Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a compensation circuit, an array substrate, a common electrode layer and a feedback wiring layer, the feedback wiring layer and the common electrode layer are arranged in the thickness direction of the display panel in a spaced mode, and the common electrode layer and the feedback wiring layer are arranged on the array substrate; the display panel further comprises a display area and a GDL area. The common electrode layer comprises a common electrode wire, and the common electrode wire is used for providing a common voltage signal for pixels in a display area of the display panel; the feedback wiring layer comprises a common electrode feedback line, and in the thickness direction of the display panel, the common electrode feedback line and the common electrode line are oppositely arranged at an interval; the common electrode feedback line senses the voltage fluctuation of the common electrode line based on the parasitic capacitance, the common electrode feedback line is electrically connected with the compensation circuit, and the compensation circuit is used for compensating the common voltage signal according to the voltage fluctuation. According to the technical scheme, the display quality of the display panel can be improved.

Description

TECHNICAL FIELD

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

[0002] With the wide application of thin film transistor liquid crystal display (TFT-LCD) in the fields of television, mobile phone and notebook computer, people have put forward higher requirements on the display quality of liquid crystal display. High resolution, high color gamut, fast response speed, wide viewing angle, picture stability and the like are the research and development direction and key point of new technology and new product.

[0003] In a less gate driver less (GDL) area, the common electrode line, the common electrode feedback line and other wires are usually arranged in the same layer and the same material. With the increasing demand of users for narrow frame of display device, the width of the GDL area is becoming narrower and narrower, the coupling between adjacent wires is becoming more and more serious, the common electrode feedback line signal is interfered by the adjacent wire signal on the horizontal plane, and the common electrode feedback line is used for sensing (or monitoring) the voltage fluctuation of the common electrode line and transmitting to the compensation circuit. When the input signal is abnormal, the compensation function of the compensation circuit for the common electrode line is invalid, thereby affecting the display quality. SUMMARY

[0004] Therefore, the present application provides a display panel and a display device for improving the display quality.

[0005] In order to achieve the above purpose, in a first aspect, the present application provides a display panel, comprising: a compensation circuit, an array substrate, a common electrode layer and a feedback wire layer which is arranged in the thickness direction of the display panel and is spaced apart from the common electrode layer, the common electrode layer and the feedback wire layer are arranged on the array substrate; the display panel further comprises a display area and a GDL area, the GDL area is located on the opposite sides of the display area.

[0006] The common electrode layer comprises a common electrode line, the common electrode line is used for providing a common voltage signal to a pixel in the display area of the display panel.

[0007] The feedback wire layer comprises a common electrode feedback line, the common electrode feedback line is arranged opposite to and spaced apart from the common electrode line in the thickness direction of the display panel; in the display area and the GDL area, the opposite area of the common electrode line and the common electrode feedback line is at least greater than half of the area of the common electrode feedback line; the common electrode feedback line senses voltage fluctuation of the common electrode line based on parasitic capacitance, the common electrode feedback line is electrically connected with the compensation circuit, and the compensation circuit is used for compensating the common voltage signal according to the voltage fluctuation.

[0008] In a possible implementation of the first aspect, in the display area: the common electrode feedback line is at least three, a plurality of common electrode feedback lines are arranged along a first direction and extend along a second direction; the first direction is perpendicular to the second direction, and the second direction is parallel to the arrangement direction of the display area and the GDL area.

[0009] In a possible implementation of the first aspect, in the GDL area: the orthographic projection of at least the three common electrode feedback lines on the array substrate is located in the orthographic projection of at least the three common electrode lines on the array substrate.

[0010] In a possible implementation of the first aspect, the common electrode feedback line comprises a first feedback line segment and a second feedback line segment; the GDL area is provided with the first feedback line segment, and the orthographic projection of the first feedback line segment on the array substrate is located in the orthographic projection of the common electrode line on the array substrate; the display area is provided with a plurality of second feedback line segments arranged along a first direction and extending along a second direction;

[0011] The display panel further comprises a plurality of scan lines and a plurality of switching tubes; the plurality of scan lines are arranged along a first direction and extend along a second direction; the first end of each of the switching tubes is connected to the first feedback line segment, the second end of each of the switching tubes is connected to the second feedback line segment one by one, and the control end of each of the switching tubes is connected to the nearest scan line.

[0012] In a possible implementation of the first aspect, the common voltage is compensated based on the average sensing result of at least three common electrode feedback lines; or, the common electrode layer at the corresponding position is compensated based on the respective sensing result of at least three common electrode feedback lines.

[0013] In a possible implementation of the first aspect, the display panel further includes a touch control layer, the touch control layer includes a sensing electrode layer and a transmitting electrode layer, and the feedback wiring layer at least multiplexes one of the sensing electrode layer and the transmitting electrode layer; a working period of the display panel includes a touch control period and a display period, in the touch control period, the feedback wiring layer is used for sensing voltage fluctuation of the common electrode layer, and in the display period, the feedback wiring layer is used for performing touch control functions.

[0014] In a possible implementation of the first aspect, the feedback wiring layer multiplexes the transmitting electrode layer; the display panel further includes a color film substrate oppositely arranged with the array substrate, the common electrode layer and the transmitting electrode layer are sequentially arranged on a side of the array substrate facing the color film substrate, and the sensing electrode layer is arranged on the color film substrate; the transmitting electrode layer includes a plurality of transmitting electrodes arranged at intervals along a first direction and extending along a second direction, and the plurality of common electrode feedback lines at least multiplex the plurality of transmitting electrodes respectively; the sensing electrode layer includes a plurality of sensing electrodes arranged at intervals along the second direction and extending along the first direction.

[0015] In a possible implementation of the first aspect, each of the sensing electrodes is multiplexed by the common electrode feedback line.

[0016] The display panel provided by the embodiments of the present application includes a compensation circuit, an array substrate, a common electrode layer, and a feedback wiring layer arranged at intervals in the thickness direction of the display panel, the common electrode layer and the feedback wiring layer are arranged on the array substrate; the display panel further includes a display area and a GDL area, the GDL area is located on two opposite sides of the display area; the common electrode layer includes a common electrode line, the common electrode line is used for providing a common voltage signal to pixels in the display area of the display panel; the feedback wiring layer includes a common electrode feedback line, in the thickness direction of the display panel, the common electrode feedback line is arranged at intervals opposite to the common electrode line; in the display area and the GDL area, the opposite area of the common electrode line and the common electrode feedback line is at least greater than one half of the area of the common electrode feedback line; the common electrode feedback line senses voltage fluctuation of the common electrode line based on a parasitic capacitance, the common electrode feedback line is electrically connected with the compensation circuit, and the compensation circuit is used for compensating the common voltage signal according to the voltage fluctuation. Through the above implementation, the common electrode feedback line can sense the common voltage signal through the parasitic capacitance, and meanwhile, the influence of signals of adjacent signal lines on the sensing result of the common electrode feedback line can be reduced, so that the compensation accuracy of the compensation circuit to the common voltage signal can be improved, and the display quality can be improved.

[0017] In a second aspect, an embodiment of the present application provides a display device, comprising: the display panel described in the first aspect or any possible implementation manner of the first aspect and a backlight module arranged opposite to the display panel, wherein the backlight module is used to provide backlight to the display panel.

[0018] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the waveform of the voltage feedback signal under ideal and actual conditions;

[0020] Figure 2 A schematic top view of a common electrode feedback line and a common electrode line provided in an embodiment of the present application;

[0021] Figure 3 for Figure 2 A schematic cross-sectional view along section line A-A';

[0022] Figure 4 A schematic diagram of the position of the common electrode feedback line in the display area provided in an embodiment of the present application;

[0023] Figure 5 A schematic top view of a common electrode feedback line provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a common electrode feedback line multiplexed as a transmitting electrode provided in an embodiment of the present application;

[0025] Figure 7 for Figure 6 A schematic cross-sectional view of the display area along the section line BB' is provided;

[0026] Figure 8 A schematic diagram of a structure in which a common electrode feedback line is multiplexed as a sensing electrode and a common electrode line is multiplexed as a transmitting electrode provided in an embodiment of the present application;

[0027] Figure 9 for Figure 8 A schematic cross-sectional view of the display area along the section line EE' is provided;

[0028] Figure 10 A comparison chart of the sensing results of the prior art and the present solution provided in the embodiments of the present application;

[0029] Figure 11 A schematic structural diagram of a display device provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100 - display panel; 101 - display area; 102 - GDL area;

[0032] 110 - common electrode layer; 111 - common electrode line; 120 - feedback trace layer; 121 - common electrode feedback line; 1211 - first feedback line segment; 1212 - second feedback line segment; 130 - compensation circuit;

[0033] 140 - array substrate; 150 - switch tube; 160 - touch layer; 161 - sensing electrode layer; 162 - transmitting electrode layer;

[0034] 170 - color film substrate;

[0035] 200 - backlight module. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described below in conjunction with the accompanying drawings of the embodiments of the present application. The terms used in the implementation manner part of the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0037] The TFT display panel (hereinafter referred to as display panel) is a matrix active driving device, and the GDL area is provided with various traces such as periodic signal lines, gate lines and common electrode lines (Vcom Line) to transmit various signals required for display picture. Among them, the periodic signal lines can include but are not limited to clock signal lines, frame start signal lines and power voltage signal lines, etc. The signal lines are made of metal, and are separated by inorganic insulating film layer in the middle to be insulated. The double-layer metal and the inorganic insulating film layer in the middle constitute a parasitic capacitance (including overlapping capacitance and lateral capacitance), which will cause the voltage signals on different metal lines to be coupled and deviate from the set value.

[0038] In an ideal state, the sensing result of the common electrode feedback line (Vcom Feedback Line) is similar to a square wave signal, referring to Figure 1 (a). However, in the existing in-plane design, the common electrode line, the periodic signal line and the common electrode feedback line are usually arranged in the same layer, and the sensing result of the common electrode feedback line will be disturbed by the same layer trace, resulting in result deviation, referring to Figure 1 (b), which will affect the input of the compensation circuit, causing the compensation accuracy of the compensation circuit to the common voltage signal to decrease, resulting in technical problems such as Excel crosstalk, character crosstalk and common voltage fluctuation flicker.

[0039] Therefore, the display panel provided in the embodiments of the present application can include a compensation circuit, an array substrate, a common electrode layer, and a feedback trace layer arranged in a thickness direction of the display panel and spaced apart from the common electrode layer. The common electrode layer and the feedback trace layer are arranged on the array substrate. The display panel further includes a display area and a GDL area located on opposite sides of the display area. The common electrode layer includes a common electrode line configured to provide a common voltage signal to pixels in the display area of the display panel. The feedback trace layer includes a common electrode feedback line arranged opposite and spaced apart from the common electrode line in the thickness direction of the display panel. In the display area and the GDL area, the opposite area (or the facing area) of the common electrode line and the common electrode feedback line is at least greater than one half of the area of the common electrode feedback line. The common electrode feedback line senses voltage fluctuation of the common electrode line based on parasitic capacitance. The common electrode feedback line is electrically connected to the compensation circuit, and the compensation circuit can compensate the common voltage signal according to the voltage fluctuation.

[0040] The embodiments of the present application are described below with reference to the accompanying drawings.

[0041] Figure 2 A top view of the common electrode feedback line and the common electrode line provided in the embodiments of the present application is shown. Figure 3 For Figure 2 A cross-sectional view along the cross-sectional line A-A’ is shown. As Figure 2 and Figure 3 shown, the display panel 100 can include a display area 101 and a GDL area 102. The GDL area 102 can be located on opposite sides of the display area 101, and the embodiments of the present application take the GDL area 102 located on the left and right sides of the display area 101 as an example.

[0042] Referring to Figure 2 and Figure 3 , in a thickness direction (Z direction in the figure, X direction, Y direction and Z direction are perpendicular to each other) of the display panel 100, the display panel 100 can further include a common electrode layer 110 and a feedback trace layer 120. The feedback trace layer 120 can be arranged spaced apart from the common electrode layer 110 to reduce the number of traces in the same layer, reduce the influence of other traces in the same layer on the feedback trace layer 120, and improve the use reliability of the display panel 100. The common electrode layer 110 and the feedback trace layer 120 can be formed on the array substrate 140 to reduce the preparation difficulty.

[0043] The common electrode layer 110 can include a common electrode line 111, which in some embodiments can be arranged in a mesh structure to enhance the bending resistance and heat dissipation of the common electrode layer 110, and to improve the anti-interference capability. The feedback wiring layer 120 can include a common electrode feedback line 121, and the common electrode line 111 and the common electrode feedback line 121 can be oppositely and spacedly arranged. The common electrode line 111 can provide a common voltage signal to the pixels in the display area 101, and the common electrode feedback line 121 can sense the voltage fluctuation of the common electrode line 111 based on the parasitic capacitance between the common electrode feedback line 121 and the common electrode line 111.

[0044] The common electrode line 111 and the common electrode feedback line 121 are oppositely and spacedly arranged along the Z direction to form a parasitic capacitance, so that when the common voltage signal fluctuates, the parasitic capacitance can be coupled to the common electrode feedback line 121. In addition, the opposite arrangement can increase the relative area of the common electrode line 111 and the common electrode feedback line 121, and can increase the capacitance value of the parasitic capacitance, so that the common electrode feedback line 121 can more accurately sense the voltage fluctuation (or distortion) of the common voltage signal, and can also reduce the interference of other signal lines on the common electrode feedback line 121, thereby improving the correlation between the sensing result and the common voltage signal, and further improving the sensing accuracy.

[0045] The common electrode feedback line 121 can be electrically connected to a compensation circuit 130, and the compensation circuit 130 can compensate the common voltage signal according to the voltage fluctuation transmitted by the common electrode feedback line 121. In some embodiments, the compensation circuit 130 can be an operational amplifier integrated circuit. The input end of each common electrode feedback line 121 can be grounded, and the output end can be electrically connected to the input end of the operational amplifier integrated circuit, which can reduce the influence of adjacent signal lines on the sensing result, so as to facilitate the compensation of the operational amplifier integrated circuit for the common voltage signal.

[0046] In some other embodiments, the input end of the common electrode feedback line 121 can also be connected to the ground end of the operational amplifier integrated circuit to simplify the circuit structure. The operational amplifier integrated circuit can be arranged at any position of the display panel 100. For example, the operational amplifier integrated circuit can be integrated on a printed circuit board (PCB), and the common electrode feedback line 121 can be directly connected to the operational amplifier integrated circuit on the PCB after passing through the film. This not only realizes circuit integration and miniaturization, but also reduces the contact coupling with other wires, and ensures the accuracy and stability of signal transmission.

[0047] Exemplarily, the display panel 100 can further be provided with a common compensation signal line electrically connected with the compensation circuit 130. The compensation circuit 130 can compensate the common voltage signal in the display area 101 through the common compensation signal line to maintain the normal display required common voltage. For example, when the waveform of the common voltage signal fluctuates upward relative to the voltage of the balance point of the common voltage signal, the compensation circuit 130 can adopt a reverse amplification compensation manner to pull the common voltage signal back to the balance point, so as to reduce the occurrence of Excel crosstalk, text crosstalk and common voltage fluctuation screen and the like. The common compensation signal line can be electrically connected with the common electrode layer 110 of the GDL area 102, that is, the common electrode layer 110 of the GDL area 102 serves as the signal input structure of the common electrode layer 110 of the display area 101.

[0048] In order to improve the sensing accuracy of the common electrode feedback line 121 for sensing the common voltage signal, in some embodiments, the relative area of the common electrode line 111 to the opposite common electrode feedback line 121 in the display area 101 and the GDL area 102 can be at least greater than one half of the area of the common electrode feedback line 121, so as to further increase the sensing area and improve the sensing accuracy.

[0049] In an optional implementation, in the display area 101, the common electrode feedback line 121 can be provided as a plurality of lines, such as Figure 2 at least three lines. The common electrode feedback line 121 can include FB1, FB2 and FB3, and the FB1, FB2 and FB3 are located at different positions of the display area 101, so as to increase the area of the sensing area.

[0050] In the display area 101, referring to Figure 2 and Figure 4 , the plurality of common electrode feedback lines 121 can be arranged at intervals along a first direction (X direction in the figure) and can extend along a second direction (Y direction in the figure). The first direction can be perpendicular to the second direction, and the second direction can be parallel to the arrangement direction of the display area 101 and the GDL area 102.

[0051] The common electrode layer 110 can include a plurality of common electrode lines 111, for example Figure 2Vcom1, Vcom2 and Vcom3. By setting at least three common electrode feedback lines 121 (FB1, FB2 and FB3) corresponding to the common electrode lines 111, the common electrode feedback lines 121 can sense the voltage fluctuation of the common electrode lines 111 at different positions (including the display area 101 and the GDL area 102), for example, FB1 senses the voltage fluctuation of the corresponding Vcom1, and the sensing result can be transmitted to the compensation circuit 130, and the compensation circuit 130 can compensate the common voltage of Vcom1 according to the sensing result to offset the voltage distortion, so as to improve the sensing reliability of the common electrode feedback lines 121, and further realize the partition compensation of the common electrode layer 110. The common electrode lines 111 and the corresponding common electrode feedback lines 121 have the same extension direction, so as to increase the relative area of the common electrode feedback lines 121 and the corresponding common electrode lines, and improve the sensing accuracy.

[0052] It can be understood that in the display area shown in Figure 2 The position of the common electrode line 111 in the display area shown in FIG. 1 is only exemplary. In different embodiments, the position of the common electrode line 111 is not fixed and can be arranged at other positions according to specific design requirements. Meanwhile, the setting direction of the common electrode line 111 is not limited by the example in the figure and can be adjusted flexibly according to the actual situation, as long as the opposite area of the common electrode line 111 and the corresponding common electrode feedback line 121 is greater than one half to ensure the stability and reliability of the sensing. For example, in some specific scenarios (for example, scenarios that partially pursue high light transmittance or uniform electric field distribution), the common electrode line 111 can be set in a mesh structure to achieve more optimized display effect to meet special performance requirements or design concepts.

[0053] In some embodiments, the plurality of common electrode feedback lines 121 can be electrically connected to the input end of the same compensation circuit 130, which can simplify the circuit and avoid the congestion problem caused by the setting of multiple compensation circuits 130, and is helpful to reduce the area of the GDL area 102. On the other hand, compared with the cooperative processing of multiple compensation circuits 130, connecting the plurality of common electrode feedback lines 121 to the same compensation circuit 130 can reduce the difficulty of data processing, reduce the preparation cost, and improve the stability of the common voltage signal.

[0054] For the above-mentioned embodiments, when performing compensation on the common voltage signal, the compensation circuit 130 can compensate the common electrode lines 111 corresponding to the common electrode feedback lines 121 respectively according to the sensing results of the common electrode feedback lines 121, so that the compensation of the common voltage signal can be realized in a partitioned manner, the trade-off between the compensation accuracy and complexity can be effectively realized, and the display quality can be improved. In addition, through the redundant design of arranging at least three common electrode feedback lines 121 at different positions, it can be ensured that when one of the common electrode feedback lines 121 fails, the compensation circuit 130 can still maintain the basic function by relying on the other common electrode feedback lines 121, so that the reliability of the display panel 100 can be improved.

[0055] With reference to Figure 2 and Figure 3 In the GDL area 102, the orthographic projections of the at least three common electrode feedback lines 121 on the array substrate can be located in the orthographic projections of the at least three common electrode lines 111 on the array substrate, so that the common electrode feedback lines 121 can be conveniently prepared, the interference of other signal lines on the common electrode feedback lines 121 can be reduced, and the sensing area of the common electrode feedback lines 121 can be increased, so that the sensing accuracy can be improved.

[0056] In some embodiments, in the X direction, the plurality of common electrode lines 111 can be arranged in a partitioned manner. For example, referring to Figure 2 , the three common electrode lines 111 can be arranged in the upper part (such as the upper 1 / 3), the middle part (the middle 1 / 3 area), and the lower part (the lower 1 / 3 area) of the display panel 100 along the X direction. Correspondingly, the common electrode feedback lines 121 can also be arranged in different areas of the display panel 100. In the X direction, the three common electrode lines 111 can be arranged at equal intervals, so that the common electrode lines 111 can be conveniently prepared in the same layer, and the process complexity can be reduced.

[0057] Optionally, in the display area 101, the common electrode layer 110 can also include a plurality of electrode layer partitions, such as a top electrode layer partition, a middle electrode layer partition, and a lower electrode layer partition, which correspond to the common electrode lines 111 located in the upper part, the middle part, and the lower part, so that the resistance-capacitance delay caused by long-distance wiring can be reduced. The three common electrode lines 111 supply power to different electrode layer partitions in a partitioned manner, so that the voltage drop caused by the increase in the size of the display panel can be reduced, and the compensation circuit 130 can dynamically compensate the voltage fluctuation of different partitions according to the sensing results of different partitions, so that the voltage consistency of the top electrode layer partition, the middle electrode layer partition, and the lower electrode layer partition can be improved, and the display quality can be improved.

[0058] In another optional implementation, referring to Figure 5The common electrode feedback line 121 can include a first feedback line segment 1211 and a second feedback line segment 1212, and the number of the second feedback line segments 1212 can be multiple. The GDL area 102 can be provided with a first feedback line segment 1211, and the orthogonal projection of the first feedback line segment 1211 on the array substrate 140 can be located in the orthogonal projection of the common electrode line 111 on the array substrate, so that the first feedback line segment 1211 can be directly opposite to the common electrode line 111 in the GDL area 102. The display area 101 can be provided with multiple second feedback line segments 1212 arranged along the first direction and extending along the second direction, so as to increase the sensing area.

[0059] The display panel 100 can further include multiple scan lines (not shown) and multiple switch tubes 150, and the switch tubes 150 can correspond to the second feedback line segments 1212 one by one. The multiple scan lines can be arranged along the first direction and extend along the second direction.

[0060] The switch tube 150 can be a metal-oxide-semiconductor field effect transistor (MOS) or a bipolar junction transistor (BJT), etc. For the convenience of understanding, the switch tube 150 is taken as an NMOS in the following example.

[0061] For each switch tube 150, the first end (or drain) can be connected to the first feedback line segment 1211, the second end (or source) can be connected to the second feedback line segment 1212 one by one, and the control end can be electrically connected to the nearest scan line.

[0062] Taking the switch tube 150 as an N-channel metal-oxide-semiconductor field effect transistor (NMOS) as an example, the switch tube 150 has the characteristics of high-level conduction and low-level shutdown. For example, in the embodiment of the present application, when the scan line connected to the switch tube T1 is loaded with a high level, the switch tube T1 can be turned on under the action of the high level, so that the source and drain of the switch tube T1 can be connected in series on the common electrode feedback line 121.

[0063] Through the above-mentioned embodiments, the on-off of each switch tube 150 can be controlled by using the working mode of row-by-row scanning of the scan line, so as to sense the voltage fluctuation of the common voltage signal in different areas of the display panel 100, and the interference between adjacent common electrode feedback lines 121 during the conduction time of the switch tube 150 can be reduced, and the sensing reliability of the common electrode feedback line 121 can be improved. In addition, the number of the common electrode feedback lines 121 in the GDL area 102 can also be effectively reduced, the circuit can be simplified, and the interference of other signal lines can be reduced.

[0064] In the above-described embodiment, when performing common voltage signal compensation, the compensation circuit 130 can generate a globally balanced control signal, such as a weighted average, based on the sensing results of the common electrode line feedback line through an algorithm. This allows the common voltage to be compensated based on the average sensing results of the common electrode line feedback line, thereby reducing the difficulty of compensation. Furthermore, a single common electrode feedback line 121 can only sense voltage fluctuations of a local common electrode line 111. By distributing multiple second feedback line segments 1212 at different locations and generating an average sensing result based on the sensing results of the common electrode feedback line 121, errors caused by "partial representation of the whole" can be avoided.

[0065] The common electrode lines 111 and the common electrode feedback lines 121 can be made of copper or a transparent conductive material, for example, indium tin oxide (ITO). Since ITO has high light transmittance and stable chemical properties, it can improve the light transmittance and reliability of the display panel 100.

[0066] It is understandable that Figures 3-5 The feedback wiring layer 120 may be located above the common electrode layer 110. In some embodiments, the feedback wiring layer 120 may also be located below the common electrode layer 110. The number of common electrode lines 111 and common electrode feedback lines 121 may be set according to actual needs.

[0067] The display panel 100 may be a touch display panel. Figure 6 and Figure 7 The display panel 100 may further include a touch layer 160, which may include a sensing electrode layer 161 and an emitting electrode layer 162. The feedback trace layer 120 may reuse at least one of the sensing electrode layer 161 and the emitting electrode layer 162. The operating period of the display panel 100 may include a touch period (also known as a data blank period) and a display period. During the touch period, the feedback trace layer 120 may be used to sense voltage fluctuations on the common electrode layer 110. During the display period, the feedback trace layer 120 may be used to perform touch functions.

[0068] For ease of understanding, the following explanation is given by taking the feedback wiring layer 120 multiplexing the emission electrode layer 162 as an example.

[0069] The common electrode feedback line 121 may reuse part of the emitting electrodes Tx of the emitting electrode layer 162 , or may reuse every emitting electrode Tx of the emitting electrode layer 162 , so as to increase the sensing area.

[0070] Continue reading Figure 6 and Figure 7The display panel 100 can further include a color filter substrate 170 opposite to the array substrate 140, and the common electrode layer 110 (not shown) and the emission electrode layer 162 can be sequentially arranged on a side of the array substrate 140 facing the color filter substrate 170, and the sensing electrode layer 161 can be arranged on the color filter substrate 170.

[0071] The emission electrode layer 162 can include a plurality of emission electrodes Tx arranged at intervals along a first direction and extending along a second direction, and the plurality of common electrode feedback lines 121 can at least multiplex the plurality of emission electrodes Tx respectively. The sensing electrode layer 161 can include a plurality of sensing electrodes Rx arranged at intervals along the second direction and extending along the first direction. The common electrode lines 111 can be connected in a mesh structure, so as to not only reduce the manufacturing cost, but also improve the anti-interference capability. In the extension direction of the emission electrode Tx, the emission electrode Tx is opposite to the common electrode line 111 extending along the Y direction, so as to increase the relative area.

[0072] In the display period, the common electrode feedback line 121 can take the voltage fluctuation of the sensing common electrode line 111 as an input signal of the compensation circuit 130, and compensate the display panel 100 through the reverse amplification compensation of the compensation circuit 130.

[0073] In the touch period, the common electrode feedback line 121 can be multiplexed as the emission electrode Tx, the emission electrode Tx can load a touch signal, and the common electrode feedback line 121 and the sensing electrode Rx can form a mutual capacitance C. When the user touches, the mutual capacitance C can change, the sensing electrode Rx can receive the change amount of the mutual capacitance C (referred to as a touch sensing signal), and output the touch sensing signal to a touch detection circuit (not shown) through the sensing electrode Rx. The touch detection circuit can determine the touch position according to the touch sensing signal.

[0074] The touch detection circuit can be integrated on the chip on film, so as to simplify the structure, protect the touch detection circuit by the chip on film, and reduce the risk of damage to the touch detection circuit.

[0075] Figure 7 The sensing electrode layer 161 is arranged on the lower surface of the color filter substrate 170 as an example, and it can be understood that the sensing electrode layer 161 can also be arranged on the upper surface of the color filter substrate 170, and the embodiments of the present application do not particularly limit this.

[0076] In some embodiments, the feedback wiring layer 120 can be multiplexed as the sensing electrode layer 161, and the common electrode layer 110 can be multiplexed as the transmitting electrode layer 162. The transmitting electrode layer 162 can include a plurality of transmitting electrodes Tx arranged at intervals along a first direction and extending along a second direction, and the plurality of common electrode lines 111 can at least multiplex the plurality of transmitting electrodes Tx respectively. The sensing electrode layer 161 can include a plurality of sensing electrodes Rx arranged at intervals along the second direction and extending along the first direction, and the plurality of common electrode feedback lines 121 can at least multiplex the plurality of sensing electrodes Rx respectively.

[0077] For example, referring to Figure 8 and Figure 9 During the display period, the transmitting electrodes Tx load the common voltage signal, and the sensing electrodes Rx can sense the voltage fluctuation of the common voltage signal and transmit the sensing result to the compensation circuit 130 as an input signal of the compensation circuit 130. The compensation circuit 130 can compensate the common voltage signal in a reverse amplification manner.

[0078] During the touch period, when the user touches, the capacitance C between the sensing electrodes Rx and the common electrode lines 111 changes, and the sensing electrodes Rx can receive the touch sensing signal generated due to the change of the capacitance C, so that the touch detection circuit can determine the touch position according to the touch sensing signal.

[0079] The embodiment of the present application can multiplex the common electrode feedback lines 121 and / or the common electrode lines 111 in the display panel 100 in time division, so that the same physical wiring can undertake different functions in different periods, thereby reducing the number of electrode layers, simplifying the stacking structure, and further optimizing the space utilization and reducing the manufacturing cost.

[0080] The common electrode feedback lines 121 can multiplex part of the sensing electrodes Rx of the sensing electrode layer 161, so that the number of multiplexed sensing electrodes Rx can be controlled to reduce the overall power consumption while meeting the performance requirements. The number of multiplexed sensing electrodes Rx can be set according to actual needs to adapt to different circuit designs and performance requirements. Of course,

[0081] The common electrode feedback lines 121 can also multiplex each sensing electrode Rx of the sensing electrode layer 161, so that the sensing electrode layer 161 can be fully utilized to avoid resource waste and improve the overall integration of the circuit.

[0082] Optionally, in the thickness direction of the display panel 100, the feedback wiring layer 120 can include multiple layers, and each feedback wiring layer 120 is arranged in a spaced manner. For example, the feedback wiring layer 120 can include two layers, and the common electrode layer 110 is located between the two feedback wiring layers 120. By arranging the feedback wiring layer 120 above and below the common electrode layer 110, the compensation circuit 130 can compensate the common voltage signal according to the sensing results of the upper and lower feedback wiring layers 120, so as to improve the compensation accuracy. In some embodiments, the number and position of the feedback wiring layer 120 can be set according to actual needs. For example, the feedback wiring layer 120 can also be arranged in three layers, and the three layers are arranged at the upper, middle and lower parts of the display panel 100. The present application does not make special limitations on this.

[0083] Figure 10 The present application provides a comparison chart of the sensing results of the present application and the prior art. Referring to FIG. 8, FB test1 represents the waveform curve when the common electrode feedback line and other wiring are arranged in the same layer in the prior art, and FB test2 represents the waveform curve when the common electrode feedback line and other wiring are arranged in the same layer in the present application. It is obvious that the sensing result waveform in the present application is smoother and basically free of burr and noise, which further proves the reliability of the scheme described in the present application. Figure 10

[0084] The present application provides a display panel, which includes a compensation circuit, an array substrate, a common electrode layer, and a feedback wiring layer arranged in a spaced manner in the thickness direction of the display panel. The common electrode layer and the feedback wiring layer are arranged on the array substrate. The display panel further includes a display area and a GDL area, and the GDL area is located on the opposite sides of the display area. The common electrode layer includes a common electrode line, and the common electrode line is used to provide a common voltage signal to a pixel in the display area of the display panel. The feedback wiring layer includes a common electrode feedback line, and in the thickness direction of the display panel, the common electrode feedback line is arranged in a spaced manner opposite to the common electrode line. In the display area and the GDL area, the opposite area of the common electrode line and the common electrode feedback line is at least greater than half of the area of the common electrode feedback line. The common electrode feedback line senses the voltage fluctuation of the common electrode line based on the parasitic capacitance, the common electrode feedback line is electrically connected with the compensation circuit, and the compensation circuit is used to compensate the common voltage signal according to the voltage fluctuation. By arranging the common electrode line and the common electrode feedback line in a non-same layer, the number of wiring in the same layer in the GDL area can be reduced, so that the common voltage signal of the common electrode line can be monitored, and the interference of other wiring on the common electrode feedback line can be reduced, thereby improving the correlation between the sensing result transmitted to the compensation circuit and the common voltage signal, improving the compensation accuracy of the compensation circuit to the common voltage signal, and further improving the display quality. ​

[0085] Based on the same inventive concept, the embodiment of the present application also provides a display device. Figure 11 The schematic diagram of the display device provided by the embodiment of the present application is shown in Figure 11 As shown in the figure, the display device can include a backlight module 200 and the display panel 100 described in any of the above embodiments, the backlight module 200 is arranged opposite to the display panel 100, and is used to provide backlight to the display panel 100.

[0086] Since the display device in the embodiment includes the display panel in the above embodiments, that is, the display device in the embodiment has all the technical features and technical effects of the above display panel embodiments, for details, please refer to the above embodiments, which will not be repeated here.

[0087] It should be understood that in the description of the present application and the appended claims, the terms "comprise", "contain", "have" and any variations thereof are intended to cover non-exclusive inclusion, and mean "including but not limited to", unless otherwise specifically emphasized.

[0088] In the description of the present application, unless otherwise specified, " / " represents that the objects before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present application is used to describe the relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, wherein A and B can be singular or plural.

[0089] And, in the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items.

[0090] In addition, in the description of the present application, it should be understood that the terms "vertical", "horizontal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0091] In the present application, unless specifically defined otherwise, the terms "connected", "connected to", and similar terms are used broadly and encompass both direct and indirect connections, as well as mechanical and electrical connections. In addition, the terms "connected" and "connected to" do not exclude the presence of intermediaries between the objects connected. Unless specifically stated otherwise, the terms "connected" and "connected to" do not exclude the presence of intermediaries between the objects connected.

[0092] In addition, in the description of the present application and the appended claims, the terms "first", "second", and the like are used to distinguish similar objects, and are not necessarily used to describe a particular order or sequence, nor to indicate or imply relative importance or a specific number of the technical features indicated. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein; the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0093] In the embodiments of the present application, the words "exemplarily" or "for example" and the like are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplarily" or "for example" and the like is intended to present the relevant concept in a specific manner.

[0094] In the present application, the reference "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: A compensation circuit, an array substrate, a common electrode layer, and a feedback wiring layer spaced apart from the common electrode layer in a thickness direction of the display panel, wherein the common electrode layer and the feedback wiring layer are provided on the array substrate; the display panel further comprises a display area and a GDL area, wherein the GDL area is located on opposite sides of the display area; The common electrode layer includes common electrode lines, and the common electrode lines are used to provide common voltage signals to pixels in a display area of ​​the display panel; The feedback routing layer includes a common electrode feedback line, which is opposite to and spaced from the common electrode line in the thickness direction of the display panel; in the display area and the GDL area, the relative area between the common electrode line and the common electrode feedback line is at least larger than half of the area of ​​the common electrode feedback line; the common electrode feedback line senses the voltage fluctuation of the common electrode line based on parasitic capacitance, and the common electrode feedback line is electrically connected to the compensation circuit, which is used to compensate for the common voltage signal according to the voltage fluctuation.

2. The display panel according to claim 1, wherein: In the display area: there are at least three common electrode feedback lines, and the multiple common electrode feedback lines are arranged at intervals along a first direction and extend along a second direction; the first direction is perpendicular to the second direction, and the second direction is parallel to the arrangement direction of the display area and the GDL area.

3. The display panel according to claim 2, wherein: In the GDL region: orthographic projections of at least the three common electrode feedback lines on the array substrate are respectively located within orthographic projections of at least the three common electrode lines on the array substrate.

4. The display panel according to claim 2, wherein: The common electrode feedback line includes a first feedback line segment and a second feedback line segment; the GDL area is provided with one first feedback line segment, and the orthographic projection of the first feedback line segment on the array substrate is located within the orthographic projection of the common electrode line on the array substrate; the display area is provided with a plurality of second feedback line segments arranged at intervals along the first direction and extending along the second direction; The display panel also includes multiple scan lines and multiple switching tubes; the multiple scan lines are arranged at intervals along the first direction and extend along the second direction; the first ends of all the switching tubes are connected to the first feedback line segment, the second end of each switching tube is connected to the second feedback line segment in a one-to-one correspondence, and the control end of each switching tube is connected to the scan line closest to it.

5. The display panel according to claim 2, wherein: The common voltage is compensated based on an average sensing result of at least three common electrode feedback lines; or, the common electrode layers at corresponding positions are compensated based on respective sensing results of at least three common electrode feedback lines.

6. The display panel according to claim 1, wherein: The display panel further includes a touch layer, which includes a sensing electrode layer and an emitting electrode layer. The feedback wiring layer reuses at least one of the sensing electrode layer and the emitting electrode layer. The operating period of the display panel includes a touch period and a display period. During the touch period, the feedback wiring layer is used to sense voltage fluctuations of the common electrode layer. During the display period, the feedback wiring layer is used to perform a touch function.

7. The display panel according to claim 6, wherein: The feedback routing layer reuses the emitting electrode layer; the display panel further includes a color filter substrate arranged in a box with the array substrate; the common electrode layer and the emitting electrode layer are sequentially arranged on a side of the array substrate facing the color filter substrate; the sensing electrode layer is provided on the color filter substrate; the emitting electrode layer includes a plurality of emitting electrodes spaced apart along a first direction and extending along a second direction, and the plurality of common electrode feedback lines reuse at least a plurality of the emitting electrodes respectively; the sensing electrode layer includes a plurality of sensing electrodes spaced apart along the second direction and extending along the first direction.

8. The display panel according to claim 6, wherein: The feedback routing layer reuses the sensing electrode layer, and the common electrode layer reuses the emitting electrode layer; the emitting electrode layer includes a plurality of emitting electrodes spaced apart along a first direction and extending along a second direction, and the plurality of common electrode lines reuse at least a plurality of the emitting electrodes respectively; the sensing electrode layer includes a plurality of sensing electrodes spaced apart along the second direction and extending along the first direction, and the plurality of common electrode feedback lines reuse at least a plurality of the sensing electrodes respectively.

9. The display panel according to claim 8, wherein: Each of the sensing electrodes is multiplexed by the common electrode feedback line.

10. A display device, characterized in that: include: The device comprises a display panel according to any one of claims 1 to 9 and a backlight module arranged opposite to the display panel, wherein the backlight module is used to provide backlight to the display panel.

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