Display panel and display device

Abstract

The application provides a display panel and a display device, and the display panel at least comprises a substrate, a wiring layer and a covering structure, wherein the substrate is provided with a fan-out area, the wiring layer is arranged on the substrate and located in the fan-out area, the wiring layer at least comprises periodically arranged sensing reading lines and a plurality of pixel data lines, the covering structure is arranged in a layer different from the wiring layer, and the orthographic projection of the covering structure on the substrate covers the orthographic projection of the sensing reading lines on the substrate; and the potential of the covering structure is configured to be floating. The display panel provided by the application adds the covering structure above the projection of the sensing reading lines, and configures the potential of the covering structure to be floating. Therefore, when an electric signal is transmitted on the sensing reading lines and the pixel data lines, a shielding electric field is formed between the covering structure and the sensing reading lines. The existence of the shielding electric field can reduce the capacitance between the sensing reading lines and the adjacent pixel data lines, thereby effectively improving the signal-to-noise ratio during signal transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display panel, in particular, to a display panel and a display device. BACKGROUND

[0002] With the continuous development of electronic technology, more and more application scenarios in life need to use display devices, wherein the display device generally includes a display panel.

[0003] Therefore, how to ensure the reliability of signal transmission in the display panel is a problem to be solved at present. SUMMARY

[0004] The present application provides the following technical solutions, which can solve the problem that the capacitance between the sensing read line and the adjacent pixel data line in the display panel is large due to the short distance, thereby affecting the signal-to-noise ratio during signal transmission.

[0005] In a first aspect, the present application provides a display panel, comprising at least:

[0006] a substrate provided with a fan-out area;

[0007] a wiring layer disposed on the substrate and located in the fan-out area, the wiring layer comprising at least a periodic arrangement of a sensing read line and a plurality of pixel data lines; and

[0008] a cover structure disposed in a layer different from the wiring layer, and a projection of the cover structure on the substrate covers a projection of the sensing read line on the substrate, and the potential of the cover structure is configured to be floating.

[0009] According to the display panel of an embodiment of the present application, the display panel further comprises a plurality of virtual signal lines disposed in the fan-out area, the virtual signal lines are located between the sensing read line and the pixel data line, and the potential of the virtual signal lines is configured to be floating.

[0010] According to the display panel of an embodiment of the present application, the plurality of virtual signal lines comprises a first virtual signal line and a second virtual signal line, and the first virtual signal line and the second virtual signal line are symmetrically disposed on both sides of the same sensing read line.

[0011] According to the display panel of an embodiment of the present application, the projection of the cover structure on the substrate further covers the projection of the virtual signal line on the substrate, and the projection of the cover structure on the substrate further covers the projection of the interval between the virtual signal line and the sensing read line on the substrate.

[0012] The display panel according to an embodiment of the present application, the width of the sensing read line, the pixel data line and the virtual signal line is equal; and / or

[0013] The sensing read line, the pixel data line and the virtual signal line are arranged at equal intervals.

[0014] The display panel according to an embodiment of the present application, the plurality of virtual signal lines, the sensing read line and the plurality of pixel data lines are arranged in the same layer.

[0015] The display panel according to an embodiment of the present application, the sensing read line has a first distance with the adjacent pixel data line, and the adjacent pixel data lines have a second distance, wherein the first distance is greater than the second distance.

[0016] The display panel according to an embodiment of the present application, the material of the covering structure comprises metal or metal oxide.

[0017] The display panel according to an embodiment of the present application, each sensing read line is coupled with a plurality of sensing unit circuits, and each pixel data line is coupled with a plurality of pixel unit circuits, wherein the plurality of sensing unit circuits and the plurality of pixel unit circuits are arranged in an array in a display area of the display panel.

[0018] In a second aspect, the present application provides a display device, comprising at least the display panel and a backlight source, the backlight source is connected with the display panel and used for providing backlight to the display panel.

[0019] The display panel and the display device provided by the present application have the following beneficial effects: the display panel comprises a substrate, a wiring layer and a covering structure, the substrate is provided with a fan-out area, the wiring layer is arranged on the substrate and located in the fan-out area, the wiring layer comprises periodically arranged sensing read lines and a plurality of pixel data lines, the covering structure is arranged in a layer different from the wiring layer, and the orthogonal projection of the covering structure on the substrate covers the orthogonal projection of the sensing read lines on the substrate, and the potential of the covering structure is configured to be floating. The display panel provided by the present application adds the covering structure above the projection of the sensing read lines, and configures the potential of the covering structure to be floating. Therefore, when an electric signal is transmitted on the sensing read lines and the pixel data lines, a shielding electric field is formed between the covering structure and the sensing read lines. The shielding electric field can reduce the capacitance between the sensing read lines and the adjacent pixel data lines, thereby effectively improving the signal-to-noise ratio during signal transmission. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the following description of the embodiments according to the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative efforts based on the drawings are within the scope of the present application.

[0021] Figure 1 is a schematic diagram of the front view structure of the display panel according to the first embodiment of the present application.

[0022] Figure 2 is a schematic diagram of the top view structure of the display panel according to the first embodiment of the present application.

[0023] Figure 3 is a schematic diagram of the connection relationship of the sensing unit circuit according to the first embodiment of the present application.

[0024] Figure 4 is a schematic diagram of the front view structure of the display panel according to the second embodiment of the present application.

[0025] Figure 5 is a schematic diagram of the structure of the display device according to the embodiment of the present application.

[0026] Figure 6 is a schematic diagram of the structure of the mobile terminal according to the embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0028] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated thereby. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0029] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "over" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the particular examples are described in the following disclosure. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application can repeatedly refer to reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate a relationship between the various embodiments and / or arrangements being discussed. Furthermore, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0032] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 and Figure 2 respectively show the front view structural schematic diagram and the top view structural schematic diagram of the display panel 100 provided by the first embodiment according to the present application, from which the components of the first embodiment according to the present application and the relative position relationship of the components can be directly seen.

[0033] As shown in Figure 1 and Figure 2 , the display panel 100 at least includes a substrate 160, a wiring layer 110 and a cover structure 120, and next, the components in the display panel 100 are described in detail in combination with Figure 1 and Figure 2 .

[0034] The substrate 160 has a display area A and a fan-out area F arranged adjacently, the wiring layer 110 is arranged on the substrate 160 and located in the fan-out area F, and the wiring layer 110 at least includes a plurality of sensing read lines 111 arranged periodically and a plurality of pixel data lines 112.

[0035] It should be noted that in the embodiment of the present application, the display panel 100 is an in-cell touch display panel, that is, a sensor unit (Sensor) for positioning touch operation is arranged in the display panel 100, specifically, the display area A of the display panel 100 is provided with a plurality of sensing unit circuits 130 and a plurality of pixel unit circuits 140 arranged in an array, wherein each sensing read line 111 is coupled with the plurality of sensing unit circuits 130, and each pixel data line 112 is coupled with the plurality of pixel unit circuits 140. Further, the sensing read line 111 is configured to position the touch operation issued by the user according to the current in the sensing unit circuit 130 coupled therewith, and the pixel data line 112 is configured to charge the pixel unit circuit 140 coupled therewith by using the received data signal.

[0036] The cover structure 120 is arranged in a layer different from the wiring layer 110 and is located in the fan-out area F. A projection of the cover structure 120 on the substrate 160 covers a projection of the sensing read line 111 on the substrate 160. The cover structure 120 is configured to have a floating potential. Further, the cover structure 120 and the sensing read line 111 are separated by the dielectric layer 150.

[0037] Specifically, the cover structure 120 can be made of a metal such as silver (Ag), aluminum (Al), nickel (Ni), chromium (Cr), molybdenum (Mo), copper (Cu), tungsten (W), titanium (Ti), or a combination thereof, or a transparent metal oxide such as indium tin oxide (ITO).

[0038] It should be noted that, since the in-plane touch display panel needs to add the sensing unit circuit 130 in the display panel 100, the sensing read line 111 needs to be correspondingly added in the fan-out area F of the substrate 160. Further, since the size of the fan-out area F of the display panel 100 cannot be designed too large, the distance between the sensing read line 111 and the adjacent pixel data line 112 is designed to be relatively small. Further, since the electrical signals transmitted on the sensing read line 111 and the pixel data line 112 are different, the distance between the sensing read line 111 and the adjacent pixel data line 112 is relatively small, which results in a relatively large capacitance, thereby affecting the signal-to-noise ratio (SNR) during signal transmission.

[0039] Now, referring back to Figure 1 In this embodiment, since the cover structure 120 is added above the projection of the sensing read line 111 and the potential of the cover structure 120 is configured to be floating, when electrical signals are transmitted on the sensing read line 111 and the pixel data line 112, a shielding electric field is formed between the cover structure 120 and the sensing read line 111. The shielding electric field can reduce the capacitance between the sensing read line 111 and the adjacent pixel data line 112, thereby effectively improving the signal-to-noise ratio during signal transmission.

[0040] Further, please continue to refer to Figure 1 In this embodiment, as shown in Figure 1 The distance between the sensing read line 111 and the adjacent pixel data line 112 is the first distance L1, and the distance between the adjacent pixel data lines 112 is the second distance L2. The first distance L1 is greater than the second distance L2. It should be noted that increasing the distance between the sensing read line 111 and the adjacent pixel data line 112 can further improve the capacitance between the sensing read line 111 and the adjacent pixel data line 112 and improve the signal-to-noise ratio during signal transmission.

[0041] It should be noted that in other variations of the present invention, if the shielding electric field formed between the cover structure 120 and the sensing readout line 111 is sufficient to enable a better signal-to-noise ratio during signal transmission, then the sensing readout line 111 and the multiple pixel data lines 112 can be arranged at equal intervals, and the widths of the sensing readout line 111 and the multiple pixel data lines 112 can be made equal to ensure the uniformity of signal transmission in the display panel 100.

[0042] It should be understood that, in one variation of the present invention, the sensing readout lines and multiple pixel data lines can be arranged at equal intervals, and the widths of the sensing readout lines and multiple pixel data lines are not equal. In another variation of the present invention, the sensing readout lines and multiple pixel data lines can be arranged at unequal intervals, and the widths of the sensing readout lines and multiple pixel data lines are equal. The present invention does not limit the above features and combinations thereof.

[0043] Further, please refer to Figure 3 , Figure 3 A schematic diagram showing the connection relationship of the sensing unit circuit 130 provided according to the first embodiment of the present invention is shown.

[0044] The sensing unit circuit 130 is a circuit composed of a thin-film transistor (TFT), further, as... Figure 3 As shown, the sensing unit circuit 130 is coupled to the first power line SVDD, the second power line SVGG, and the sensing readout line 111. Specifically, the first power line SVDD is configured to apply a driving voltage to the sensing unit circuit 130, and the second power line SVGG is configured to apply a fixed voltage to the sensing unit circuit 130. When the sensing unit circuit 130 is touched by, for example, a remote laser, the phototransistor in the sensing unit circuit 130 will generate a photocurrent, which will further change the capacitance value of the capacitor in the sensing unit circuit 130. The change will be acquired by the sensing readout line 111 and reflected in the corresponding processing circuit. Then, the processing circuit will locate the laser touch.

[0045] According to the foregoing, the first embodiment of the present application provides a display panel 100, the display panel 100 at least comprising a substrate 160, a wiring layer 110 and a cover structure 120, wherein the substrate 160 is provided with a fan-out area F, the wiring layer 110 is arranged on the substrate 160 and located within the fan-out area F, the wiring layer 110 at least comprises a periodic arrangement of a sensing read line 111 and a plurality of pixel data lines 112, the cover structure 120 is arranged in a layer different from the wiring layer 110, and the orthogonal projection of the cover structure 120 on the substrate 160 covers the orthogonal projection of the sensing read line 111 on the substrate 160, and the potential of the cover structure 120 is configured to be floating. The display panel 100 provided by the present application adds the cover structure 120 above the projection of the sensing read line 111, and configures the potential of the cover structure 120 to be floating. Therefore, when an electrical signal is transmitted on the sensing read line 111 and the pixel data line 112, a shielding electric field is formed between the cover structure 120 and the sensing read line 111. The shielding electric field can reduce the capacitance between the sensing read line 111 and the adjacent pixel data line 112, thereby effectively improving the signal-to-noise ratio during signal transmission.

[0046] Please refer to Figure 4 , Figure 4 The orthogonal projection structure diagram of the display panel 200 provided by the second embodiment of the present application is shown. From the diagram, the components of the second embodiment of the present application and the relative positional relationship between the components can be intuitively seen.

[0047] As Figure 1 and Figure 4 shown, the structure of the second embodiment is substantially the same as that of the first embodiment described above. In the second embodiment, the wiring layer 210 (including the sensing read line 211 and the pixel data line 212), the cover structure 220, the dielectric layer 250 and the substrate 260 have the same functions and are arranged in the same positions as the wiring layer 110 (including the sensing read line 111 and the pixel data line 112), the cover structure 120, the dielectric layer 150 and the substrate 160 in the first embodiment.

[0048] The difference between the two embodiments is that, in the present embodiment, the wiring layer 210 of the display panel 200 further comprises a plurality of virtual signal lines 213 arranged in the fan-out area F. Further, the plurality of virtual signal lines 213, the sensing read line 211 and the plurality of pixel data lines 212 are arranged in the same layer. The virtual signal lines 213 are located between the sensing read line 211 and the pixel data line 212, and the potential of the virtual signal lines 213 is configured to be floating.

[0049] It should be noted that in the embodiment, the virtual signal line 213 added between the sensing read line 211 and the pixel data line 212 corresponds to a shielding structure, which can prevent the signals transmitted in the sensing read line 211 and the pixel data line 212 from interfering with each other, and the distance between the sensing read line 211 and the adjacent pixel data line 212 can be enlarged by the virtual signal line 213, so as to reduce the capacitance between the sensing read line 211 and the adjacent pixel data line 212, and effectively improve the signal-to-noise ratio during signal transmission.

[0050] Further, please continue to refer to Figure 4 In the embodiment, the plurality of virtual signal lines 213 include a first virtual signal line (not shown) and a second virtual signal line (not shown), and the first virtual signal line and the second virtual signal line are symmetrically arranged on both sides of the same sensing read line 211. It should be noted that such an arrangement can ensure that the capacitances formed between the same sensing read line 211 and the pixel data lines 212 located on both sides thereof are equal, thereby ensuring the uniformity of signal transmission and improving the quality of signal transmission.

[0051] Further, please continue to refer to Figure 4 In the embodiment, the orthogonal projection of the covering structure 220 on the substrate 260 also covers the orthogonal projection of the virtual signal line 213 on the substrate 260, and the orthogonal projection of the covering structure 220 on the substrate 260 also covers the orthogonal projection of the interval between the virtual signal line 213 and the sensing read line 211 on the substrate 260. It should be noted that such an arrangement can further improve the range covered by the shielding electric field described above, so as to further improve the signal-to-noise ratio during signal transmission.

[0052] Further, please continue to refer to Figure 4 In order to ensure the uniformity of signal transmission in the display panel 200, as shown in Figure 4 In the embodiment, the widths of the sensing read line 211, the pixel data line 212, and the virtual signal line 213 are equal and are arranged at equal intervals.

[0053] It should be understood that in a variant according to the present application, the sensing read line, the pixel data line, and the virtual signal line can be arranged at equal intervals, and the widths of the sensing read line, the pixel data line, and the virtual signal line are not completely equal. In another variant according to the present application, the sensing read line, the pixel data line, and the virtual signal line can not be arranged at equal intervals, and the widths of the sensing read line, the pixel data line, and the virtual signal line are equal. The present application does not limit the above features and combinations thereof.

[0054] Please refer to Figure 5 , Figure 5The structural schematic diagram of the display device 300 according to the embodiment of the present application is shown, from which the components of the embodiment of the present application and the relative position relationship between the components can be directly observed.

[0055] As shown in Figure 5 , the display device 300 comprises a display panel 310 and a backlight source 320, wherein the display panel 310 can be the display panel 100 as described in the first embodiment above or the display panel 200 as described in the second embodiment above, and the backlight source 320 is connected with the display panel 310 and used to provide back light for the display panel 310.

[0056] Please refer to Figure 6 , Figure 6 , the structural schematic diagram of the mobile terminal 400 according to the embodiment of the present application is shown, the display device 300 is applied to the mobile terminal 400, and the mobile terminal 400 can be a smart phone or a tablet computer, from which the components of the present application and the relative position relationship between the components can be directly observed.

[0057] As shown in Figure 6 , the mobile terminal 400 comprises a processor 401 and a memory 402, wherein the processor 401 is electrically connected with the memory 402.

[0058] The processor 401 is the control center of the mobile terminal 400, connects each part of the mobile terminal through various interfaces and lines, executes various functions of the mobile terminal and processes data by running or loading the application stored in the memory 402 and calling the data stored in the memory 402, so as to monitor the mobile terminal as a whole.

[0059] In addition to the above embodiments, the present application can also have other implementation manners. Any technical solution formed by equivalent replacement or equivalent substitution falls within the protection scope of the present application.

[0060] In conclusion, although the preferred embodiments of the present application have been disclosed above, the above preferred embodiments are not used to limit the present application, and any modification and decoration within the spirit and scope of the present application can be made by those skilled in the art, therefore the protection scope of the present application is subject to the scope defined by the claims.

Claims

1. A display panel, characterized by, The display panel at least comprises: a substrate provided with a fan-out area; a trace layer disposed on the substrate and located in the fan-out area, the trace layer at least comprising a plurality of periodically arranged sensing read lines and a plurality of pixel data lines, and the plurality of pixel data lines and the sensing read lines are in the same layer; and a cover structure disposed in a layer different from the trace layer, and a projection of the cover structure on the substrate covers a projection of the sensing read line on the substrate, and a potential of the cover structure is configured to be floating.

2. The display panel of claim 1, wherein, The display panel further comprises a plurality of virtual signal lines disposed in the fan-out area, the virtual signal lines are located between the sensing read lines and the pixel data lines, and a potential of the virtual signal lines is configured to be floating.

3. The display panel of claim 2, wherein, The plurality of virtual signal lines comprises a first virtual signal line and a second virtual signal line, and the first virtual signal line and the second virtual signal line are symmetrically disposed on both sides of the same sensing read line.

4. The display panel of claim 2, wherein, The projection of the cover structure on the substrate further covers a projection of the virtual signal line on the substrate, and the projection of the cover structure on the substrate further covers a projection of a spacing between the virtual signal line and the sensing read line on the substrate.

5. The display panel of claim 2, wherein, The sensing read line, the pixel data line and the virtual signal line have equal widths; and / or The sensing read line, the pixel data line and the virtual signal line are equally spaced.

6. The display panel of claim 2, wherein, The plurality of virtual signal lines, the sensing read line and the plurality of pixel data lines are disposed in the same layer.

7. The display panel of claim 1, wherein, The sensing read line and the adjacent pixel data line have a first distance, and the adjacent pixel data lines have a second distance, wherein the first distance is greater than the second distance.

8. The display panel of claim 1, wherein, The material of the cover structure comprises metal or metal oxide.

9. The display panel of claim 1, wherein, Each sensing read line is electrically connected to a plurality of sensing unit circuits, and each pixel data line is electrically connected to a plurality of pixel unit circuits, wherein the plurality of sensing unit circuits and the plurality of pixel unit circuits are arranged in an array in a display area of the display panel.

10. A display device, characterized by comprising: The display panel at least comprises: a substrate provided with a fan-out area; a trace layer disposed on the substrate and located in the fan-out area, the trace layer at least comprising a plurality of periodically arranged sensing read lines and a plurality of pixel data lines, and the plurality of pixel data lines and the sensing read lines are in the same layer; and a cover structure disposed in a layer different from the trace layer, and a projection of the cover structure on the substrate covers a projection of the sensing read line on the substrate, and a potential of the cover structure is configured to be floating. The display panel further comprises a plurality of virtual signal lines disposed in the fan-out area, the virtual signal lines are located between the sensing read lines and the pixel data lines, and a potential of the virtual signal lines is configured to be floating. The display panel at least comprises: a substrate provided with a fan-out area; a trace layer disposed on the substrate and located in the fan-out area, the trace layer at least comprising a plurality of periodically arranged sensing read lines and a plurality of pixel data lines, and the plurality of pixel data lines and the sensing read lines are in the same layer; and a cover structure disposed in a layer different from the trace layer, and a projection of the cover structure on the substrate covers a projection of the sensing read line on the substrate, and a potential of the cover structure is configured to be floating. The display panel further comprises a plurality of virtual signal lines disposed in the fan-out area, the virtual signal lines are located between the sensing read lines and the pixel data lines, and a potential of the virtual signal lines is configured to be floating. The display panel at least comprises: a substrate provided with a fan-out area; a trace layer disposed on the substrate and located in the fan-out area, the trace layer at least comprising a plurality of periodically arranged sensing read lines and a plurality of pixel data lines, and the plurality of pixel data lines and the sensing read lines are in the same layer; and a cover structure disposed in a layer different from the trace layer, and a projection of the cover structure on the substrate covers a projection of the sensing read line on the substrate, and a potential of the cover structure is configured to be floating. The display panel further comprises a plurality of virtual signal lines disposed in the fan-out area, the virtual signal lines are located between the sensing read lines and the pixel data lines, and a potential of the virtual signal lines is configured to be floating.

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