Display panel, driving method thereof, and display device

Abstract

Embodiments of the present application disclose a display panel and a driving method thereof, and a display device. The display panel of an embodiment comprises a display substrate and a touch layer, a first side of a non-display area comprises a fan-out area, a binding area, and a circuit area arranged between the fan-out area and the binding area, the circuit area comprises N simplified circuits, the binding area comprises a plurality of first pads and a plurality of second pads, the simplified circuit comprises a decoder sub-circuit and a selection sub-circuit, a control end of the selection sub-circuit is electrically connected to an output end of the decoder sub-circuit, an input end is electrically connected to one first pad, and an output end is electrically connected to a fan-out line, input ends of the decoder sub-circuit are respectively electrically connected to the second pads, and the simplified circuit is configured to select the fan-out line represented by the input encoding of the decoder sub-circuit based on an output signal of the decoder sub-circuit, so as to send or read a touch signal to or from the fan-out line. The number of touch lines occupying the circuit board is reduced by the simplified circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of touch display. More particularly, it relates to a display panel and a driving method thereof, and a display device. BACKGROUND

[0002] At present, MLOC (Multiple Layer On Cell) technology and FMLOC (Flexible Multiple Layer On Cell) technology realize the integration of display and touch, and make the overall display product lightweight design, which has been widely used in the display industry.

[0003] However, with the increase of product size and the improvement of touch precision requirements, the number of lines required for touch is increasing, and due to the narrow width (for example, about 13 mm) of the printed circuit board (PCB) in the display product and the limited line width and line spacing in the board, the touch-related wiring needs to occupy the 2-layer thickness of the PCB, which is not conducive to the lightweight design of the display product, especially the FMLOC product. SUMMARY

[0004] The purpose of the present application is to provide a display panel which can solve at least one of the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The first aspect of the present application provides a display panel, comprising a display substrate and a touch layer arranged on the display substrate, the display panel comprising a display area and a non-display area surrounding the display area, the touch layer comprising a plurality of first touch signal lines arranged in the non-display area,

[0007] The first side of the non-display area comprises a fan-out area, a binding area, and a circuit area arranged between the fan-out area and the binding area, the circuit area comprising N simplified circuits,

[0008] The fan-out area comprises fan-out lines electrically connected one-to-one to the first touch signal lines, and the binding area comprises at least one first pad and a plurality of second pads,

[0009] The simplified circuit comprises a decoder sub-circuit and a selection sub-circuit, the control end of the selection sub-circuit is electrically connected to the output end of the decoder sub-circuit, the input end is electrically connected to one first pad, and the output end is electrically connected to the fan-out line, and the input end of the decoder sub-circuit is electrically connected to the second pad,

[0010] The simplified circuit is configured to select a fan-out line of the input code representation of the decoder sub-circuit based on an output signal of the decoder sub-circuit, so as to transmit or read the touch signal from the selected fan-out line,

[0011] wherein N is an integer greater than or equal to 1.

[0012] Optionally, the first touch signal line includes a transmission signal line and a reading signal line, the fan-out line includes a first fan-out line corresponding to the transmission signal line and a second fan-out line corresponding to the reading signal line, and the circuit region includes a first simplified circuit and a second simplified circuit,

[0013] The first fan-out line is electrically connected to an output terminal of a selection sub-circuit of the first simplified circuit, and an input terminal of the selection sub-circuit of the first simplified circuit is connected to the touch transmission signal.

[0014] The second fan-out line is electrically connected to an output terminal of a selection sub-circuit of the second simplified circuit, and an input terminal of the selection sub-circuit of the second simplified circuit outputs the touch reception signal.

[0015] Optionally, in each simplified circuit, the selection sub-circuit includes a plurality of first transistors, the number of the plurality of first transistors is the same as the number of the fan-out line connected to the simplified circuit, the control electrodes of the plurality of first transistors are respectively electrically connected to a plurality of output terminals of the decoder sub-circuit, the first electrodes are collectively electrically connected to a first pad, and the second electrodes are respectively electrically connected to the fan-out line.

[0016] Optionally, the decoder sub-circuit is an n-2 n decoder, and n is an integer greater than or equal to 2.

[0017] Optionally, the touch layer includes a plurality of touch electrodes arranged in an array in the display region and a first touch signal line arranged in the non-display region,

[0018] The non-display region further includes a second side, a third side and a fourth side, the second side is opposite to the first side, the third side is opposite to the fourth side,

[0019] The plurality of touch electrodes includes a plurality of electrode rows arranged in a direction from the second side to the first side, and a plurality of electrode columns arranged in a direction from the third side to the fourth side,

[0020] The reading signal line is electrically connected to the electrode column in a one-to-one correspondence, and the transmission signal line is electrically connected to the electrode row in a one-to-one correspondence, or

[0021] The reading signal line is electrically connected to the electrode column in a one-to-one correspondence, and the transmission signal line includes a first transmission signal line electrically connected to the electrode row in a one-to-one correspondence and a second transmission signal line electrically connected to the electrode row in a one-to-one correspondence, and the first touch electrode and the last touch electrode of each electrode row are respectively electrically connected to one first transmission signal line and one second transmission signal line.

[0022] Optionally, the first transistor is an N-type transistor or a P-type transistor.

[0023] A second aspect of the present disclosure provides a display device comprising the display panel as described above.

[0024] Optionally, the display device further comprises a control unit configured to send a touch sending signal to the display panel and receive a touch receiving signal from the display panel at a first frequency, and analyze the touch receiving signal from the display panel at a second frequency,

[0025] The first frequency is at least 2 times the second frequency. n The decoder sub-circuit is n-2 decoders, and n is an integer greater than or equal to 2. n The decoder sub-circuit is n-2 decoders, and n is an integer greater than or equal to 2.

[0026] A third aspect of the present disclosure provides a driving method of the display panel as described above, comprising:

[0027] Outputting control codes to the second pads corresponding to each of the simplified circuits in sequence, and

[0028] Sending or reading touch signals from the fan-out line synchronously with the output of each control code.

[0029] Optionally, the driving method further comprises:

[0030] Analyzing the obtained touch signals to determine a touch position,

[0031] The output frequency of the control codes is a first frequency, and the analysis frequency of the touch signals is a second frequency, the first frequency is at least 2 times the second frequency. n The decoder sub-circuit is n-2 decoders, and n is an integer greater than or equal to 2. n The decoder sub-circuit is n-2 decoders, and n is an integer greater than or equal to 2.

[0032] The beneficial effects of the present disclosure are as follows:

[0033] The present disclosure aims to solve the existing problems, and provides a display panel, a driving method thereof, and a display device. At least one simplified circuit is provided, and the simplified circuit comprises a decoder sub-circuit and a selection sub-circuit. The number of pads required by the first touch signal line is simplified through the cooperation of the decoder sub-circuit and the selection sub-circuit, thereby reducing the number of touch lines occupying the circuit board, which is beneficial to the thinning of the display product and further reduces the product cost, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0034] The specific embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A schematic diagram of a display panel according to an embodiment of the present disclosure is shown.

[0036] Figure 2 FIG. 1 shows a schematic circuit diagram of a simplified circuit in a display panel according to an embodiment of the present disclosure;

[0037] Figure 3 FIG. 2 shows a schematic circuit diagram of another simplified circuit in a display panel according to an embodiment of the present disclosure;

[0038] Figure 4 FIG. 3 shows a schematic diagram of a touch layer in a display panel according to an embodiment of the present disclosure;

[0039] Figure 5 FIG. 4 shows a schematic diagram of another touch layer in a display panel according to an embodiment of the present disclosure;

[0040] Figure 6 FIG. 5 shows a schematic flowchart of a driving method of a display panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the application, the application will be further described below with reference to the embodiments and the accompanying drawings. Like reference numerals in the drawings denote like elements throughout. Those skilled in the art will understand that the specific description given below is illustrative only and not restrictive to the scope of the present application.

[0042] In the present application, “on”, “formed on” and “disposed on” can mean that a layer is directly formed or disposed on another layer, or indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0043] It should be noted that although the terms “first”, “second”, and the like can be used herein to describe various components, members, elements, regions, layers and / or sections, these components, members, elements, regions, layers and / or sections should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer and / or section from another. Thus, for example, a first component, a first member, a first element, a first region, a first layer and / or a first section discussed below can be called a second component, a second member, a second element, a second region, a second layer and / or a second section without departing from the teachings of the present application.

[0044] Based on one of the above problems, an embodiment of the present application provides a display panel, comprising: a display substrate and a touch layer disposed on the display substrate, the display panel comprising a display area and a non-display area surrounding the display area, the touch layer comprising a plurality of first touch signal lines disposed in the non-display area,

[0045] The first side of the non-display region comprises a fan-out region, a binding region, and a circuit region arranged between the fan-out region and the binding region, the circuit region comprising N simplified circuits,

[0046] The fan-out region comprises fan-out lines electrically connected one-to-one with the first touch signal lines, and the binding region comprises at least one first pad and a plurality of second pads,

[0047] The simplified circuit comprises a decoder sub-circuit and a selection sub-circuit, the control end of the selection sub-circuit is electrically connected to the output end of the decoder sub-circuit, the input end is electrically connected to one first pad, and the output end is electrically connected to the fan-out line, and the input end of the decoder sub-circuit is electrically connected to the second pads respectively,

[0048] The simplified circuit is configured to select the fan-out line represented by the input encoding of the decoder sub-circuit based on the output signal of the decoder sub-circuit, to send or read the touch signal to or from the fan-out line,

[0049] Wherein, N is an integer greater than or equal to 1.

[0050] In the embodiment, by providing at least one simplified circuit, and the simplified circuit comprising a decoder sub-circuit and a selection sub-circuit, the number of pads required by the first touch signal line is simplified by the cooperation of the decoder sub-circuit and the selection sub-circuit, thereby reducing the number of touch lines occupying the circuit board, which is conducive to the thinning of the display product. At the same time, when the number of pads used for binding is reduced, the size of the flexible circuit board electrically connecting the display panel and the printed circuit board will also be reduced, thereby reducing the cost of the display product.

[0051] In a specific example, referring to Figure 1 The display panel comprises a display substrate and a touch layer arranged on the display substrate. The display panel comprises a display region AA and a non-display region NA surrounding the display region AA. Figure 1 The at least lower side of the non-display region NA shown in the figure is the display substrate which can be exposed in the top view, and the left and right sides of the non-display region NA and the display region AA can be the touch layer shown in the top view.

[0052] Wherein, the display substrate 200 can be an OLED display substrate, an LCD display substrate, a Mini led display substrate or a Micro led display substrate. Those skilled in the art should understand that when the display substrate is a flexible substrate, the display substrate can be an OLED display substrate, a Mini led display substrate or a Micro led display substrate.

[0053] Figure 1 A simplified view of the touch layer is shown in the figure, wherein the arrangement relationship of the touch electrodes in the touch layer and the relationship between the touch electrodes and the signal lines arranged in the touch layer are shown in the form of grid lines in the display region AA.

[0054] Referring to Figure 1 As shown in FIG. 1, the touch layer includes a plurality of touch electrodes arranged in an array in the display area AA, the plurality of touch electrodes including A electrode rows and B electrode columns, each column corresponding to one read signal line RX, and each row corresponding to one or two transmission signal lines TX. A and B represent positive integers greater than or equal to 2, and A and B can be equal or not equal. In this document, when no distinction is needed, TX represents the transmission signal line, and RX represents the read signal line.

[0055] In order to further understand the structure of the touch electrodes in the touch layer, the relationship between the touch electrodes and the signal lines in the touch layer, and the function of the touch layer, Figure 4 and Figure 5 a specific example of the touch layer is shown.

[0056] Optionally, referring to Figure 4 As shown in FIG. 1, the touch layer includes a plurality of touch electrodes arranged in an array in the display area AA. The plurality of touch electrodes includes A electrode rows arranged along the Y direction and B electrode columns arranged along the X direction.

[0057] In this example, the right side of the figure is the third side, and the left side is the fourth side. Then, the Y direction is the direction from the second side to the first side, and the X direction is the direction from the third side to the fourth side. Of course, the above first, second, third and fourth are intended to distinguish, and are not intended to be limited.

[0058] Continuing to refer to Figure 4 As shown in FIG. 1, in this example, each electrode row includes a plurality of transmission electrodes 101, and the plurality of transmission electrodes 101 in each electrode row are electrically connected together and electrically connected to one transmission signal line TX provided in the non-display area NA, that is, the transmission signal line TX is provided one by one with the electrode row.

[0059] Specifically, the multiple transmitting electrodes 101 in the first electrode row are electrically connected together through the conductive portions arranged in the same layer and are electrically connected from the right end to one transmitting signal line TX1 arranged in the non-display area NA; the multiple transmitting electrodes 101 in the second electrode row are electrically connected together through the conductive portions arranged in the same layer and are electrically connected from the left end to one transmitting signal line TX2 arranged in the non-display area NA; the multiple transmitting electrodes 101 in the third electrode row are electrically connected together through the conductive portions arranged in the same layer and are electrically connected from the right end to one transmitting signal line TX3 arranged in the non-display area NA; and so on, the multiple transmitting electrodes 101 in the A-th electrode row are electrically connected together through the conductive portions arranged in the same layer and are electrically connected from the left end to one transmitting signal line TXA arranged in the non-display area NA. It should be understood that although the transmitting signal line TXA of the A-th electrode row is shown to be led out from the left end, it is not restrictive, and in essence, the specific end from which the signal line of the A-th electrode row is led out depends on the total number of rows, which will not be described herein. Figure 4 The transmitting signal line TXA of the A-th electrode row is shown to be led out from the left end, but it is not restrictive, and in essence, the specific end from which the signal line of the A-th electrode row is led out depends on the total number of rows, which will not be described herein.

[0060] Exemplarily, referring to FIG. 1, each electrode column includes multiple receiving electrodes 102, and the multiple receiving electrodes 102 in each electrode column are electrically connected together and are electrically connected to one reading signal line RX arranged in the non-display area NA, i.e., the reading signal line RX is arranged in one-to-one correspondence with the electrode column. The multiple receiving electrodes 102 in each electrode column are electrically connected together in a bridging manner through the conductive portions arranged in a conductive layer different from the touch electrodes. Figure 4

[0061] It should be understood by those skilled in the art that at least one insulating layer is arranged between the conductive layer in which the touch electrodes are arranged and the conductive layer in which the conductive portions for bridging are arranged. It should be noted that although the electrode rows are shown to be electrically connected in the same layer and the electrode columns are bridged in different layers in this example, the present disclosure is not limited thereto, and the electrode columns can be electrically connected in the same layer and the electrode rows can be bridged in different layers.

[0062] In an embodiment of the present disclosure, a touch transmitting signal is transmitted to each transmitting electrode 101 through each transmitting signal line TX, and a touch receiving signal is read through each reading signal line RX to determine a specific touch position. And Figure 4 An example is a 1TX1RX touch structure.

[0063] It should also be noted that Figure 4 ​The purpose is to exemplify a touch structure that meets 1TX1RX, but it is not intended to be limiting. Other specific touch structures that meet 1TX1RX also fall within the scope of protection of this application. For example, the pattern of the touch electrode is different from the touch layer of this example, the pattern of the conductive part is different from the touch layer of this example, the connection method of each layer is different from the touch layer of this example, etc., which will not be repeated in this article.

[0064] Reference Figure 5 As shown, Figure 5 Another touch layer structure is shown in FIG.

[0065] and Figure 4 The structures shown are similar in that the touch layer includes a plurality of touch electrodes arranged in an array in the display area AA, and the plurality of touch electrodes includes A electrode rows arranged along the Y direction and B electrode columns arranged along the X direction.

[0066] In this example, each electrode row includes multiple transmit electrodes 101, and the multiple transmit electrodes 101 in each electrode row are electrically connected together. Differently, each electrode row has two ends electrically connected to two transmit signal lines TX. That is, the transmit signal lines TX include a first transmit signal line electrically connected to each electrode row in a one-to-one correspondence, and a second transmit signal line electrically connected to each electrode row in a one-to-one correspondence. The first touch electrode and the last touch electrode in each electrode row are electrically connected to a first transmit signal line and a second transmit signal line, respectively.

[0067] Specifically, refer to Figure 5 As shown, the right-end electrode of the electrode column represents the head touch electrode, and the left-end electrode represents the end touch electrode. Then, the right-end touch electrode of the first electrode row is electrically connected to the first transmission signal line TX1-1, and the left-end touch electrode is electrically connected to the second transmission signal line TX1-2; the right-end touch electrode of the second electrode row is electrically connected to the first transmission signal line TX2-1, and the left-end touch electrode is electrically connected to the second transmission signal line TX2-2; the right-end touch electrode of the third electrode row is electrically connected to the first transmission signal line TX3-1, and the left-end touch electrode is electrically connected to the second transmission signal line TX3-2; and so on, the right-end touch electrode of the A-th electrode row is electrically connected to the first transmission signal line TXA-1, and the left-end touch electrode is electrically connected to the second transmission signal line TXA-2. The transmission electrodes of each electrode row can be provided and electrically connected using the same conductive layer.

[0068] Reference Figure 5 As shown, the wiring of each electrode column is similar to Figure 4 In the same example, the receiving electrodes 102 in each electrode column are electrically connected together in a bridging manner through a conductive portion provided in a conductive layer different from that of the touch electrodes.

[0069] In the embodiments of the present disclosure, Figure 5An example is a 2TX1RX touch structure, which also uses each transmission signal line TX to transmit a touch transmission signal to each transmission electrode 101, and determines the specific touch position by reading the touch reception signal of each read signal line RX. Figure 5 A specific touch structure of 1TX1RX is not intended to be limited, and will not be described herein.

[0070] In embodiments of the present disclosure, the touch layer includes a plurality of first touch signal lines, which can be read signal lines RX, transmission signal lines TX, or both read signal lines RX and transmission signal lines TX.

[0071] In particular, referring to Figure 1 As shown, the non-display area NA includes a fan-out area 11, a binding area 12, and N simplified circuits 13 disposed between the fan-out area 11 and the binding area 12. It should be understood that herein, the N simplified circuits are collectively represented by the reference numeral 13. The N simplified circuits 13 include simplified circuits 13-1, 13-1, 13-1, …, 13-N, where N is an integer greater than or equal to 1.

[0072] In embodiments of the present disclosure, the fan-out area 11 includes fan-out lines electrically connected one-to-one with the first touch signal lines. The fan-out lines can be disposed in the display substrate, and the first touch signal lines can be electrically connected one-to-one with the fan-out lines through vias from the touch layer to the display substrate, or the first touch signal lines can be electrically connected with the fan-out lines through the first vias between the touch layer and the intermediate conductive layer between the film layers where the fan-out lines are located, the intermediate conductive layer, and the second vias between the intermediate conductive layer and the film layers where the fan-out lines are located, which will not be described herein.

[0073] The binding area 12 includes at least one first pad 121 and a plurality of second pads 122, and the first pad 121 and the second pad 122 are respectively used to connect different signal ports of the simplified circuit 13.

[0074] Continuing to refer to Figure 2 and Figure 3 As shown, Figure 2 an exemplary structure of a simplified circuit is shown, Figure 3 another exemplary structure of a simplified circuit is shown.

[0075] Referring to Figure 2 As shown, the simplified circuit 13 includes a decoder sub-circuit 131 and a selection sub-circuit 132, the control end of the selection sub-circuit 132 is electrically connected to the output end of the decoder sub-circuit 131, the input end Input-RX is electrically connected to one first pad 121, the output end is electrically connected to the fan-out line, and the input ends S1-S5 of the decoder sub-circuit are respectively electrically connected to five second pads 121.

[0076] In this example, the first pad 121 to which the input terminal Input-RX is electrically connected is a pad for reading a touch signal. The simplified circuit 13 is configured to select a fan-out line of which the input code representation of the decoder sub-circuit 131 based on the output signal of the decoder sub-circuit 131, to read a touch signal from the fan-out line, at this time, the touch signal read is actually a touch receiving signal.

[0077] Exemplarily, continuing to refer to Figure 2 shown in the figure, Figure 2 The decoder sub-circuit 131 shown in the figure is a 5-32 decoder, which is a binary decoder capable of decoding 32 encoded data of decimal numbers 0 to 31. Among them, the input terminals S1-S5 of the decoder sub-circuit receive "1" or "0", and the combination of the input terminals S1-S5 represents the input 5-bit binary code. Among them, the order of the code bits of the decoder sub-circuit can be S1-S5 or from S5-S1, that is, Figure 2 The decoder sub-circuit 131 shown in the figure is connected in sequence with 5 second pads 122 as Figure 1 shown, the code represented by the 5 second pads 122 can be from right to left or from left to right, and the specific input code rule depends on the circuit structure of the decoder sub-circuit. In this example, when the input terminals S1-S5 of the decoder sub-circuit input valid data, the decoder sub-circuit 131 decodes the input data and outputs a valid level signal to the output terminal corresponding to the data represented by the input terminal S1-S5.

[0078] It can be understood that for a 5-32 decoder, the 5-bit code of the input terminals S1-S5 can be decoded into 32 data respectively, so that according to the different code data input by the input terminals S1-S5, one of the 32 output terminals can be uniquely selected to output a valid level signal.

[0079] Optionally, the selection sub-circuit includes a plurality of first transistors, the number of the plurality of first transistors is the same as the number of the fan-out lines connected by the simplified circuit, the control electrodes of the plurality of first transistors are electrically connected to the plurality of output terminals of the decoder sub-circuit respectively, the first electrodes are electrically connected to one of the first pads in common, and the second electrodes are electrically connected to the fan-out lines correspondingly.

[0080] Specific to this example, refer to Figure 2As shown, the selection sub-circuit 132 includes 32 first transistors T1-T32, which are connected in a manner indicating that the simplified circuit 13 is connected to 32 fan-out lines. The control terminals of the 32 first transistors T1-T32 are connected to the 32 output terminals of the 5-32 decoder one by one, and the first poles of the 32 first transistors T1-T32 are electrically connected together as the input terminal Input-RX of the selection sub-circuit 132 and are commonly electrically connected to a first pad 121.

[0081] In Figure 2 In the example shown, through the cooperation of the 32 first transistors T1-T3 in the selection sub-circuit 132 and the input and output decoding rules of the 5-32 decoder of the decoder sub-circuit 131, the 32 fan-out lines RX1-RX32 connected to the simplified circuit 13 can be sequentially selected according to the input encoding data in the order of the input encoding data, so that the first pad 131 connected to the input terminal Input-RX of the selection sub-circuit 132 reads the touch signal in sequence according to the input timing of the encoding signal of the decoding sub-circuit 131.

[0082] For example, if the decoding rule of the decoder sub-circuit 131 is that the low-level signal is output after the encoding signal input to the input terminals S1-S5 is decoded, the first transistor T1 in the selection sub-circuit 132 should be a P-type transistor, so that the first transistor connected to the output terminal represented by the encoding data is turned on, so that the touch signal is read from the corresponding fan-out line. That is, if the input terminals S1-S5 represent the bits from low to high in sequence, and the selected bit outputs a low-level signal after decoding, then if the input terminals S1-S5 input the encoding signals 1, 0, 0, 0, 0 in sequence, it indicates that the encoding data “00001” is input, so that the first transistor T2 is turned on, and the first pad 131 connected to the input terminal Input-RX reads the touch signal from the fan-out line RX2.

[0083] For another example, if the decoding rule of the decoder sub-circuit 131 is that the high-level signal is output after the encoding signal input to the input terminals S1-S5 is decoded, the first transistor in the selection sub-circuit 132 should be an N-type transistor, so that the first transistor connected to the output terminal represented by the encoding data is turned on, so that the touch signal is read from the corresponding fan-out line.

[0084] Therefore, one Figure 2 The simplified circuit 13 shown can simplify the 32 fan-out lines RX1-RX32 into 6 pads in the binding area, thereby greatly simplifying the number of touch-related signal lines in the printed circuit board corresponding to the display panel, thereby facilitating the light and thin display product.

[0085] It should be noted that although Figure 2Each output of the decoder sub-circuit 131 constituted by the 5-32 decoder is electrically connected to one of the 32 first transistors T1-T32, so that the simplified circuit 13 simply 32 fan-out lines RX1-RX32 to 6 signal ports of the pads. However, the simplified circuit 13 in the embodiment of the present disclosure is not limited to the one-to-one connection.

[0086] That is, when the decoder sub-circuit 131 is a 5-32 decoder, it is not necessary to electrically connect all the 32 outputs of the decoder sub-circuit 131 to the 32 first transistors one by one, and then to select the 32 fan-out lines. In the embodiment of the present disclosure, the unused output of the decoder sub-circuit can be left empty according to actual needs. That is, the number of the outputs of the selection sub-circuit 132 in a simplified circuit 13 depends on the number of the fan-out lines to be connected by the simplified circuit 13, that is, the number of the first transistors included in the selection sub-circuit 132 depends on the number of the fan-out lines to be selected.

[0087] Figure 3 Another structure example of the simplified circuit is shown. From Figure 3 It can be seen that the simplified circuit includes a decoder sub-circuit 131' and a selection sub-circuit 132', wherein the decoder sub-circuit 131' is a 5-32 decoder, and the selection sub-circuit 132' includes 32 first transistors T1-T32.

[0088] The structure of the simplified circuit in this example is different from that of the simplified circuit shown in Figure 2 only in that the input of the selection sub-circuit 132' is Input-TX, and when the input end Input-TX is electrically connected to a first pad 121, it means that when the first transistor turned on by the decoding of the encoded signal input into the decoder sub-circuit 131' is turned on, the touch signal is sent from the input end Input-TX to the fan-out line, and the touch signal is a touch sending signal. Other structural characteristics and functions of this example are the same as those of the example shown in Figure 2 .

[0089] When the simplified circuit 13 shown in Figure 3 is included in the display panel, each simplified circuit 13 can simply 32-bit fan-out lines to the pads of the 6 bonding areas, so as to greatly simplify the number of touch-related signal lines in the printed circuit board corresponding to the display panel, thereby facilitating the light and thin display product.

[0090] It should be noted that although the decoder sub-circuit 131 in the simplified circuit 13 shown in Figure 2 and Figure 3 is a 5-32 decoder, the present disclosure is not limited thereto.

[0091] Alternatively, in addition to Figure 2 and3 In addition to the decoder structure shown, the decoder sub-circuit can also be other binary decoders, i.e., the decoder sub-circuit can be an n-2 n The decoder, an integer n greater than or equal to 2, wherein the number of n can be set as needed.

[0092] Alternatively, in addition to the binary decoder, the decoder sub-circuit can also be a decoder using hexadecimal decoding or other decoding rules, such as a BCD decoder, etc.

[0093] It should be noted that the present disclosure does not intend to limit each of the N simplified circuits 13 in the display panel to be the same structure. Or in other words, the decoder sub-circuit in the N simplified circuits is not the same decoder.

[0094] Specifically, the decoder sub-circuit in a part of the N simplified circuits 13 in the display panel is a 5-32 decoder, the decoder sub-circuit in a part of the simplified circuits is a 4-16 decoder or a 3-8 decoder.

[0095] Because the decoder is composed of one or more gate circuits of AND gate, OR gate and NOT gate composed of switching tubes, the more inputs the decoder has, the more devices the decoder has. When set in this way, it can avoid the waste of the structure in the decoder sub-circuit when the number of fan-out lines to be selected is less than the total number of output terminals of the decoder sub-circuit, thereby reducing the space occupied by the simplified circuit.

[0096] In an optional embodiment, based on Figure 4 and Figure 5 The touch control layer structure shown, the first touch control signal line includes a transmission signal line TX and a reading signal line RX, the fan-out line includes a first fan-out line corresponding to the transmission signal line TX and a second fan-out line corresponding to the reading signal line RX, and the circuit area 13 includes a first simplified circuit and a second simplified circuit.

[0097] Specifically, the first fan-out line is electrically connected to the output terminal of the selection sub-circuit of the first simplified circuit, the input terminal of the selection sub-circuit of the first simplified circuit is connected to the touch control transmission signal, and the second fan-out line is electrically connected to the output terminal of the selection sub-circuit of the second simplified circuit, and the input terminal of the selection sub-circuit of the second simplified circuit outputs the touch control receiving signal.

[0098] Optionally, the one-to-one correspondence applies to Figure 4 and Figure 5The two touch control layer structures of the illustrated example. That is, the first touch control signal line includes both the read signal line RX and the transmission signal line TX, the read signal line RX is electrically connected with the electrode column one by one, and the transmission signal line TX1, TX2, TX3, …, TXA is electrically connected with the electrode row one by one; or, the first touch control signal line includes both the read signal line RX and the transmission signal line TX, the read signal line RX is electrically connected with the electrode column one by one, and the transmission signal line TX includes the first transmission signal line TX1-1, TX2-1, TX3-1, …, TXA-1 electrically connected with the electrode row one by one and the second transmission signal line TX1-2, TX2-2, TX3-2, …, TXA-2 electrically connected with the electrode row one by one, and the first touch electrode and the last touch electrode of each electrode row are electrically connected with one first transmission signal line TX1-1, TX2-1, TX3-1, …, TXA-1 and one second transmission signal line TX1-2, TX2-2, TX3-2, …, TXA-2 respectively.

[0099] Through the setting, the fan-out line connected with each read signal line RX and the fan-out line connected with each transmission signal line TX are both connected to the output end of the selection sub-circuit, so that all the read signal lines RX and the transmission signal lines TX can be bound by the N simplified circuits to simplify the number of binding pads, so that the maximum simplification ratio can be realized, and the thinness level of the display product is significantly improved. At the same time, after reducing the number of touch-related binding pads, not only the wiring layer number and the thickness of the printed circuit board are reduced, but also the size of the flexible circuit board electrically connected with the display panel can be correspondingly reduced, so that the product cost can be greatly reduced.

[0100] Taking the decoder sub-circuit composed of the 5-32 decoder as an example, if the first fan-out line and the second fan-out line in the display panel are both simplified by the simplified circuit including the decoder sub-circuit composed of the 5-32 decoder, the number of pads is simplified by 32 to 6, and the overall occupied space is reduced by 81%, which greatly saves the space of the printed circuit board and the cost of the printed circuit board and / or the flexible circuit board.

[0101] Based on the same inventive concept, referring to Figure 6 The embodiment of the present disclosure also provides a driving method of the display panel of the above embodiment, which comprises:

[0102] S1, sequentially outputting control codes to the second pads corresponding to each simplified circuit, and

[0103] S2, transmitting or reading touch signals from the fan-out line synchronously with the output of each control code.

[0104] Through the arrangement, the action of outputting the control code to the corresponding second pad in the simplified circuit and sending or reading the touch signal from the corresponding fan-out signal line are synchronized, so that the sending or reading action of the touch signal is matched with the conduction of the fan-out line corresponding to the first touch signal line in the touch layer to the corresponding first pad, so that the sent or acquired touch signal can be accurately corresponded to the position of the expected selected first touch signal, to ensure accurate acquisition of the touch position.

[0105] In addition, because the simplification of the number of pads for touch in the display panel is achieved by changing the parallel sending and reading of the touch signal to serial sending and reading, in order to ensure that the touch information to be acquired in the display panel is acquired completely before a touch analysis is performed, optionally, the driving method further comprises: analyzing the acquired touch signal to determine the touch position, the output frequency of the control code is a first frequency, the frequency of analyzing the touch signal is a second frequency, the first frequency is at least 2 n times the second frequency, and the decoder sub-circuit is an n-2 n decoder, n is an integer greater than or equal to 2.

[0106] It should be noted that if the decoders in the decoder sub-circuit are multiple decoders, the ratio of the first frequency to the second frequency should be greater than the ratio of the decoder with the largest ratio.

[0107] Based on the same inventive concept, embodiments of the present application also provide a display device comprising the display panel described in the above embodiments.

[0108] Since the display panel included in the display device provided by the embodiments of the present application corresponds to the display panel provided by the above several embodiments, the previous embodiments are also applicable to the present embodiment, and will not be described in detail in the present embodiment.

[0109] In the present embodiment, the display device can be any product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a vehicle-mounted display, a digital photo frame or a navigator. In particular, a touch display panel with a large size.

[0110] Optionally, the display device further comprises a control unit,

[0111] The control unit is configured to send a touch sending signal to the display panel and receive a touch receiving signal from the display panel at a first frequency, and analyze the touch receiving signal from the display panel at a second frequency,

[0112] The first frequency is at least 2 n times the second frequency, and the decoder sub-circuit is an n-2 n decoder, n is an integer greater than or equal to 2.

[0113] Through the setting, it can be ensured that all touch signals needed to be acquired are completed touch sensing before touch information analysis is performed in one touch detection process, thereby ensuring the accuracy of touch analysis while simplifying the number of touch-related pads.

[0114] The present application aims at the current existing problems, and formulates a display panel and a driving method thereof, and a display device, and will be provided with at least one simplified circuit, and the simplified circuit comprises a decoder sub-circuit and a selection sub-circuit, the number of pads required by the first touch signal line is simplified through the cooperation of the decoder sub-circuit and the selection sub-circuit, thereby reducing the number of touch wires occupying the circuit board, which is beneficial to the light and thin display product, and has a wide application prospect.

[0115] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation manners of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description, and it is impossible to enumerate all the implementation manners here. Any changes or variations derived from the technical solutions of the present application still fall within the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: a display substrate and a touch layer disposed on the display substrate, wherein the display panel includes a display area and a non-display area surrounding the display area, and the touch layer includes a plurality of first touch signal lines disposed in the non-display area. The first side of the non-display area includes a fan-out area, a binding area, and a circuit area disposed between the fan-out area and the binding area, wherein the circuit area includes N simplified circuits. The fan-out area includes fan-out lines electrically connected to the first touch signal lines in a one-to-one correspondence, and the binding area includes at least one first pad and a plurality of second pads. The simplified circuit includes: a decoder subcircuit and a selection subcircuit, wherein the control end of the selection subcircuit is electrically connected to the output end of the decoder subcircuit, the input end is electrically connected to a first pad, the output end is electrically connected to the fan-out line, and the input ends of the decoder subcircuit are respectively electrically connected to the second pads. The simplified circuit is configured to select a fan-out line represented by an input code of the decoder sub-circuit based on an output signal of the decoder sub-circuit, so as to send a touch send signal to the selected fan-out line or read a touch receive signal from the fan-out line. The frequency of sending the touch sending signal and reading the touch receiving signal is a first frequency, so that the touch receiving signal can be analyzed at a second frequency, and the first frequency is at least times, the decoder sub-circuit is n- Decoder, Wherein, N is an integer greater than or equal to 1, and n is an integer greater than or equal to 2.

2. The display panel according to claim 1, wherein: The first touch signal line includes a sending signal line and a reading signal line, the fan-out line includes a first fan-out line corresponding to the sending signal line and a second fan-out line corresponding to the reading signal line, and the circuit area includes a first simplified circuit and a second simplified circuit. The first fan-out line is electrically connected to the output end of the selection sub-circuit of the first simplified circuit, and the input end of the selection sub-circuit of the first simplified circuit is connected to the touch sending signal, and The second fan-out line is electrically connected to an output end of a selection sub-circuit of the second simplified circuit, and an input end of the selection sub-circuit of the second simplified circuit outputs the touch reception signal.

3. The display panel according to claim 1, wherein: In each of the simplified circuits, the selection sub-circuit includes a plurality of first transistors, the number of the plurality of first transistors being the same as the number of fan-out lines connected to the simplified circuit, the control electrodes of the plurality of first transistors being respectively electrically connected to a plurality of output terminals of the decoder sub-circuit, the first electrodes being commonly electrically connected to one of the first pads, and the second electrodes being correspondingly electrically connected to the fan-out lines.

4. The display panel according to claim 2, wherein: The touch layer includes a plurality of touch electrodes arranged in an array in the display area and the first touch signal lines arranged in the non-display area. The non-display area further includes a second side, a third side, and a fourth side, wherein the second side is opposite to the first side, and the third side is opposite to the fourth side. The plurality of touch electrodes include a plurality of electrode rows arranged in a direction from the second side to the first side, and a plurality of electrode columns arranged in a direction from the third side to the fourth side. The read signal lines are electrically connected to the electrode columns in a one-to-one correspondence, and the transmit signal lines are electrically connected to the electrode rows in a one-to-one correspondence, or The reading signal lines are electrically connected to the electrode columns in a one-to-one correspondence, and the sending signal lines include first sending signal lines electrically connected to the electrode rows in a one-to-one correspondence and second sending signal lines electrically connected to the electrode rows in a one-to-one correspondence, and the first touch electrode and the last touch electrode of each electrode row are electrically connected to one of the first sending signal lines and one of the second sending signal lines, respectively.

5. The display panel according to claim 3, wherein: The first transistor is an N-type transistor or a P-type transistor.

6. A display device, characterized in that: include: The display panel according to any one of claims 1 to 5; as well as control unit, The control unit is configured to send a touch transmission signal and receive a touch reception signal to the display panel at a first frequency, and analyze the touch reception signal from the display panel at a second frequency, The first frequency is at least times, the decoder sub-circuit is n- Decoder, n is an integer greater than or equal to 2.

7. A method for driving a display panel according to any one of claims 1 to 5, characterized in that: include: outputting control codes to the second pads corresponding to each of the simplified circuits in sequence; Sending a touch sending signal to the fan-out line or reading a touch receiving signal from the fan-out line in synchronization with the output of each of the control codes; as well as Analyze the acquired touch reception signal to determine the touch position, The output frequency of the control code is a first frequency, the frequency of the touch reception signal is analyzed as a second frequency, and the first frequency is at least times, the decoder sub-circuit is n- Decoder, n is an integer greater than or equal to 2.

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