WO2020019415A1

WO2020019415A1 - Display panel

Info

Publication number: WO2020019415A1
Application number: PCT/CN2018/104372
Authority: WO
Inventors: 洪光辉
Original assignee: 武汉华星光电技术有限公司
Priority date: 2018-07-25
Filing date: 2018-09-06
Publication date: 2020-01-30
Also published as: CN108735094A

Abstract

A display panel (2), comprising: a display area (21) provided with a plurality of display units arranged in an array; a first non-display area (22) surrounding the display area (21); an opening (20) provided in a region in the display area (21); a second non-display area (28) located between the display area (21) and the opening (20), a plurality of arc-shaped wires (R) being provided in the second non-display area (28) and used for respectively connecting corresponding data line (D), gate line (G), and touch signal line (RX); and anti-electrostatic discharge protection circuit (39) comprising a floating metal wire (391), wherein the floating metal wire (391) is provided at the periphery of the opening (20) and located in the second non-display area (28). Providing the anti-electrostatic discharge protection circuit (39) in the second non-display area (28) improves the anti-ESD capability of the touch signal line (RX) in the second non-display area (28), thereby ensuring the reliability of the display panel (2) having the opening (20) in the display area (21).

Description

Display panel

Technical field

The present disclosure relates to a display panel, and more particularly to a display panel having an opening design in a display area.

Background technique

In order to realize the full-screen design of the whole machine and retain the front camera placement position, a display panel with an opening design in the display area (Active Area) has been developed. Please refer to FIG. 1, which shows a schematic diagram of a conventional display panel 1 with an opening 10 in the display area. The opening 10 is provided on the upper surface of the display panel 1, that is, a part of the display unit is removed at a position corresponding to the front camera in the upper surface. In the current opening design scheme, a part of the display unit is usually removed in a circular opening 10 design mode, and a frame 11 is designed around the opening 10, which is similar to the non-display area of the left and right frames to provide related transmission line settings. Compared with the common non-rectangular (not rectangular) panel with a notch, the display panel 1 adds a circular frame 11 to increase the risk of failure in reliability tests. For example, the display panel 1 is performing electrostatic discharge (Electrostatic discharge). , ESD) test, the risk of test failure.

Since the design of the opening 10 will remove some display units, in order to ensure normal display at positions other than the opening 10, the data line, gate line and touch signals need to be placed at the frame 11. (TP signal line) and other traces for optimized design. Usually, the arc traces are set at the frame 11 so that the gate lines can be connected to the left and right through the corresponding arc traces around the openings 10, and the data lines can be bypassed through the corresponding arc traces. 10 locations are connected up and down, and the touch signal line can be connected up and down by bypassing the openings 10 locations through corresponding arcuate traces. Based on the current design scheme, there are effective metal traces connecting the data lines, gate lines, and touch signal lines in a curved shape at the frame 11, which occupy most of the design space of the frame 11. In addition, the frame 11 usually adopts a narrow frame design and occupies part of the display area of the display panel 1. As a result, there cannot be a ground line design like the left and right frames at the frame 11 to protect the metal wiring from being accumulated inside the display panel 1 during the ESD test Excessive static electricity can cause the line to be injured, especially in the ESD reliability test, the ESD resistance at the frame 11 is weak. In addition, in the era of pursuing a full-screen, ultra-narrow bezel design, the bezel 11 around the opening 10 will also be compressed, which places higher requirements on reliability testing (ESD test at the bezel 11) and further increases the difficulty of panel design.

In view of this, it is necessary to propose a display panel to solve the problems existing in the prior art.

technical problem

In order to solve the above-mentioned problems in the prior art, an object of the present disclosure is to provide a display panel with an opening design in a display area. The anti-static discharge protection circuit is provided in a non-display area around the opening to improve the installation The anti-ESD capability of the touch signal lines near the openings further ensures the reliability of the display panel with the openings in the display area.

Technical solutions

To achieve the above object, the present disclosure provides a display panel including: a display area provided with a plurality of display units arranged in an array; a first non-display area surrounding the display area; and an opening formed in the display area. An area in the display area; a second non-display area located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connection A corresponding data line, gate line, or touch signal line; and an anti-static discharge protection circuit including a ring-shaped and closed floating metal trace, wherein the floating metal trace is disposed in the opening. And the display panel further includes a first touch signal line, and a part of the first touch signal line is provided in the display area and the other part is provided in the second non-display area; In the second non-display area, and both ends of the first touch signal line terminate in the display area.

The present disclosure also provides a display panel including: a display area provided with a plurality of display units arranged in an array; a first non-display area surrounding the display area; and an opening opened in the display area Area; a second non-display area is located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connecting corresponding data lines , A gate line, or a touch signal line; and an anti-static discharge protection circuit including a circular and closed floating metal trace, wherein the floating metal trace is disposed on the periphery of the opening and is located at The second non-display area; and a ground line provided in the first non-display area; and the anti-static discharge protection circuit further includes a first virtual touch signal line connected to the floating metal And the ground wire.

The present disclosure also provides a display panel including: a display area provided with a plurality of display units arranged in an array; a first non-display area surrounding the display area; and an opening opened in the display area Area; a second non-display area is located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connecting corresponding data lines , A gate line, or a touch signal line; and an anti-static discharge protection circuit including a floating metal trace, wherein the floating metal trace is disposed on the periphery of the opening and is located on the second Non-display area.

In one preferred embodiment of the present disclosure, the floating metal trace is a circular and closed trace.

In one of the preferred embodiments of the present disclosure, the display panel further includes a first touch signal line, and a portion of the first touch signal line is disposed in the display area and another portion is disposed in the second Non-display area, and both ends of the first touch signal line terminate in the display area.

In one preferred embodiment of the present disclosure, a portion of the first touch signal line in the display area is a straight line parallel to the data line, and a position of the first touch signal line is A portion of the second non-display area is curved in an arc shape.

In one preferred embodiment of the present disclosure, the display panel further includes a second touch signal line configured to pass through the display area and the second non-display area, and the first touch signal line and The second touch signal lines are symmetrically disposed with respect to each other with respect to a vertical line passing through a center of the opening.

In one preferred embodiment of the present disclosure, a ground line is provided in the first non-display area, and the anti-static discharge protection circuit further includes a first virtual touch signal line connected to the floating metal trace. Wire and the ground wire.

In one preferred embodiment of the present disclosure, the display panel further includes a third touch signal line, which extends straight along a direction parallel to the data line, and one end of the third touch signal line terminates at The display area and the other end terminate in the second non-display area.

In a preferred embodiment of the present disclosure, the third touch signal line and the first virtual touch signal line are located on the same straight line position.

In one preferred embodiment of the present disclosure, the anti-static discharge protection circuit further includes a second virtual touch signal line, connecting the floating metal trace and the ground line, and the second virtual touch The signal line is parallel to and separated from the first virtual touch signal line by a distance.

In one preferred embodiment of the present disclosure, the display panel further includes a fourth touch signal line, which is parallel to and separated from the third touch signal line by the same distance, and the fourth touch The signal line and the second virtual touch signal line are located in the same straight line position.

Beneficial effect

Compared with the prior art, the present disclosure achieves grounding at the outer border of the display panel (that is, the first non-display area) by adding a circle of metal traces at the outer periphery of the opening (that is, the second non-display area). The function of the wire further protects the trace located at the second non-display area around the opening from being damaged during the ESD reliability test. Further, the one circle of metal traces is connected to the ground line at the outer frame of the display panel to improve the anti-ESD resistance of the touch signal line at the second non-display area, thereby ensuring that there is an open circuit in the display area. Reliability of the display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a conventional display panel having an opening in a display area; FIG.

2 is a schematic diagram of a display panel according to a first preferred embodiment of the present disclosure;

FIG. 3 shows an enlarged schematic diagram of part A of the display panel of FIG. 1, and shows a schematic diagram of the design of data lines and gate lines at the second non-display area; FIG.

FIG. 4 shows an enlarged schematic view of part B of the display panel of FIG. 1; and

FIG. 5 is a partial schematic diagram of a display panel according to a second preferred embodiment of the present disclosure.

Best Mode of the Invention

In order to make the above and other objects, features, and advantages of the present disclosure more comprehensible, the following describes the preferred embodiments of the present disclosure and the accompanying drawings in detail, as follows.

Please refer to FIG. 2, which shows a schematic diagram of a display panel 2 according to a first preferred embodiment of the present disclosure, which specifically shows a touch scheme of a display panel 2 with an opening in a display area and a schematic diagram of related wiring designs. The display panel 2 of the present disclosure is provided in order to realize the full-screen design of the entire machine and retain the front camera placement position. The display panel 2 is provided with an opening 20 on the upper plate surface, that is, the position corresponding to the front camera. . In addition, the display panel 2 may be an LCD, an OLED, or the like, and may be applied in the fields of a mobile phone, a display, a television, and the like. The display panel 2 includes a display area 21 and a first non-display area 22. The first non-display area 22 surrounds the display area 21 and is located at an outermost frame of the display panel 2. The display area 21 is provided with a plurality of display units C arranged in an array, and the openings 20 are opened in the display area 21. It should be noted that, in a region other than part A of the display panel 2, the display unit C is generally rectangular in design, and in the region of part A, designed to fit the opening 20, the display unit C is usually shaped (non-rectangular) The design is adapted to meet the touch performance requirements, that is, the special-shaped design is performed according to the contour diagram at the opening 20.

As shown in FIG. 2, a ground line 23 (ie, GND) is provided in the first non-display area 22 and is designed to protect a circuit located at a surrounding frame. Specifically, the ground wire 23 is usually a metal wire in a circle to protect the circuit at the frame, thereby improving the overall anti-ESD capability of the display panel 2. In addition, the display panel 2 defines a display region boundary 24, a color filter boundary 25, and a thin film transistor boundary 26. The color filter boundary 25 is located between the display region boundary 24 and the thin film transistor boundary 26.

Please refer to FIG. 3, which shows an enlarged schematic diagram of part A of the display panel 2 of FIG. 1, and specifically shows the design schematic diagrams of the data lines D1-D4 and the gate lines G1-G4 near the opening 20. The display panel 2 further includes a second non-display area 28 located between the display area 21 and the opening 20, and its size is defined by the panel boundary 27 and the display area boundary 24. Since the display panel 2 has an opening 20 design, part of the display unit will be removed. In order to ensure normal display at positions other than the opening 20, a data line needs to be provided at the second non-display area 28. Routes D1-D4, gate lines G1-G4, and touch signal lines (TP signal lines) RX1-RX6 are optimized for design. Usually, the arc line R is provided on the second non-display area 28 so that the gate lines G1-G4 can bypass the opening 20 through the corresponding arc line R and connect left and right, and the data lines D1-D4. It can be connected up and down through the corresponding arc-shaped wiring R around the opening 20, and the touch signal line RX1-RX6 (refer to FIG. 4) can be connected up and down by the corresponding arc-shaped wiring R bypassing the opening 20 . Based on this design scheme, there will be multiple arc-shaped effective metal traces (that is, arc traces R) at the second non-display area 28 for connecting the corresponding data lines D1-D4 and gate lines G1-G4. And touch signal lines RX1-RX6.

Please refer to FIG. 4, which is an enlarged schematic diagram of a portion B of the display panel 2 of FIG. 1, which specifically shows a design schematic diagram of the touch signal lines of the display panel 2 at the second non-display area 28. FIG. 4 is described by using six sensor pads near the opening 20 as an example. In this touch sensing design solution, each sensing pad is connected to a corresponding touch signal line RX1-RX6 through a hole to realize a touch function. To ensure the sensitivity and accuracy of the touch function, the number of connection holes of each sensing pad is generally kept as consistent as possible. Taking the touch signal line RX1 as an example, the three sensing pads from the top to the bottom are respectively connected to the touch signal line RX1, the touch signal line RX2, and the touch signal line RX3. In addition, in order to ensure the consistency of the number of connection holes between the sensor pads and the touch signal lines RX1-RX6 near the opening 20, the three sensor pads in the second row are respectively connected to the touch signal line RX6 and the touch signal line from top to bottom. The control signal line RX5 and the touch signal line RX4 are connected.

As shown in FIG. 4, in the second non-display area 28, in order to ensure the uniformity of touch performance, the touch scheme is usually optimized in the second non-display area 28. Specifically, by using the mirrored design of the touch signal lines RX3 and RX4 at the second non-display area 28, the number of connection holes between the sensor pads near the opening 20 and the touch signal lines RX3 and RX4 is consistent. . In addition, for the two touch signal lines, the first touch signal line RX3 and the second touch signal line RX4, to ensure the uniformity of the design of the entire touch signal lines RX3 and RX4, it is not displayed in the second non-display. Area 28 is usually an arc-shaped line R, that is, arranged in an arc-shaped manner. To further explain, the first touch signal line RX3 and the second touch signal line RX4 are arranged to pass through the display area 21 and the second non-display area 28, and both ends terminate in the display area 21. The portion of the first touch signal line RX3 in the display area 21 is a straight line parallel to the data lines D1-D4 (see FIG. 3), and the portion of the first touch signal line RX3 in the second non-display area 28 It is also an arc-shaped wire R, which is curved in an arc. In addition, the second touch signal line RX4 is symmetrical to each other with respect to a vertical line (a vertical line parallel to the data lines D1-D4) passing through the center of the opening 20, and the first touch signal line RX3 and the second touch signal line RX4 are symmetrical to each other. Settings to ensure uniformity of touch performance.

As shown in FIG. 4, the display panel 2 also includes an anti-static discharge protection circuit, which is arranged near the opening 20 to improve the anti-ESD capability of the touch signal lines RX3 and RX4 at the second non-display area 28, thereby ensuring the The reliability of the display panel 2 having the openings 20 in the display area. In this embodiment, the anti-static discharge protection circuit is implemented by a ring-shaped and closed floating metal trace 29. The floating metal wiring 29 is disposed outside the opening 20 and is located in the second non-display area 28. The floating metal wiring 29 can be a single-layer wiring, a double-layer wiring, or a three-layer wiring, which is not limited. herein. The function of the ground wire 23 in the first non-display area 22 can be achieved by setting the floating metal traces 29, which can protect the wiring in the second non-display area 28 during the ESD test, and to a certain extent The anti-ESD capability of the second non-display area 28 is improved, thereby improving the reliability of the display panel 2.

Embodiments of the invention

Please refer to FIG. 5, which is a partial schematic diagram of a display panel 3 according to a second preferred embodiment of the present disclosure. The display panel 3 of the second preferred embodiment is also a display panel with an opening design in the display area, and its structure is substantially the same as that of the display panel 2 of the first preferred embodiment. The differences between the two are described below. The display panel 3 also includes an anti-static discharge protection circuit 39, which is disposed near the opening 30 to improve the anti-ESD capability of the touch signal lines RX7 and RX8 at the second non-display area 38, thereby ensuring that the display area has Reliability of the display panel 3 of the opening 30. In this embodiment, the ESD protection circuit 39 includes a ring-shaped and closed floating metal trace 391, a first dummy touch signal line 392, and a second dummy touch signal line 393. A virtual touch signal line 392 and a second virtual touch signal line 393 are connected to the floating metal trace 391 and the ground line 33.

As shown in FIG. 5, the floating metal trace 391 is disposed at the periphery of the opening 30 and is located in the second non-display area 38. The floating metal trace 391 may be a single-layer trace, a double-layer trace, Layer routing is not limited to this. By setting the floating metal trace 391, the function of the ground line 33, which is located in the first non-display area of the outermost panel 3, can be realized, and the second non-display area 38 is protected during the ESD test. And, to a certain extent, the ESD resistance of the second non-display area 38 is improved, thereby improving the reliability of the display panel 3.

Further, as shown in FIG. 5, the display panel 3 further includes a third touch signal line RX7 and a fourth touch signal line RX8, which extend straight along the direction of the parallel data line, and the third touch signal line RX7 and One end of the fourth touch signal line RX8 terminates in the display area 31, and the other end terminates in the second non-display area 38. It should be noted that the third touch signal line RX7 and the first virtual touch signal line 392 are in the same linear position, and the fourth touch signal line RX8 and the second virtual touch signal line 393 are in the same line. On a straight line. In addition, the second virtual touch signal line 393 is parallel to the first virtual touch signal line 392 and separated by a distance D, and the fourth touch signal line RX8 and the third touch signal line RX7 are parallel and separated by the same distance D.

As shown in FIG. 5, by optimizing the design, a floating metal trace 391 of the ESD protection circuit 39 and the first non-display area located at the outermost periphery of the display panel 3 are utilized at the second non-display area 38. The ground wires 33 are connected, that is, the grounding design scheme is implemented in the second non-display area 38, which greatly improves the anti-ESD capability at the second non-display area 38 and improves the reliability of the display panel 3. Further, in order to ensure the uniformity of touch performance, the touch solution is usually optimized at the second non-display area 38, specifically through the touch signal lines RX7 and RX8 at the second non-display area 38 The mirror design is adopted to ensure the consistency of the number of the connection holes between the sensor pad and the touch signal near the opening 30. In this design scheme, for the two touch signal lines of the fourth touch signal line RX8 and the third touch signal line RX7, in order to ensure the uniformity of the design of the entire touch signal line, and without affecting the touch Under the premise of controlling performance, this embodiment uses the fourth touch signal line RX8 at the second non-display area 38 to be disconnected from the third touch signal line RX7, which can ensure the fourth touch signal line RX8 in the original design. Connectivity to the third touch signal line RX7 and the sensing pad. On the other hand, by connecting the floating metal trace 391 to the ground line 33 located at the first non-display area of the display panel 3, the floating metal trace 391 at the second non-display area 38 is effectively improved. The anti-GND function further improves the anti-ESD capability of the touch signal lines RX7 and RX8 at the second non-display area 38, which ensures the reliability of the display panel 3 with openings in the display area.

In summary, the present disclosure achieves a ground line at the outer border of the display panel (that is, the first non-display area) by adding a circle of metal traces at the outer periphery of the opening (that is, the second non-display area). The function further protects the traces located at the second non-display area around the opening from being damaged during the ESD reliability test. Further, the one-ring metal trace is connected with the ground wire at the outer frame of the display panel to improve the anti-ESD resistance of the touch signal line at the second non-display area, thereby ensuring that the Reliability of the display panel.

The above are only the preferred embodiments of the present disclosure. It should be noted that, for those skilled in the art, without departing from the principles of the present disclosure, several improvements and retouches can be made. These improvements and retouches should also be regarded as the protection of the present disclosure. range.

Claims

A display panel including:

A display area provided with a plurality of display units arranged in an array;

A first non-display area surrounding the display area;

An opening to open an area in the display area;

A second non-display area is located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connecting corresponding data lines and gates. Cables, or touch signal cables; and

An anti-static discharge protection circuit comprising a ring-shaped and closed floating metal trace, wherein the floating metal trace is disposed on the periphery of the opening and is located in the second non-display area; and

The display panel further includes a first touch signal line, and a part of the first touch signal line is disposed in the display area and another part is disposed in the second non-display area, and the first Both ends of the touch signal line terminate in the display area.
The display panel of claim 1, wherein a portion of the first touch signal line in the display area is a straight line parallel to the data line, and a position of the first touch signal line is in the A portion of the second non-display area is curved in an arc shape.
The display panel according to claim 2, wherein the display panel further comprises a second touch signal line configured to pass through the display area and the second non-display area, and the first touch signal line and all The second touch signal lines are symmetrically disposed with respect to each other with respect to a vertical line passing through a center of the opening.
A display panel including:

A display area provided with a plurality of display units arranged in an array;

A first non-display area surrounding the display area;

An opening to open an area in the display area;

A second non-display area is located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connecting corresponding data lines and gates. Cables, or touch signal cables; and

An anti-static discharge protection circuit comprising a ring-shaped and closed floating metal trace, wherein the floating metal trace is disposed on the periphery of the opening and is located in the second non-display area; and

A ground line is provided in the first non-display area, and the anti-static discharge protection circuit further includes a first virtual touch signal line connected to the floating metal trace and the ground line.
The display panel of claim 4, wherein the display panel further comprises a third touch signal line extending straight along a direction parallel to the data line, and one end of the third touch signal line terminates at The display area, and the other end terminating in the second non-display area.
The display panel of claim 5, wherein the third touch signal line and the first virtual touch signal line are located on a same straight position.
The display panel according to claim 6, wherein the anti-static discharge protection circuit further comprises a second virtual touch signal line, connecting the floating metal trace and the ground line, and the second virtual touch signal The lines are parallel to the first virtual touch signal line and separated by a distance.
The display panel of claim 7, wherein the display panel further comprises a fourth touch signal line parallel to the third touch signal line and separated by the same distance, and the fourth touch signal The line and the second virtual touch signal line are located at the same straight line position.
A display panel including:

A display area provided with a plurality of display units arranged in an array;

A first non-display area surrounding the display area;

An opening to open an area in the display area;

A second non-display area is located between the display area and the opening, and a plurality of arc-shaped traces are arranged in the second non-display area for connecting corresponding data lines and gates. Cables, or touch signal cables; and

An anti-static discharge protection circuit includes a floating metal trace, wherein the floating metal trace is disposed on the periphery of the opening and is located in the second non-display area.
The display panel of claim 9, wherein the floating metal trace is a circular and closed trace.
The display panel of claim 9, wherein the display panel further comprises a first touch signal line, and a part of the first touch signal line is provided in the display area and another part is provided in the second non- A display area, and both ends of the first touch signal line terminate in the display area.
The display panel of claim 11, wherein a portion of the first touch signal line in the display area is a straight line parallel to the data line, and a position of the first touch signal line is in the A portion of the second non-display area is curved in an arc shape.
The display panel according to claim 12, wherein the display panel further comprises a second touch signal line configured to pass through the display area and the second non-display area, and the first touch signal line and all The second touch signal lines are symmetrically disposed with respect to each other with respect to a vertical line passing through a center of the opening.
The display panel according to claim 9, wherein a ground line is provided in the first non-display area, and the anti-static discharge protection circuit further comprises a first virtual touch signal line connected to the floating metal trace. And the ground wire.
The display panel according to claim 14, wherein the display panel further comprises a third touch signal line extending straight along a direction parallel to the data line, and one end of the third touch signal line terminates at the The display area, and the other end terminating in the second non-display area.
The display panel according to claim 15, wherein the third touch signal line and the first virtual touch signal line are located on a same straight line position.
The display panel according to claim 16, wherein the anti-static discharge protection circuit further comprises a second virtual touch signal line, connecting the floating metal trace and the ground line, and the second virtual touch signal The lines are parallel to the first virtual touch signal line and separated by a distance.
The display panel of claim 17, wherein the display panel further comprises a fourth touch signal line parallel to the third touch signal line and separated by the same distance, and the fourth touch signal The line and the second virtual touch signal line are located at the same straight line position.