Display panel, driving method thereof and display device

Abstract

The embodiment of the invention discloses a display panel, a driving method thereof and a display device. The display panel of one embodiment comprises a display substrate and a touch control 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 bonding pads and a plurality of second bonding pads, each simplified circuit comprises a decoder sub-circuit and a selection sub-circuit, and the decoder sub-circuit comprises N first bonding pads and N second bonding pads. The control end of the selection sub-circuit is electrically connected to the output end of the decoder sub-circuit, the input end of the selection sub-circuit is electrically connected to one first bonding pad, the output end of the selection sub-circuit is electrically connected to the fan-out line, and the input end of the decoder sub-circuit is electrically connected to the second bonding pad. And selecting a fan-out line represented by the input code of the decoder sub-circuit so as to send a touch signal to the fan-out line or read the touch signal from the fan-out line. According to the embodiment, the number of touch wires occupying a circuit board is reduced by simplifying the circuit.

Description

Technical Field

[0001] The present invention relates to the field of touch display, and more specifically, to a display panel and a driving method thereof, and a display device. Background Art

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

[0003] However, as product size increases and requirements for touch accuracy increase, more and more circuits are needed for touch. Since the width of the printed circuit board (PCB) in display products is narrow (for example, about 13 mm) and the line width and spacing of the wiring in the board are limited, the touch-related wiring needs to occupy 2 layers of the PCB, which is not conducive to the display products, especially the lightweight and thin FMLOC products. Summary of the invention

[0004] The object of the present invention is to provide a method for solving at least one of the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A first aspect of the present invention 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 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.

[0008] 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.

[0009] 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 end of the decoder subcircuit is electrically connected to the second pad.

[0010] The simplified circuit configuration is 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 signal to the selected fan-out line or read a touch signal from the fan-out line,

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

[0012] Optionally, 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 one-to-one and a second fan-out line corresponding to the reading signal line one-to-one, and the circuit area includes a first simplified circuit and a second simplified circuit.

[0013] The first fan-out line is electrically connected to the output end of the selection sub-circuit of the first simplified circuit, the input end of the selection sub-circuit of the first simplified circuit is connected to the touch sending signal, and

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

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

[0016] Optionally, the decoder subcircuit is n-2 n Decoder, 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 area and a first touch signal line arranged in the non-display area.

[0018] The non-display area 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 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.

[0020] The read signal lines are electrically connected to the electrode columns in a one-to-one correspondence, and the send signal lines are electrically connected to the electrode rows in a one-to-one correspondence, or

[0021] The read 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. The first touch electrode and the last touch electrode of each electrode row are electrically connected to a first sending signal line and a second sending signal line, respectively.

[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 described above.

[0024] Optionally, the display device further includes a control unit, the control unit being configured to send a touch transmission signal to the display panel and receive a touch reception signal at a first frequency, and to analyze the touch reception signal from the display panel at a second frequency.

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

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

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

[0028] A touch signal is sent to or read from the fan-out line in synchronization with the output of each control code.

[0029] Optionally, the driving method further includes:

[0030] Analyze the acquired touch signal to determine the touch position,

[0031] The output frequency of the control code is the first frequency, the frequency of the touch signal end is the second frequency, and the first frequency is at least twice the second frequency. n times, the decoder subcircuit is n-2 n Decoder, n is an integer greater than or equal to 2.

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

[0033] In view of the existing problems, the present invention develops a display panel and a driving method thereof, as well as a display device, and provides at least one simplified circuit, and the simplified circuit includes a decoder subcircuit and a selection subcircuit. The decoder subcircuit and the selection subcircuit cooperate to simplify the number of pads required for the first touch signal line, thereby reducing the number of touch traces occupied on the circuit board, which is conducive to the thinning of display products and further reduces product costs, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0035] Figure 1 A schematic diagram showing a display panel according to an embodiment of the present disclosure;

[0036] Figure 2 A schematic circuit diagram showing a simplified circuit in a display panel according to an embodiment of the present disclosure;

[0037] Figure 3 A schematic circuit diagram showing another simplified circuit in a display panel according to an embodiment of the present disclosure;

[0038] Figure 4 A schematic diagram showing a touch layer in a display panel according to an embodiment of the present disclosure;

[0039] Figure 5 A schematic diagram showing another touch layer in a display panel according to an embodiment of the present disclosure;

[0040] Figure 6 A schematic flow chart of a method for driving a display panel according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0041] In order to explain the present invention more clearly, the present invention is further described below in conjunction with embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and the protection scope of the present invention should not be limited thereto.

[0042] The terms “on”, “formed on” and “disposed on” in the present invention may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is 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", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present invention.

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

[0045] 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.

[0046] The fan-out area includes fan-out lines electrically connected to the first touch signal lines in a one-to-one correspondence, the binding area includes at least one first pad and a plurality of second pads,

[0047] 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 end of the decoder subcircuit is electrically connected to the second pad.

[0048] The simplified circuit configuration is 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 to send a touch signal to or read a touch signal from the fan-out line,

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

[0050] In this embodiment, at least one simplified circuit is provided, and the simplified circuit includes a decoder subcircuit and a selection subcircuit. The number of pads required for the first touch signal line is simplified through the cooperation of the decoder subcircuit and the selection subcircuit, thereby reducing the number of touch lines occupied by the circuit board, which is conducive to the thinness 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 that electrically connects the display panel to the printed circuit board will also be reduced accordingly, thereby reducing the cost of the display product.

[0051] In a specific example, refer to Figure 1 As shown, the display panel includes a display substrate and a touch layer disposed on the display substrate. The display panel includes a display area AA and a non-display area NA surrounding the display area AA. Figure 1 At least the lower side of the non-display area NA shown in the figure is a display substrate that can be exposed in the top view, and the left and right sides of the non-display area NA and the display area AA may be a touch layer shown in the top view.

[0052] The display substrate 200 may 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 may 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, 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 simplified in the display area AA in the form of grid lines.

[0054] Reference Figure 1 As shown, the touch layer includes a plurality of touch electrodes arranged in an array in the display area AA, and these touch electrodes include A electrode rows and B electrode columns, each column leads to a corresponding read signal line RX, and each row leads to 1 or 2 transmit signal lines TX. Wherein A and B represent positive integers greater than or equal to 2, and A and B may be equal or unequal. Wherein, in this article, when no distinction is required, "TX" represents the transmit 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, refer to Figure 4 As shown, the touch layer includes a plurality of touch electrodes arranged in an array in the display area AA. The plurality of touch electrodes include A electrode rows arranged along the Y direction and B electrode columns arranged along the X direction.

[0057] Among them, the side where the fan-out area 11, the binding area 12 and the simplified circuit 13 are set in the non-display area NA represents the first side, the side opposite to the first side represents the second side, and the other two opposite sides represent the third side and the fourth side respectively. Specifically in this example, the right side in 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 first, second, third and fourth above are intended to distinguish, but not to limit.

[0058] Continue to refer to Figure 4 As shown, in this example, each electrode row includes multiple transmitting electrodes 101, and the multiple transmitting electrodes 101 in each electrode row are electrically connected together and electrically connected to a transmitting signal line TX set in the non-display area NA, that is, the transmitting signal line TX is set one by one with the electrode row.

[0059] Specifically, the first electrode row in the figure includes a plurality of transmitting electrodes 101 electrically connected together through a conductive portion arranged in the same layer, and electrically connected from the right end to a transmitting signal line TX1 arranged in the non-display area NA; the second electrode row includes a plurality of transmitting electrodes 101 electrically connected together through a conductive portion arranged in the same layer, and electrically connected from the left end to a transmitting signal line TX2 arranged in the non-display area NA; the third electrode row in the figure includes a plurality of transmitting electrodes 101 electrically connected together through a conductive portion arranged in the same layer, and electrically connected from the right end to a transmitting signal line TX3 arranged in the non-display area NA; and so on, the Ath electrode row includes a plurality of transmitting electrodes 101 electrically connected together through a conductive portion arranged in the same layer, and electrically connected from the left end to a transmitting signal line TX A arranged in the non-display area NA. It should be understood that although Figure 4 It is shown that the sending signal line TX A of the Ath electrode row is led out from the left end, but this is not restrictive. In fact, in this alternating wiring method, the specific end from which the signal line of the Ath electrode row is led out depends on the total number of rows, which will not be elaborated in this article.

[0060] For example, refer to Figure 4 As shown, each electrode column includes a plurality of receiving electrodes 102, and the plurality of receiving electrodes 102 in each electrode column are electrically connected together and electrically connected to a read signal line RX disposed in the non-display area NA, that is, the read signal line RX is disposed in a one-to-one correspondence with the electrode column. The receiving electrodes 102 in each electrode column are electrically connected together in a bridge manner through a conductive portion disposed in a conductive layer different from the touch electrode.

[0061] Those skilled in the art can understand that at least one insulating layer is provided between the conductive layer where the touch electrodes are located and the conductive layer where the conductive part for bridging is located. It should be noted that although the example shows that the electrode rows are electrically connected in the same layer and the electrode columns are bridged in different layers, the present disclosure is not limited thereto, and the electrode columns may also be electrically connected in the same layer and the electrode rows may be bridged in different layers.

[0062] In the embodiment of the present disclosure, each transmission signal line TX is used to send a touch transmission signal to each transmission electrode 101, and the touch reception signal of each reading signal line RX is read to determine the specific touch position. Figure 4 An example is a touch control structure of 1TX1RX.

[0063] It should also be noted that Figure 4The purpose is to exemplify a touch structure that satisfies 1TX1RX, but it is not intended to be limiting. Other specific touch structures that satisfy 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 herein.

[0064] Reference Figure 5 As shown, Figure 5 Another structure of the touch layer 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. The plurality of touch electrodes include 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 a plurality of transmitting electrodes 101, and the plurality of transmitting electrodes 101 in each electrode row are electrically connected together. Differently, both ends of each electrode row are electrically connected to two transmitting signal lines TX. That is, the transmitting signal lines TX include a first transmitting signal line electrically connected to the electrode row in a one-to-one correspondence and a second transmitting 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 electrically connected to a first transmitting signal line and a second transmitting 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 Ath electrode row is electrically connected to the first transmission signal line TX A-1, and the left end touch electrode is electrically connected to the second transmission signal line TX A-2. The transmission electrodes of each electrode row can be arranged 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, each receiving electrode 102 in each electrode column is electrically connected together in a bridging manner through a conductive portion arranged in a conductive layer different from the touch electrodes.

[0069] In the embodiments of the present disclosure, Figure 5The example is a 2TX1RX touch structure, which also uses each transmission signal line TX to send a touch transmission signal to each transmission electrode 101, and reads the touch reception signal of each reading signal line RX to determine the specific touch position. Figure 5 The specific touch structure of 1TX1RX is not intended to be limited and will not be described in detail here.

[0070] In an embodiment of the present disclosure, the touch layer includes a plurality of first touch signal lines, which may be readout signal lines RX, transmission signal lines TX, or both readout signal lines RX and transmission signal lines TX.

[0071] In particular, refer 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 represented as a whole by 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 an embodiment of the present disclosure, the fan-out area 11 includes a fan-out line electrically connected to the first touch signal line in a one-to-one correspondence. The fan-out line can be arranged in the display substrate, and the first touch signal line can be electrically connected to the fan-out line in a one-to-one correspondence through a via that passes from the touch layer to the display substrate, or the first touch signal line can be electrically connected to the intermediate conductive part through a first via between the touch layer and the film layer where the fan-out line is located, and then electrically connected to the fan-out line through a second via between the intermediate conductive part and the film layer where the fan-out line is located, which will not be described in detail herein.

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

[0074] Continue to refer to Figure 2 and Figure 3 As shown, Figure 2 An optional structure of a simplified circuit is shown as an example. Figure 3 Another optional structure of a simplified circuit is shown as an example.

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

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

[0077] For example, continue to refer to Figure 2 As shown, Figure 2 The decoder subcircuit 131 shown in FIG. 1 is a 5-32 decoder, which is a binary decoder capable of decoding 32 coded data of decimal numbers 0 to 31. The input terminals S1-S5 of the decoder subcircuit receive "1" or "0", and the combination of the input terminals S1-S5 represents the input 5-bit binary code. The coding bit sequence of the decoder subcircuit can be either S1-S5 or S5-S1, that is, Figure 2 The decoder subcircuit 131 shown is connected to 5 Figure 1 When the five second pads 122 are connected in sequence, the codes represented by the five second pads 122 can be from right to left or from left to right. The specific input coding rule depends on the circuit structure of the decoder subcircuit. In this example, when valid data is input to the input terminals S1-S5 of the decoder subcircuit, the decoder subcircuit 131 decodes the input data and outputs a valid level signal to the output terminal corresponding to the data represented by the input terminals 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 coded 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 subcircuit includes multiple first transistors, the number of the multiple first transistors is the same as the number of fan-out lines connected to the simplified circuit, the control electrodes of the multiple first transistors are respectively electrically connected to multiple output terminals of the decoder subcircuit, the first electrodes are commonly electrically connected to one of the first pads, and the second electrodes are correspondingly electrically connected to the fan-out lines.

[0080] For this example, refer to Figure 2As shown, the selection subcircuit 132 includes 32 first transistors T1-T32. This connection mode indicates that the simplified circuit 13 is connected to 32 fan-out lines. The control terminals of the 32 first transistors T1-T32 are electrically connected to the 32 output terminals of the 5-32 decoder one by one. The first electrodes of the 32 first transistors T1-T32 are electrically connected together as the input terminal Input-RX of the selection subcircuit 132, and are electrically connected to a first pad 121.

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

[0082] For example, if the decoding rule of the decoder subcircuit 131 is that the corresponding bit outputs a low-level signal after decoding the coded signal input from the input terminals S1-S5, the first transistor T1 in the selection subcircuit 132 should be a P-type transistor, so that the first transistor connected to the output terminal represented by the coded data is turned on, thereby reading the touch signal from the corresponding fan-out line. That is, if the input terminals S1-S5 represent bits from low to high in sequence, and the selected bit outputs a low-level signal after decoding, then if the input terminals S1 to S5, according to the input coded signal 1, 0, 0, 0, 0, it means that the coded data is input "00001", so that the first transistor T2 is turned on, and the first pad 131 electrically 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 after decoding the encoded signal input to the input terminals S1-S5, the corresponding bit outputs a high-level signal, 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 encoded data is turned on, thereby reading the touch signal from the corresponding fan-out line.

[0084] It can be seen that a Figure 2 The simplified circuit 13 shown can simplify 32 fan-out lines RX1-RX32 into pads of 6 binding areas, thereby greatly simplifying the number of touch-related signal lines in the printed circuit board corresponding to the display panel, thereby facilitating the thinness of the display product.

[0085] It should be noted that although Figure 2It is shown that each output terminal in the decoder sub-circuit 131 composed of a 5-32 decoder is electrically connected to 32 first transistors T1-T32 in a one-to-one correspondence, so that the simplified circuit 13 just simplifies the 32 fan-out lines RX1-RX32 into signal ports to 6 pads, but the simplified circuit 13 in the embodiment of the present disclosure is not limited to this one-to-one corresponding connection method.

[0086] That is to say, if the decoder subcircuit 131 is a 5-32 decoder, it is not necessary to use its 32 output terminals to be electrically connected to the 32 first transistors in a one-to-one correspondence, and then used to select 32 fan-out lines. In the embodiment of the present disclosure, the output terminals of the decoder subcircuit that are not used can be selected to be vacant according to actual needs. In other words, the number of output terminals of the selection subcircuit 132 in a simplified circuit 13 depends on the number of fan-out lines that the simplified circuit 13 needs to be connected, that is, the number of first transistors included in the selection subcircuit 132 depends on the number of fan-out lines to be selected.

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

[0088] The structure of the simplified circuit in this example is Figure 2 The difference of the simplified circuit shown is that the input terminal of the selection subcircuit 132' is Input-TX. When the input terminal Input-TX is electrically connected to a first pad 121, it means that when the first transistor turned on after the decoded encoded signal input by the decoder subcircuit 131' is turned on, a touch signal is sent from the input terminal Input-TX to the fan-out line, and the touch signal is a touch sending signal. Figure 2 The same structural features and functions as those in the illustrated examples are not described in detail here.

[0089] The display panel includes Figure 3 As shown in the simplified circuit 13, each simplified circuit 13 can simplify the 32-bit fan-out lines into pads of 6 binding areas, thereby greatly simplifying the number of touch-related signal lines in the printed circuit board corresponding to the display panel, thereby facilitating the thinness of the display product.

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

[0091] Optionally, except Figure 2 and3 In addition to the decoder structure shown in the figure, the decoder subcircuit can also be other binary decoders, that is, the decoder subcircuit can be n-2 n Decoder, n is an integer 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 subcircuit may also be a decoder using hexadecimal decoding or other decoding rules, such as a BCD decoder.

[0093] It should be noted that the present disclosure is not intended to limit the structure of each of the N simplified circuits 13 in the display panel to be the same. In other words, the decoder subcircuits in the N simplified circuits are not all the same decoders.

[0094] Specifically, the decoder sub-circuits in some of the N simplified circuits 13 in the display panel are 5-32 decoders, and the decoder sub-circuits in some of the simplified circuits are 4-16 decoders or 3-8 decoders.

[0095] Because the decoder is composed of one or more gate circuits of AND gates, OR gates and NOT gates composed of switch tubes, the more input terminals the decoder has, the more components it has. When this method is used, it can avoid the waste of the structure in the decoder subcircuit when the number of fan-out lines to be selected is less than the total number of output terminals of the decoder subcircuit, thereby reducing the space occupied by the simplified circuit.

[0096] In an optional embodiment, based on Figure 4 and Figure 5 In the touch layer structure shown, the first touch signal line includes a sending signal line TX and a reading signal line RX, the fan-out line includes a first fan-out line corresponding to the sending 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 end of the selection subcircuit of the first simplified circuit, the input end of the selection subcircuit of the first simplified circuit is connected to the touch sending signal, and the second fan-out line is electrically connected to the output end of the selection subcircuit of the second simplified circuit, and the input end of the selection subcircuit of the second simplified circuit outputs the touch receiving signal.

[0098] Optionally, the one-to-one correspondence applies to Figure 4 and Figure 5Two touch layer structures of the example shown. That is, the first touch signal line includes both a read signal line RX and a transmit signal line TX, the read signal line RX is electrically connected to the electrode column in one-to-one correspondence, and the transmit signal lines TX1, TX2, TX3, ..., TXA are electrically connected to the electrode row in one-to-one correspondence; or, the first touch signal line includes both a read signal line RX and a transmit signal line TX, the read signal line RX is electrically connected to the electrode column in one-to-one correspondence, and the transmit signal line TX includes a first transmit signal line TX1-1, TX2-1, TX3-1, ..., TXA-1 electrically connected to the electrode row in one-to-one correspondence and a second transmit signal line TX1-2, TX2-2, TX3-2, ..., TXA-2 electrically connected to the electrode row in one-to-one correspondence, and the first touch electrode and the last touch electrode of each electrode row are electrically connected to a first transmit signal line TX1-1, TX2-1, TX3-1, ..., TXA-1 and a second transmit signal line TX1-2, TX2-2, TX3-2, ..., TXA-2, respectively.

[0099] Through this setting, the fan-out line connected to each read signal line RX and the fan-out line connected to each transmit signal line TX can be connected to the output end of the selection subcircuit, so that the number of binding pads for all read signal lines RX and transmit signal lines TX can be simplified by using N simplified circuits, thereby maximizing the simplification ratio and significantly improving the thinness of display products. At the same time, when the number of touch-related binding pads is reduced, not only the number of wiring layers and thickness of the printed circuit board are reduced, but also the size of the flexible circuit board that electrically connects the display panel to the printed circuit board can be reduced accordingly, thereby greatly reducing product costs.

[0100] Taking the decoder sub-circuit composed of a 5-32 decoder as an example, if the first fan-out line and the second fan-out line in the display panel are simplified using a simplified circuit including the decoder sub-circuit composed of a 5-32 decoder, it is equivalent to simplifying the number of pads by a reduction of 32 to 6, which will reduce the overall occupied space by 81%, greatly saving the space of the printed circuit board, as well as the cost of the printed circuit board and / or flexible circuit board.

[0101] Based on the same inventive concept, Figure 6 As shown, an embodiment of the present disclosure further provides a method for driving the display panel of the above embodiment, comprising:

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

[0103] S2. Sending a touch signal to a fan-out line or reading a touch signal from a fan-out line synchronously with the output of each control code.

[0104] Through this setting, the control code output to the corresponding second pad in the simplified circuit and the action of sending or reading the touch signal from the corresponding fan-out signal line are performed synchronously, so that the conduction of the fan-out line corresponding to the first touch signal line in the touch layer to the corresponding first pad can be coordinated with the sending and reading of the touch signal, so that the sent or obtained touch signal can be accurately corresponded to the position of the expected selected first touch signal, so as to ensure accurate acquisition of the touch position.

[0105] In addition, because the number of pads for touch control in the display panel is simplified by changing the parallel transmission and reading of touch signals to serial transmission and reading, in order to ensure that the touch analysis can be performed only after the touch information to be obtained in the display panel is completely obtained, the driving method optionally further includes: analyzing the obtained touch signal to determine the touch position, the output frequency of the control code is the first frequency, the touch signal end frequency is analyzed as the second frequency, and the first frequency is at least twice the second frequency. n times, the decoder subcircuit is n-2 n Decoder, n is an integer greater than or equal to 2.

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

[0107] Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the display panel described in the above embodiment.

[0108] Since the display panel included in the display device provided in the embodiment of the present application corresponds to the display panels provided in the above-mentioned embodiments, the previous implementation manner is also applicable to the present embodiment and will not be described in detail in the present embodiment.

[0109] In this embodiment, the display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, notebook computer, car display, digital photo frame or navigator, especially a large-sized touch display panel.

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

[0111] 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,

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

[0113] This setting ensures that in a touch detection process, touch information analysis is performed only after all touch signals that need to be acquired have completed touch sensing, thereby simplifying the number of touch-related pads while ensuring the accuracy of touch analysis.

[0114] In view of the existing problems, the present invention develops a display panel and a driving method thereof, as well as a display device, and provides at least one simplified circuit, and the simplified circuit includes a decoder subcircuit and a selection subcircuit. The decoder subcircuit and the selection subcircuit cooperate to simplify the number of pads required for the first touch signal line, thereby reducing the number of touch lines occupied on the circuit board, which is conducive to the thinness and lightness of display products and has broad application prospects.

[0115] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: A display substrate and a touch layer arranged on the display substrate, the display panel includes a display area and a non-display area surrounding the display area, the touch layer includes a plurality of first touch signal lines arranged 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 comprises: 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 end of the decoder subcircuit is electrically connected to the second pad respectively. 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 signal to the selected fan-out line or read a touch signal from the fan-out line, Wherein, N is an integer greater than or equal to 1.

2. The display panel according to claim 1, characterized in that: 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 one-to-one and a second fan-out line corresponding to the reading signal line one-to-one, 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, 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 subcircuit of the second simplified circuit, and an input end of the selection subcircuit of the second simplified circuit outputs a touch reception signal.

3. The display panel according to claim 1, characterized in that: In each of the simplified circuits, the selection subcircuit includes a plurality of first transistors, the number of the plurality of first transistors is the same as the number of fan-out lines 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 subcircuit, the first electrodes are commonly electrically connected to one of the first pads, and the second electrodes are correspondingly electrically connected to the fan-out lines.

4. The display panel according to claim 1, characterized in that: The decoder subcircuit is n-2 n Decoder, n is an integer greater than or equal to 2.

5. The display panel according to claim 2, characterized in that: 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, the second side is opposite to the first side, the third side is opposite to the fourth side, The plurality of touch electrodes include a plurality of electrode rows arranged along a direction from the second side to the first side, and a plurality of electrode columns arranged along 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 send signal lines are electrically connected to the electrode rows in a one-to-one correspondence, or The read 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 of the electrode rows are electrically connected to one of the first sending signal lines and one of the second sending signal lines, respectively.

6. The display panel according to claim 3, characterized in that: The first transistor is an N-type transistor or a P-type transistor.

7. A display device, characterized in that: The invention comprises a display panel according to any one of claims 1 to 6.

8. The display device according to claim 7, characterized in that: Also includes: 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 2 times the second frequency n times, the decoder subcircuit is n-2 n Decoder, n is an integer greater than or equal to 2.

9. A method for driving a display panel according to any one of claims 1 to 6, characterized in that: include: outputting control codes to the second pads corresponding to each of the simplified circuits in sequence, and A touch signal is sent to the fan-out line or read from the fan-out line in synchronization with the output of each of the control codes.

10. The driving method according to claim 9, characterized in that: Also includes: Analyze the acquired touch signal to determine the touch position, The output frequency of the control code is a first frequency, the touch signal end frequency is analyzed to be a second frequency, and the first frequency is at least twice the second frequency. n times, the decoder subcircuit is n-2 n Decoder, n is an integer greater than or equal to 2.

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