CN112416168A - Display panel and display device - Google Patents

Abstract

Translated fromChinese

本发明所提的供显示面板及显示设备，显示面板包括显示区域和围绕显示区域的边框区域，还包括衬底、位于边框区域对应的衬底上的电源走线和驱动电路走线、位于边框区域的第一搭接线以及位于边框区域的触控走线，第一搭接线搭接于电源走线的远离衬底的一侧并向显示区域的方向延伸，且第一搭接线位于驱动电路走线远离衬底的一侧，触控走线位于第一搭接线远离衬底的一侧。驱动电路走线和触控走线在衬底上的正投影存在重叠区域，且第一搭接线在衬底上的正投影覆盖至少部分重叠区域。如此，通过第一搭接线形成用于屏蔽驱动电路走线和触控走线之间的信号串扰的信号屏蔽结构，能够避免驱动电路走线的驱动信号和触控走线的触控信号之间出现信号串扰，从而改善驱动电路走线和触控走线之间的信号串扰问题。

The present invention provides a display panel and a display device. The display panel includes a display area and a frame area surrounding the display area, and further includes a substrate, a power supply wiring and a driving circuit wiring located on the substrate corresponding to the frame area, and a frame located on the frame. The first overlap wire in the area and the touch trace located in the frame area, the first overlap wire overlaps the side of the power trace away from the substrate and extends toward the display area, and the first overlap wire is located on the side of the power trace away from the substrate. The drive circuit traces are located on the side away from the substrate, and the touch traces are located at the side of the first bonding wire away from the substrate. The orthographic projections of the driving circuit traces and the touch traces on the substrate have overlapping areas, and the orthographic projections of the first bonding wires on the substrate cover at least part of the overlapping area. In this way, a signal shielding structure for shielding the signal crosstalk between the driving circuit wiring and the touch wiring is formed by the first bonding wire, which can avoid the interaction between the driving signal of the driving circuit wiring and the touch signal of the touch wiring. Signal crosstalk occurs between the driving circuit traces and the touch traces, thereby improving the signal crosstalk problem between the driving circuit traces and the touch traces.

Description

Display panel and display device

Technical Field

The invention belongs to the technical field of display, and particularly relates to a display panel and display equipment.

Background

The need for narrow borders is increasing with increasing user demands on the appearance (e.g., high screen ratio) and performance (e.g., resolution) requirements of the display device. Therefore, the screen occupation ratio of the frame area of the display panel in the whole display panel is less and less, and the problem of signal crosstalk easily occurs in the frame area of the narrow-frame display panel.

Disclosure of Invention

In order to solve the technical problem, the invention provides a display panel and a display device.

In a first aspect of the embodiments of the present invention, a display panel is provided, which includes a display area and a frame area surrounding the display area, and the display panel includes: a substrate; the power supply wiring and the driving circuit wiring are positioned on the substrate corresponding to the frame area, and the driving circuit wiring is positioned on one side of the power supply wiring, which is close to the display area; the first overlapping wire is positioned in the frame area, is overlapped on one side, away from the substrate, of the power supply wiring and extends towards the direction of the display area, and is positioned on one side, away from the substrate, of the driving circuit wiring; the touch control wiring is positioned in the frame area and positioned on one side, away from the substrate, of the first overlapping wire; the orthographic projections of the driving circuit traces and the touch traces on the substrate are overlapped, and the orthographic projections of the first overlapping wires on the substrate cover at least part of the overlapped area. By the design, the first overlapping wire forms a signal shielding structure for shielding signal crosstalk between the drive circuit wiring and the touch wiring, crosstalk between a drive signal of the drive circuit wiring and a touch signal of the touch wiring can be avoided, and therefore the problem of signal crosstalk between the drive circuit wiring and the touch wiring is solved.

In an alternative embodiment of the first aspect, further comprising: an isolation layer; the isolation layer is formed on one side, far away from the substrate, of the driving circuit wire, and covers the driving circuit wire and part of the power supply wire; preferably, the isolation layer is an organic material. So design, through setting up the isolation layer, can realize many drive circuit and walk the insulating isolation between the line each other.

In an alternative embodiment of the first aspect, the first strap defines at least one first opening in a region overlying the isolation layer. By the design, water vapor in the isolation layer can be released through the first opening, and in addition, the first opening can reduce the contact area between the isolation layer and the first lap joint line, so that the peeling phenomenon (peeling) is prevented.

In an alternative embodiment of the first aspect, further comprising: a protective layer; the protective layer is filled in the position of the first opening and covers at least part of the first bonding wire. By the design, the protective layer at the position of the first opening can prevent the first bonding wire from being corroded in other etching processes of the display panel.

In an alternative embodiment of the first aspect, further comprising: a second lap joint line; the second overlapping wire overlaps one side, away from the substrate, of the first overlapping wire and extends towards the display area. By the design, the first overlapping wire and the second overlapping wire jointly form a signal shielding structure for shielding signal crosstalk between the driving circuit wiring and the touch wiring, crosstalk between a driving signal of the driving circuit wiring and a touch signal of the touch wiring can be avoided, and therefore the problem of signal crosstalk between the driving circuit wiring and the touch wiring is solved.

In an alternative embodiment of the first aspect, an orthographic projection of the second crossover line on the substrate covers at least part of the overlap region. By the design, the first overlapping wire and the second overlapping wire jointly form a signal shielding structure for shielding signal crosstalk between the driving circuit wiring and the touch wiring, crosstalk between a driving signal of the driving circuit wiring and a touch signal of the touch wiring can be avoided, and therefore the problem of signal crosstalk between the driving circuit wiring and the touch wiring is solved.

In an alternative embodiment of the first aspect, the second strap defines at least one second opening in a region overlying the isolation layer; an orthographic projection of the second opening on the substrate does not overlap with an orthographic projection of the first opening on the substrate. By the design, the openings are alternately formed in the first overlapping wire and the second overlapping wire, so that the first opening and the second opening are mutually staggered and not communicated, and the signal shielding structure formed by the common overlapping of the first overlapping wire and the second overlapping wire can effectively shield signal crosstalk between the driving circuit wiring and the touch wiring on the premise of accelerating the release of water vapor in the isolation layer.

In an alternative embodiment of the first aspect, the display area further comprises: the pixel definition layer, the organic light emitting layer, the cathode layer, the packaging film layer and the touch film layer are arranged on the substrate in a stacked mode; wherein a material of the second lap wire is the same as a material of the anode layer.

In an alternative embodiment of the first aspect, further comprising: a cathode crossover; the cathode overlapping wire is overlapped on one side, far away from the first overlapping wire, of the second overlapping wire and is connected with the cathode of the display area; the power supply wiring sequentially passes through the first overlapping wire, the second overlapping wire and the cathode overlapping wire to provide power supply voltage for the cathode of the display area. By the design, the signal shielding structure formed by the first overlapping wire, the second overlapping wire and the cathode overlapping wire can effectively shield signal crosstalk between the drive circuit wiring and the touch wiring.

In a second aspect of the embodiments of the present invention, there is provided a display device including the display panel of the first aspect. The display equipment can avoid the problem of signal crosstalk in the frame area when in use.

In summary, compared with the prior art, the display panel and the display apparatus provided in the embodiments of the present invention include a display area and a frame area surrounding the display area. Furthermore, the display panel comprises a substrate, a power supply line and a driving circuit line which are located on the substrate corresponding to the frame region, a first overlapping line which is located in the frame region and a touch control line which is located in the frame region, wherein the first overlapping line is overlapped on one side, away from the substrate, of the power supply line and extends towards the direction of the display region, the first overlapping line is located on one side, away from the substrate, of the driving circuit line, and the touch control line is located on one side, away from the substrate, of the first overlapping line. The orthographic projections of the driving circuit wires and the touch wires on the substrate are overlapped, and the orthographic projections of the first lap wires on the substrate cover at least part of the overlapped area. Therefore, the signal shielding structure for shielding signal crosstalk between the driving circuit wiring and the touch wiring is formed through the first overlapping wire, signal crosstalk between the driving signal of the driving circuit wiring and the touch signal of the touch wiring can be avoided, and the problem of signal crosstalk between the driving circuit wiring and the touch wiring is solved.

Drawings

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the bezel area shown in fig. 1.

Fig. 3 is a schematic view of the openings on the first bonding line shown in fig. 2.

Fig. 4 is a schematic structural diagram of the protective layer shown in fig. 2.

Fig. 5 is a schematic plan view of the protective layer shown in fig. 2.

Fig. 6 is a schematic view of the structure of the opening on the second overlapping line shown in fig. 2.

Icon:

100-a display panel;

a-a display area; b-a border area;

10-a substrate;

20-a buffer layer;

31-power supply wiring;

32-drive circuit routing;

40-an isolation layer;

50-a first crossover; 501-first opening;

60-a protective layer; 601-a through slot;

71-a second crossover; 711-second opening; 72-cathode crossover;

81-pixel definition layer; 82-support column; 83-first encapsulation layer; 84-a second encapsulation layer; 85-third encapsulation layer; 86-a touch film layer;

90-touch trace.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, when an element is referred to as being "formed on" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

As described in the foregoing background, the problem of signal crosstalk is easily caused in the frame area of the narrow-frame display panel, and one of the main reasons is that it is difficult to shield signals between the driving circuit traces and the touch traces.

In order to improve the technical problem, the inventor innovatively improves the lap joint structure between the common cathode wiring and the cathode pixel negative pressure wiring, so that not only can signal shielding between the driving circuit wiring and the touch wiring be realized, but also water vapor below the lap joint structure can be released.

The embodiments of the present invention will be further described with reference to the accompanying drawings. Referring to fig. 1 and fig. 2, adisplay panel 100 according to an embodiment of the present invention includes a display area a and a frame area B surrounding the display area a. Thedisplay panel 100 may include asubstrate 10, apower trace 31, adriving circuit trace 32, afirst bonding wire 50, and atouch trace 90.

Further, apower trace 31 and adriving circuit trace 32 are disposed on thesubstrate 10 corresponding to the frame region B, and thedriving circuit trace 32 is disposed on one side of thepower trace 31 close to the display region a. Thefirst overlapping line 50 is located in the frame region B, thefirst overlapping line 50 overlaps the side of thepower trace 31 away from thesubstrate 10 and extends toward the display region a, thefirst overlapping line 50 is located on the side of thedriving circuit trace 32 away from thesubstrate 10, and thetouch trace 90 is located on the side of thefirst overlapping line 50 away from thesubstrate 10.

In the present embodiment, there is an overlapping area in the orthographic projection of the drivingcircuit trace 32 and thetouch trace 90 on thesubstrate 10, and the orthographic projection of the first overlappingwire 50 on thesubstrate 10 covers at least a part of the overlapping area. By such design, the first overlappingwire 50 can form a signal shielding structure for shielding signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90, so as to avoid crosstalk between the driving signal of the drivingcircuit trace 32 and the touch signal of thetouch trace 90, thereby improving the signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90.

In this embodiment, the drivingcircuit trace 32 may be understood as a frame area trace of a light emitting control circuit (EM circuit), i.e., an EM trace, and the drivingcircuit trace 32 may be used to transmit a light emitting control signal to control thedisplay panel 100 to perform display. Thetouch trace 90 may be a border area trace of a touch electrode, and thetouch trace 90 is used for transmitting a touch signal (TP signal) to implement a touch function of a display device using thedisplay panel 100.

In this embodiment, thepower trace 31 and the drivingcircuit trace 32 may be disposed in the same layer. Optionally, abuffer layer 20 may be further formed between thepower trace 31 and the drivingcircuit trace 32 and thesubstrate 10, and thebuffer layer 20 may be made of an inorganic material, such as silicon oxide or silicon nitride. For example, thebuffer layer 20 can implement stress relief and dislocation filtering, thereby improving lattice mismatch between thesubstrate 10 and the power traces 31 and the driving circuit traces 32 and ensuring product quality of theentire display panel 100.

In order to achieve the insulation and isolation among the plurality of driving circuit traces 32, please continue to refer to fig. 2, in some examples, thedisplay panel 100 may further include anisolation layer 40, theisolation layer 40 is formed on a side of the drivingcircuit trace 32 away from thesubstrate 10, and theisolation layer 40 covers the drivingcircuit trace 32 and a portion of thepower trace 31. In the present embodiment, theisolation layer 40 may be an organic material. By such design, theisolation layer 40 can achieve the isolation between the plurality of driving circuit traces 32.

In order to release the moisture in theisolation layer 40, please refer to fig. 3, in a possible embodiment, at least onefirst opening 501 is formed in a region of thefirst bonding wire 50 covering theisolation layer 40, such that the moisture in theisolation layer 40 can be released through thefirst opening 501, and thefirst opening 501 can reduce a contact area between theisolation layer 40 and thefirst bonding wire 50 to prevent a peeling phenomenon (peeling). Further, there is no overlap between the orthographic projection of thefirst opening 501 on thesubstrate 10 and the above overlapping region (the overlapping region between the orthographic projections of the driving circuit traces 32 and the touch traces 90 on the substrate 10), and at this time, the orthographic projection of the first overlappingwire 50 on thesubstrate 10 can cover the orthographic projection of the driving circuit traces 32 on thesubstrate 10, so as to better avoid crosstalk between the driving signal of the driving circuit traces 32 and the touch signal of the touch traces 90, and further improve the signal crosstalk problem between the driving circuit traces 32 and the touch traces 90.

In one possible embodiment, in order to avoid corrosion of thefirst bonding wire 50, please continue to refer to fig. 2, thedisplay panel 100 may further include aprotective layer 60, wherein theprotective layer 60 fills thefirst opening 501 and covers at least a portion of a side surface of thefirst bonding wire 50 away from thesubstrate 10. By doing so, theprotection layer 60 at the position of thefirst opening 501 can prevent thefirst bonding wire 50 from being corroded in other etching processes of thedisplay panel 100.

In an alternative embodiment, with continued reference to fig. 2, thedisplay panel 100 may further include asecond bonding wire 71, thesecond bonding wire 71 is bonded to a side of thefirst bonding wire 50 away from thesubstrate 10 and extends in a direction of the display area a, and an orthogonal projection of thesecond bonding wire 71 on thesubstrate 10 covers at least a portion of the overlapping area (an overlapping area between orthogonal projections of the driving circuit traces 32 and the touch traces 90 on the substrate 10). By such design, the first overlappingwire 50 and the second overlappingwire 71 jointly form a signal shielding structure for shielding signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90, so that crosstalk between a driving signal of the drivingcircuit trace 32 and a touch signal of thetouch trace 90 can be avoided, and the problem of signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90 is further improved.

With theprotective layer 60, in order to reduce the overlap resistance between the first overlappingwire 50 and the second overlappingwire 71, please refer to fig. 4 and fig. 5 in combination, theprotective layer 60 may be provided with a through groove 601 (it can be understood that the entire surface of theprotective layer 60 is provided with a large hole), and a part of the second overlappingwire 71 is located in the throughgroove 601. With such a design, the contact area between the first overlappingwire 50 and the second overlappingwire 71 is increased, and the overlap resistance between the first overlappingwire 50 and the second overlappingwire 71 can be reduced.

In practical applications, since the first overlappingline 50 and the second overlappingline 71 are of a double overlapping structure, in order to release moisture in theisolation layer 40, not only the first overlappingline 50 but also the second overlappingline 71 may be perforated. Referring to fig. 6, a schematic diagram of the structure of the opening on thesecond bonding wire 71 is shown, wherein at least onesecond opening 711 is formed in a region of thesecond bonding wire 71 covering theisolation layer 40, and an orthographic projection of thesecond opening 711 on thesubstrate 10 is not overlapped with an orthographic projection of thefirst opening 501 on thesubstrate 10.

By such design, the first overlappingwire 50 and the second overlappingwire 71 are alternately provided with the openings, so that thefirst opening 501 and thesecond opening 711 are mutually staggered and not communicated, and thus, the signal shielding structure formed by overlapping the first overlappingwire 50 and the second overlappingwire 71 together can effectively shield the signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90 on the premise of accelerating the release of water vapor in theisolation layer 40.

In an alternative embodiment, referring to fig. 2 in combination, thedisplay panel 100 may further include: and acathode overlapping wire 72, wherein thecathode overlapping wire 72 is overlapped on one side of the second overlappingwire 71 far away from the first overlappingwire 50 and is connected with the cathode of the display area A. Thepower supply line 31 supplies a power supply voltage to the cathode of the display area a through the first overlappingwire 50, the second overlappingwire 71, and thecathode overlapping wire 72 in sequence. By such design, the signal shielding structure formed by thefirst bonding wire 50, thesecond bonding wire 71 and thecathode bonding wire 72 can effectively shield signal crosstalk between the drivingcircuit trace 32 and thetouch trace 90.

In one possible embodiment, the display area a may further include an anode layer, a pixel defining layer, an organic light emitting layer, a cathode layer, an encapsulation film layer, and a touch film layer, which are stacked on thesubstrate 10. The material of thesecond strap 71 is the same as that of the anode layer, and the material of thesecond strap 71 may be a transparent conductive material, such as Indium Tin Oxide (ITO) and Indium Zinc Oxide (IZO), so that the anode can be prepared while thesecond strap 71 is prepared, thereby simplifying the preparation process of thesecond strap 71.

In some examples, with reference to fig. 2, thedisplay panel 100 may further include apixel defining layer 81 formed on a side of thesecond bonding wire 71 away from thesubstrate 10 and located at two ends of the frame region B, and a supportingpillar 82 located above thepixel defining layer 81 located at one end of the frame region B away from the display region a. Among other things, the support posts 82 may be used to prevent the encapsulating material from overflowing.

Further, thedisplay panel 100 may further include afirst encapsulation layer 83, asecond encapsulation layer 84, athird encapsulation layer 85, and atouch film layer 86. Thefirst encapsulation layer 83 extends from one end of the frame region B away from the display region a toward the display region a, and thefirst encapsulation layer 83 is used for encapsulating thesecond bonding wire 71, thecathode bonding wire 72, thepixel defining layer 81 and thesupport pillar 82. Further, asecond encapsulation layer 84 is formed on thefirst encapsulation layer 83 between theisolation pillar 82 and the display area a, athird encapsulation layer 85 extends from an end of the frame area B away from the display area a to the display area a, and thethird encapsulation layer 85 is used for encapsulating a portion of thefirst encapsulation layer 83 and thesecond encapsulation layer 84.

In this embodiment, thefirst encapsulation layer 83 and thethird encapsulation layer 85 may be CVD encapsulation layers, and thesecond encapsulation layer 84 may be an IJP encapsulation layer. It is understood that thefirst encapsulation layer 83 and thethird encapsulation layer 85 may be inorganic encapsulation layers and thesecond encapsulation layer 84 may be organic encapsulation layers. Thus, thefirst package layer 83, thesecond package layer 84, and thethird package layer 85 are sequentially formed into an inorganic, organic, and inorganic sandwich package structure.

Further, thedisplay panel 100 shown in fig. 2 may further include atouch film layer 86, thetouch film layer 86 is formed on a side of thethird encapsulation layer 85 away from thefirst encapsulation layer 83, and thetouch trace 90 is formed based on thetouch film layer 86. For example, thetouch trace 90 may be formed on a side of thetouch film layer 86 away from thethird packaging layer 85.

On the basis, the embodiment of the invention also provides a display device, which comprises the display panel. Specifically, the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention. It can be understood that the display device can avoid the problem of signal crosstalk in the frame area when in use.

To sum up, according to thedisplay panel 100 and the display device provided in the embodiments of the present invention, the routing overlapping of the frame region B of thedisplay panel 100 is improved, and by arranging the first overlappingline 50 in the frame region B and enabling the orthographic projection of the first overlappingline 50 on thesubstrate 10 to cover the overlapping region existing in the orthographic projection of the drivingcircuit trace 32 and thetouch control trace 90 on thesubstrate 10, the signal crosstalk between the driving signal of the drivingcircuit trace 32 and the touch control signal of thetouch control trace 90 can be avoided, so that the problem of the signal crosstalk between the drivingcircuit trace 32 and thetouch control trace 90 is improved.

In addition, the second overlappingwire 71 is added on the basis of the above structure, and at least one of the first overlappingwire 50 and the second overlappingwire 71 is opened, so that the release of moisture in theseparator 40 can be achieved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A display panel including a display area and a bezel area surrounding the display area, the display panel comprising:

a substrate;

the power supply wiring and the driving circuit wiring are positioned on the substrate corresponding to the frame area, and the driving circuit wiring is positioned on one side of the power supply wiring, which is close to the display area;

the first overlapping wire is positioned in the frame area, is overlapped on one side, away from the substrate, of the power supply wiring and extends towards the direction of the display area, and is positioned on one side, away from the substrate, of the driving circuit wiring;

the touch control wiring is positioned in the frame area and positioned on one side, away from the substrate, of the first overlapping wire;

the orthographic projections of the driving circuit traces and the touch traces on the substrate are overlapped, and the orthographic projections of the first overlapping wires on the substrate cover at least part of the overlapped area.

2. The display panel according to claim 1, further comprising: an isolation layer;

the isolation layer is positioned on one side of the driving circuit wire, which is far away from the substrate, and covers the driving circuit wire and part of the power supply wire;

preferably, the isolation layer is an organic material.

3. The display panel of claim 2, wherein the first bonding wire has at least one first opening in a region covering the isolation layer.

4. The display panel according to claim 3, further comprising: a protective layer;

the protective layer is filled in the position of the first opening and covers at least part of the first bonding wire.

5. The display panel according to claim 3, further comprising: a second lap joint line;

the second overlapping wire overlaps one side, away from the substrate, of the first overlapping wire and extends towards the display area.

6. A display panel as claimed in claim 5 characterized in that an orthographic projection of the second crossover line on the substrate covers at least part of the overlap area.

7. The display panel according to claim 6, wherein the second bonding wire has at least one second opening in a region covering the isolation layer;

an orthographic projection of the second opening on the substrate does not overlap with an orthographic projection of the first opening on the substrate.

8. The display panel according to claim 5, wherein the display area further comprises:

the pixel definition layer, the organic light emitting layer, the cathode layer, the packaging film layer and the touch film layer are arranged on the substrate in a stacked mode;

wherein a material of the second lap wire is the same as a material of the anode layer.

9. The display panel according to any one of claims 5 to 8, further comprising: a cathode crossover;

the cathode overlapping wire is overlapped on one side, far away from the first overlapping wire, of the second overlapping wire and is connected with the cathode of the display area;

the power supply wiring sequentially passes through the first overlapping wire, the second overlapping wire and the cathode overlapping wire to provide power supply voltage for the cathode of the display area.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.

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