on the array substrate 20 via the conductive layer 242. The spacers 241 can be formed on the opposite substrate 30, and the conductive layer 242 and the transparent wires 35 can be formed of the same transparent conductive pattern.

Please refer to Figures 5 to 7. 5 to 7 are schematic views of an in-cell touch display panel according to a second preferred embodiment of the present invention, wherein FIG. 5 is a cross-sectional view of the in-cell touch display panel, and FIG. The figure shows a schematic diagram of the opposite substrate of the in-cell touch display panel, and FIG. 7 shows a schematic diagram of the array substrate of the in-cell touch display panel. As shown in FIG. 5 to FIG. 7, the in-cell touch display panel 50 of the present embodiment further includes a second guard pattern (or referred to as a second static electricity protection pattern) 29, which is different from the first preferred embodiment. The second guard pattern 29 is electrically connected to the first guard pattern 34 via the connection structure 24 . The second guard pattern 29 is located on at least one side of the display area 20D of the array substrate 20. Preferably, the second guard pattern 29 substantially surrounds the display area 20D of the array substrate 20. The position, pattern, and number of the second guard patterns 29 may be changed depending on electrostatic protection capability requirements or other considerations. In this embodiment, the material of the second protective pattern 29 The material may be a conductive material such as a metal or a transparent conductive material, and it may be a single layer structure or a multilayer structure. For example, in the embodiment, the second protection pattern 29 is formed by laminating a metal protection pattern 291 and a transparent protection pattern 292, wherein the metal protection pattern 291 can be connected to the gate line of the display array 28, for example. Any one of the data lines is composed of the same metal pattern, and the transparent protective pattern 292 can be composed of, for example, the same transparent conductive pattern as the pixel electrode (not shown). In addition, the transparent protective pattern 292 may be superposed only on the metal shield pattern 291 corresponding to the connection structure 24 without being completely overlapped with the metal shield pattern 291. As can be seen from the above, the in-cell touch display panel 50 of the present embodiment does not need to be electrically connected to the touch circuit board 26 and the connection structure 24 by using the first wire 21, and can be directly connected to the touch by the second protection pattern 29. Circuit board 26 and connection structure 24. The second protection pattern 29 can further enhance the electrostatic protection capability of the in-cell touch display panel 50 to prevent the display array 28 from being damaged by electrostatic damage due to unpredictable factors. Since the second protection pattern 29 of the embodiment is electrically connected to the first protection pattern 34 on the opposite substrate 30, the electrostatic protection capability for the capacitive touch sensing array 32 can be further increased. It should be noted that, in this embodiment, the connection structure 24 may also be the conductive sealant or the conductive bump disclosed in the first preferred embodiment, or the conductive gap disclosed in the modified embodiment of the first preferred embodiment. , or other structure with conductive properties.

Please refer to Figure 8. FIG. 8 is a schematic diagram of an array substrate of an in-cell touch display panel according to a variation of the second preferred embodiment of the present invention. As shown in FIG. 8, in the present modified embodiment, the second guard pattern 29 is located on one side of the display area 20D of the array substrate 20 instead of surrounding the display area 20D of the array substrate 20.

In summary, the inner surface of the opposite substrate of the in-cell touch display panel of the present invention is provided with a protection pattern to provide electrostatic protection capability to prevent the in-cell touch display panel from being destroyed by static electricity due to unpredictable factors. Damaged.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧In-cell touch display panel

20‧‧‧Array substrate

20D‧‧‧ display area

20P‧‧‧ surrounding area

20A‧‧‧ inner surface

21‧‧‧First wire

22‧‧‧second wire

23‧‧‧ Third wire

24‧‧‧ Connection structure

26‧‧‧Touch circuit board

28‧‧‧Display array

211‧‧‧Metal wire

212‧‧‧Transparent wires

30‧‧‧ opposite substrate

30P‧‧‧ surrounding area

30S‧‧‧Sensing area

30A‧‧‧ inner surface

32‧‧‧Capacitive touch sensing array

33‧‧‧Wire

34‧‧‧First protective pattern

40‧‧‧Liquid layer

10'‧‧‧In-cell touch display panel

35‧‧‧Transparent wires

241‧‧ ‧ spacers

242‧‧‧ Conductive layer

50‧‧‧In-cell touch display panel

29‧‧‧Second protective pattern

291‧‧‧ metal protection pattern

292‧‧‧Transparent protective pattern

27‧‧‧Display circuit board

32P‧‧‧Sense pad

1 to 3 are schematic views of an in-cell touch display panel according to a first preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of an in-cell touch display panel according to a variation of the first preferred embodiment of the present invention.

5 to 7 are schematic views of an in-cell touch display panel according to a second preferred embodiment of the present invention.

FIG. 8 is a schematic diagram of an array substrate of an in-cell touch display panel according to a variation of the second preferred embodiment of the present invention.

30‧‧‧ opposite substrate

32‧‧‧Capacitive touch sensing array

33‧‧‧Wire

34‧‧‧First protective pattern

32P‧‧‧Sense pad

Claims (12)

An in-cell touch display panel includes: an array substrate having a display area, and a peripheral area surrounding the display area; and a pair of substrates disposed opposite to the array substrate, wherein the opposite substrate An inner surface facing the array substrate, the opposite substrate having a sensing region, and a peripheral region surrounding the sensing region; a capacitive touch sensing array disposed on the inner surface of the opposite substrate And located in the sensing region; and a first shielding pattern disposed on the inner surface of the opposite substrate and located in the peripheral region of the opposite substrate, wherein the first protection pattern and the capacitive touch The sensing array is electrically separated. The in-cell touch display panel of claim 1, wherein the first guard pattern substantially surrounds the sensing region of the opposite substrate. The in-cell touch display panel of claim 1, wherein the first guard pattern has a compensation bias. The in-cell touch display panel of claim 1, wherein the array substrate has an inner surface facing the opposite substrate, the in-cell touch display panel further comprising a second protection pattern disposed on the array The inner surface of the peripheral region of the array substrate is electrically connected to the first shielding pattern. The in-cell touch display panel of claim 4, wherein the second guard pattern is located on at least one side of the display area of the array substrate. The in-cell touch display panel of claim 4, wherein the second guard pattern substantially surrounds the display area of the array substrate. The in-cell touch display panel of claim 4, further comprising a connection structure disposed between the array substrate and the opposite substrate, and the first protection pattern and the second protection pattern are connected via the connection Structural electrical connection. The in-cell touch display panel of claim 7, wherein the connection structure comprises a conductive sealant. The in-cell touch display panel of claim 7, wherein the connection structure comprises a conductive bump. The in-cell touch display panel of claim 7, wherein the connection structure comprises a spacer and a conductive layer, the spacer is disposed between the array substrate and the opposite substrate, and the conductive layer is disposed on the a surface of the spacer, and the first protection pattern and the second protection pattern are electrically connected via the conductive layer. The in-cell touch display panel of claim 4, wherein the first protection pattern And the second protection pattern has a compensation bias, and the in-cell touch display panel further includes a touch circuit board disposed on the array substrate and electrically connected to the second protection pattern for providing the compensation The first protection pattern and the second protection pattern are biased. The in-cell touch display panel of claim 1, further comprising a display medium layer disposed between the array substrate and the opposite substrate.