Touch-control display panel and touch-control display apparatus

Abstract

Provided are a touch-control display panel and a touch-control display apparatus. The touch-control display panel comprises: a base substrate, wherein the base substrate comprises a display area and a peripheral area; a touch-control layer, which is disposed on the base substrate, wherein the touch-control layer comprises a plurality of touch-control electrodes located in the display area; a first bonding pad area, which is located in the peripheral area, wherein the first bonding pad area comprises a plurality of first terminals, the first bonding pad area comprises an output lead bonding pad area, the plurality of first terminals comprise a plurality of touch-control electrode terminals, and the plurality of touch-control electrode terminals are electrically connected to the plurality of touch-control electrodes by means of a plurality of lead-out wires, respectively; and at least one source driving chip, wherein the source driving chip is connected to the touch-control display panel by means of the plurality of first terminals of the first bonding pad area, the source driving chip comprises a touch-control analog front-end module, the touch-control analog front-end module comprises a plurality of touch-control electrode units, and the plurality of touch-control electrode units are electrically connected to the plurality of touch-control electrode terminals, respectively, and are configured to drive the touch-control electrodes of the touch-control display panel and collect touch-control data.

Description

Touch display panel and touch display device TECHNICAL FIELD

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

[0002] Organic Light-Emitting Diode (OLED) devices are attracting much attention due to their self-illumination, rich colors, fast response speed, wide viewing angle, light weight, thin thickness, low power consumption, and flexible display. OLED devices are now widely used in mobile phones, televisions, and wearable devices. In current large-size OLED display devices, a large number of electronic components, such as source drive chips, touch chips, and timing controller chips, still need to be reserved on the display module, resulting in high overall cost. How to gradually convert the numerous components in the display module from separate ICs to integrated ICs is an important research topic for researchers.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art. SUMMARY

[0004] In one aspect, a touch display panel is provided, comprising:

[0005] a substrate, comprising a display area and a peripheral area;

[0006] a touch layer disposed on the substrate, the touch layer comprising a plurality of touch electrodes in the display area; and

[0007] a first pad area in the peripheral area, the first pad area comprising a plurality of first terminals, wherein the first pad area comprises an output lead pad area; the plurality of first terminals comprises a plurality of touch electrode terminals disposed in the output lead pad area, the plurality of touch electrode terminals are respectively electrically connected to the plurality of touch electrodes through a plurality of lead-out traces; and

[0008] at least one source drive chip, the source drive chip being connected to the touch display panel through the plurality of first terminals of the first pad area,

[0009] wherein the source drive chip comprises a touch analog front-end module, the touch analog front-end module comprising a plurality of touch electrode units, and

[0010] the plurality of touch electrode units are respectively electrically connected to the plurality of touch electrode terminals, for driving the touch electrodes of the touch display panel and collecting touch data.

[0011] According to some exemplary embodiments, the plurality of touch electrodes comprises a plurality of touch drive electrodes arranged in a first direction and a plurality of touch sense electrodes arranged in a second direction, the first direction and the second direction intersecting;

[0012] A portion of the plurality of touch electrode units are electrically connected to the touch drive electrodes through the touch electrode terminals; and

[0013] Another portion of the plurality of touch electrode units are electrically connected to the touch sense electrodes through the touch electrode terminals.

[0014] According to some exemplary embodiments, the first pad area further comprises a plurality of first display signal terminals in the output lead pad area, for connecting with a display drive circuit inside the touch display panel.

[0015] According to some exemplary embodiments, the output lead pad area comprises a first area, a second area and a third area arranged in a first direction in sequence;

[0016] The plurality of first display signal terminals are arranged in an array in the first direction and the second direction in the second area;

[0017] A portion of the plurality of touch electrode terminals are arranged in an array in the first direction and the second direction in the first area; and

[0018] Another portion of the plurality of touch electrode terminals are arranged in an array in the first direction and the second direction in the third area.

[0019] According to some exemplary embodiments, the first pad area further comprises an input lead pad area, the input lead pad area being located on a side of the output lead pad area away from the display area;

[0020] The plurality of first terminals further comprise a plurality of signal input terminals arranged in the input lead pad area, for connecting with an external display touch drive board,

[0021] The plurality of signal input terminals comprise a plurality of second display signal terminals and a plurality of first touch signal terminals.

[0022] According to some exemplary embodiments, the input lead pad area comprises a fourth area, a fifth area and a sixth area arranged in a first direction in sequence;

[0023] The plurality of second display signal terminals are arranged in an array in the first direction and the second direction in the fifth area;

[0024] Some of the plurality of first touch signal terminals are arranged in an array in the first direction and the second direction in the fourth region; and

[0025] Another part of the plurality of first touch signal terminals are arranged in an array in the first direction and the second direction in the sixth region.

[0026] According to some exemplary embodiments, the touch analog front-end module further comprises a plurality of analog-to-digital conversion modules, each of which is connected to at least one of the touch electrode units.

[0027] According to some exemplary embodiments, the source driving chip further comprises a first power management module, a first interface circuit module, a first timing control module and a first storage unit module, at least one of the first power management module, the first interface circuit module, the first timing control module or the first storage unit module being used for the touch analog front-end module.

[0028] In another aspect, a touch display device is provided, comprising: the touch display panel according to any one of the preceding aspects; and

[0029] at least one flexible circuit board bonded with the touch display panel; and a display touch driving board electrically connected with the touch display panel through the flexible circuit board.

[0030] According to some exemplary embodiments, the display touch driving board comprises a timing controller and a touch digital back-end module, the timing controller comprising: a display type unit module for providing timing control signals and data display signals for the touch display panel; and the touch digital back-end module for algorithmic noise reduction processing of touch data and touch coordinate reporting point operation.

[0031] According to some exemplary embodiments, the timing controller further comprises an image data processing module, a second power management module, a second timing control module and a second storage unit module,

[0032] At least one of the image data processing module, the second power management module, the second timing control module or the second storage unit module is used for the touch digital back-end module.

[0033] According to some exemplary embodiments, at least one of the source driving chips is connected with the timing controller through at least one of the flexible circuit boards,

[0034] The flexible circuit board comprises third display signal terminals and second touch signal terminals, the third display signal terminals being connected with the second display signal terminals correspondingly; and the second touch signal terminals being connected with the first touch signal terminals correspondingly.

[0035] According to some exemplary embodiments, the touch control analog front-end module comprises a plurality of touch control data output interfaces; the timing controller comprises a plurality of touch control data input interfaces,

[0036] Each of the touch control data output interfaces is connected to one of the touch control data input interfaces; or,

[0037] A plurality of the touch control data output interfaces are connected to one of the touch control data input interfaces.

[0038] According to some exemplary embodiments, the touch control data output interfaces and the touch control data input interfaces transfer touch control data in the form of embedded clock differential signals.

[0039] According to some exemplary embodiments, the touch control display device further comprises a master control end, and the timing controller communicates with the master control end using an embedded display port protocol.

[0040] According to some exemplary embodiments, the display touch control driving board comprises at least one power management chip for providing voltage signals for the touch control analog front-end module in the source driving chip or the touch control digital back-end module in the timing controller, the power management chip comprises a first side edge and a second side edge oppositely arranged in a first direction; the display touch control driving board comprises a third side edge and a fourth side edge oppositely arranged in the first direction,

[0041] Wherein, the first side edge and the third side edge are spaced apart by a first interval distance in the first direction, the second side edge and the fourth side edge are spaced apart by a second interval distance in the first direction, and the ratio of the first interval distance to the second interval distance is between 0.8 and 1.2. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:

[0043] FIG. 1 is a structural schematic diagram of a touch control display device according to some prior exemplary embodiments;

[0044] FIG. 2 is a planar schematic diagram of a touch control display panel according to some prior exemplary embodiments, in which the connection relationship of touch control electrodes, source driving chips and flexible circuit boards is shown;

[0045] FIG. 3 is a planar schematic diagram of a touch control display panel according to some embodiments of the present disclosure;

[0046] FIG. 4 is a structural block diagram of a touch control display panel according to some embodiments of the present disclosure;

[0047] Fig. 5 is a plan view of an enlarged first pad region according to Fig. 3;

[0048] Fig. 6 is a structural block diagram of a source driving chip according to some embodiments of the present disclosure;

[0049] Fig. 7 is a structural block diagram of a touch analog front-end module according to some embodiments of the present disclosure;

[0050] Fig. 8 is a plan view of a touch display device according to some embodiments of the present disclosure;

[0051] Fig. 9 is a structural block diagram of a timing controller according to some embodiments of the present disclosure;

[0052] Figs. 10A-10C are plan views of a touch display device according to embodiments of the present disclosure, respectively;

[0053] Fig. 11 is a plan view of a touch display device according to embodiments of the present disclosure;

[0054] Fig. 12 is a plan view of a touch display device according to embodiments of the present disclosure.

[0055] It should be noted that, in the drawings used to describe and define the embodiments of the present disclosure, the dimensions of layers, structures, or regions can be exaggerated or minimized for the purpose of clarity, and are not necessarily drawn to scale. DETAILED DESCRIPTION

[0056] In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong within the scope of the present disclosure.

[0057] It should be noted that, in the drawings, the size and relative size of the elements can be exaggerated for clarity and / or descriptive purposes. Thus, the size and relative size of the elements in the drawings is not necessarily drawn to scale. In the description and drawings, identical or similar reference numerals refer to identical or similar parts.

[0058] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning of those of ordinary skill in the art. The terms "first", "second", and similar terms are used herein to distinguish one element from another, and are not necessarily used to describe a sequential or chronological order. The terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises several elements does not include only those elements but can include other elements not expressly listed or inherent to such process or method. The terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises several elements does not include only those elements but can include other elements not expressly listed or inherent to such process or method.

[0059] In the present disclosure, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer" and the like are used for the purpose of illustration and description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device, element or component referred to must have a particular orientation, be constructed or operated in a particular orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be construed as limiting the present disclosure.

[0060] In the present disclosure, directional terms "first direction" and "second direction" are used to describe different directions of the display panel, such as the row direction and the column direction of the display panel. It should be understood that such representation is only an exemplary description, and is not a limitation of the present disclosure.

[0061] In the present disclosure, unless otherwise specified, the expression "electrically connected" can mean that two components or elements are directly electrically connected, for example, component or element A is in direct contact with component or element B, and an electrical signal can be transmitted therebetween; can also mean that two components or elements are electrically connected through a conductive medium such as a conductive wire, for example, component or element A is electrically connected to component or element B through a conductive wire to transmit an electrical signal between the two components or elements; can also mean that two components or elements are electrically connected through at least one electronic component, for example, component or element A is electrically connected to component or element B through at least one thin film transistor to transmit an electrical signal between the two components or elements.

[0062] In the present disclosure, "about" means not strictly limited to the boundary, allowing a range of values within the process and measurement error.

[0063] In the present disclosure, "parallel" means that the angle formed by two straight lines is greater than or equal to -10° and less than or equal to 10°, so it also includes the state that the angle is greater than or equal to -5° and less than or equal to 5°.

[0064] In the development process of display panels and their electronic devices, from CRT (Cathode Ray Tube) display devices to LCD (Liquid Crystal Display) display devices and then to OLED display devices, the important driving / control chips on the display module have evolved from separate ICs to integrated ICs, reducing the number of electronic components and the cost of electronic components. This has been the direction that display industry enterprises have been striving for and pursuing for many years.

[0065] In the LCD field, the gate driving chip (Source Driver) is integrated on the panel as GOA (Gate Driven on Array), the touch chip and the source driving chip are integrated as TDDI chip (Touch and Display Driver Integration), the T-con chip (Timing Controller, also known as timing controller) and the source driving chip are integrated as TED chip, and the above-mentioned various display / touch integrated chip solutions have been widely used.

[0066] OLED display devices have high contrast, high brightness, low power consumption, and flexible folding characteristics, and have received widespread attention. They play an increasingly important role in consumer electronics such as mobile phones, tablets, and notebook computers. In the current medium and large-sized OLED display field, many key electronic components still need to be retained on the OLED display module. For example, the OLED display module includes multiple source driving chips, touch chips, T-con chips, multiple power management chips PMIC (Power Management IC), level conversion chips, Flash chips, and other separate IC chips.

[0067] The use of separate touch chip design will increase the number of electronic components, resulting in high cost. On the other hand, the touch chip is usually designed on the display touch driving board (also referred to as PCB board). Due to the large number of connection lines between the touch chip and the touch electrode, a large number of touch lines need to be designed on the display touch driving board, and the display touch driving board needs to use a multi-layer high-order HDI (High Density Interconnector) PCB board, resulting in a large size of the PCB board and increasing the cost.

[0068] FIG. 1 is a structural schematic diagram of some existing touch display devices; and FIG. 2 is a planar schematic diagram of some existing touch display panels, showing the connection relationship between the touch electrode, the source driving chip, and the flexible circuit board.

[0069] Exemplarily, in some existing touch display devices, with reference to FIG. 1, a touch display device 100 includes a touch display panel 10, at least one flexible printed circuit (FPC) board 20 bonded with the touch display panel 10, and a display touch driving board 30. The touch display driving board 30 and the touch display panel 10 can be connected through one or more FPC boards 20, so as to realize signal transmission between the touch display driving board 30 and the touch display panel 10, and realize different driving display effects. For example, the FPC board 20 and the touch display panel 10 can be bonded and connected in an FOP bonding area, and the FPC board 20 and the touch display driving board 30 can be bonded and connected in an FOB bonding area. The touch display device 100 can further include a source driving chip 11, a timing controller T-con, and a touch chip 50. Among them, the source driving chip 11 is usually designed on the touch display panel 10, and the timing controller T-con and the touch chip 50 are usually designed on the touch display driving board 30.

[0070] Exemplarily, with reference to FIGS. 1 and 2, the touch display panel 10 can include a plurality of touch electrodes 121, for example, a plurality of touch sensing electrodes RX and a plurality of touch driving electrodes TX. Since the touch chip 50 is located on the touch display driving board 30, and a plurality of pins in the touch chip 50 need to be connected with the touch electrodes 121 located in the touch display panel 10, a large number of touch lead-out wires need to be designed on the display touch driving board 30. Therefore, the display touch driving board needs to use a multi-layer high-order HDI (High Density Interconnector) PCB board, which leads to a large size of the PCB and also increases the cost.

[0071] Exemplarily, with reference to FIGS. 1 and 2, the touch electrodes 121 of the touch display panel 10 and the pins in the touch chip 50 need to be electrically connected through the leads in the FPC board. Therefore, the FOP bonding area where the touch display panel 10 is connected with the FPC board 20 needs to be designed with more touch signal terminals, for example, the touch terminals 510 located in the FOP bonding area on the lower side of FIG. 2. Correspondingly, the number of pins in the FPC board bonded with the touch display panel 10 also needs to be increased, so as to increase the pin density in the FPC board and reduce the spacing between the pins, which adversely affects the yield of the display module.

[0072] The inventors have found that the touch chip in the existing touch display device mainly includes the following modules: a touch analog front-end module AFE (Analog Front End), a touch digital back-end module DBE (Digital Back End), a power management module PMU (Power Management Unit), and an interface circuit module.

[0073] The touch analog front-end module mainly includes the following modules or units: a touch scanning control circuit, a programmable gain amplifier PGA or an operational amplifier OP-AMP, an anti-alias filter, a plurality of analog-to-digital conversion modules ADC, a touch driving electrode unit, and a touch sensing electrode unit. Each analog-to-digital conversion module ADC corresponds to at least one touch sensing pin, that is, at least one touch sensing channel. Taking a certain touch chip of a flexible OLED notebook computer as an example, the touch chip can support a 14-inch display screen under the condition of supporting an active stylus, which includes 49 touch driving pins and 74 touch sensing pins. If the number of analog-to-digital conversion modules ADC in the internal configuration of the touch chip is: the number of touch sensing pins = 1:1, then at least 74 analog-to-digital conversion modules ADC are needed. If the number of analog-to-digital conversion modules ADC in the internal configuration of the touch chip is: the number of touch sensing pins = 1:2, then at least 37 analog-to-digital conversion modules ADC are needed.

[0074] The touch digital back-end module mainly includes the following modules or units: an image data processing module, such as an MCU (Microcontroller Unit) or a DSP (Digital Signal Processing) (including a digital filter, a hardware accelerator, etc.), a clock module, a storage unit module (SRAM or Flash), an interface circuit module, and an active pen control module.

[0075] The two core modules of the touch chip are the touch analog front-end module AFE and the touch digital back-end module DBE. For the functions and line connection relationships of the modules in the touch chip, the functional modules in the touch chip can be separated and then integrated into other existing chips or modules, so that the separated touch chip can be cancelled. For example, the touch analog front-end module AFE in the touch chip can be integrated into a gate drive chip, and the touch digital back-end module DBE in the touch chip can be integrated into a timing controller T-con chip, so that the touch chip can be omitted to reduce the cost; at the same time, the number of pins in the FPC board can be reduced, and the yield of the display module can be improved.

[0076] FIG. 3 is a plan view of a touch display panel according to some embodiments of the present disclosure; and FIG. 4 is a structural block diagram of a touch display panel according to some embodiments of the present disclosure.

[0077] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 3, a touch display panel 10 is provided. The touch display panel 10 comprises a substrate 1. Exemplarily, the substrate can comprise a flexible substrate, such as a PI substrate. The substrate 1 comprises a display area AA and a peripheral area NA. The touch display panel 10 further comprises a touch layer 120 disposed on the substrate 1, which can comprise a plurality of touch electrodes 121 located in the display area AA. The touch display panel 10 further comprises a first pad area 110 located in the peripheral area NA.

[0078] Exemplarily, the first pad area 110 can be used to bind a plurality of source driving chips.

[0079] Exemplarily, the touch display panel 10 can further comprise a driving circuit layer, a light emitting layer, a cathode layer, and an encapsulation layer disposed between the substrate 1 and the touch layer 120. For example, the encapsulation layer can be a multi-layer thin film encapsulation layer.

[0080] Exemplarily, the touch display panel 10 can further comprise a polarizer, an OCA transparent optical adhesive, a cover plate, and the like disposed on a side of the touch layer 120 away from the substrate 1.

[0081] Exemplarily, continuing to refer to FIG. 3, the first pad area 110 can comprise a plurality of first terminals 1000. The plurality of first terminals 1000 can be used to bind and connect with a plurality of pins of a source driving chip. For example, the first pad area 110 comprises an output lead pad area OLB. The plurality of first terminals 1000 comprises a plurality of touch electrode terminals 511 disposed in the output lead pad area OLB. The plurality of touch electrode terminals 511 can be electrically connected to the plurality of touch electrodes 121 through a plurality of lead-out wires 150 respectively, so as to be capable of collecting touch data or driving the touch electrodes. For another example, the plurality of first terminals 1000 can further comprise a plurality of first display signal terminals 111 disposed in the output lead pad area OLB. The first display signal terminals 111 can be connected to a driving circuit layer inside the display panel correspondingly, so as to be capable of providing driving control signals for the driving circuit layer. For another example, the first pad area 110 can further comprise an input lead pad area I LB located on a side of the output lead pad area OLB away from the display area AA. The plurality of first terminals 1000 can further comprise a plurality of signal input terminals 200 located in the input lead pad area I LB, which can be used to connect with an external display touch driving board (PCB board), so as to realize communication between the source driving chip and the external touch display driving board (PCB board), and further realize driving control of the touch display panel.

[0082] Exemplarily, the plurality of signal input terminals 200 can include a plurality of second display signal terminals 112 and a plurality of first touch signal terminals 512. The plurality of second display signal terminals 112 can be electrically connected with the partial pins of the external PCB board for transmitting display signals, so as to transmit display related signals. The plurality of first touch signal terminals 512 can be electrically connected with the partial pins of the external PCB board for transmitting touch signals, so as to transmit touch related signals. The touch display panel 10 can further include a FOP binding area for binding connection with the FPC. The FOP binding area is provided with a plurality of terminals, and the plurality of terminals in the FOP binding area can be binding connected with the plurality of pins in the FPC in the FOP binding area, so as to realize the electrical connection between the touch display panel 10 and the FPC board. For example, the FPC board includes a plurality of third display signal terminals 113 and a plurality of second touch signal terminals 513 in the FOP binding area. The plurality of third display signal terminals 113 can be electrically connected with the plurality of second display signal terminals 112 respectively. The plurality of second touch signal terminals 513 can be electrically connected with the plurality of first touch signal terminals 512 respectively. Further, the plurality of terminals in the FOP binding area are electrically connected with the external touch display driving board (PCB board) through the wirings in the FPC, so as to realize the electrical connection between at least part of the plurality of first terminals 1000 in the first pad area 110 and the external touch display driving board (PCB board).

[0083] Exemplarily, in combination with reference to FIGS. 3 and 4, the touch display panel 10 further includes at least one source driving chip 11, which can be located in the peripheral area of the touch display panel. Exemplarily, the number of source driving chips can also be multiple. The source driving chip 11 can include a plurality of pins. The source driving chip 11 is connected to the touch display panel 10 by binding connection of the plurality of pins of the source driving chip 11 with the plurality of first terminals 1000 of the first pad area 110. Since the plurality of signal input terminals 200 included in the input lead bonding pad area ILB in the first pad area 110 are electrically connected with the external touch display driving board (PCB board) through the FPC board, the source driving chip 11 can also be electrically connected with the external touch display driving board (PCB board), so as to realize the signal transmission between the touch display driving board (PCB board) and the source driving chip 11.

[0084] Exemplarily, in combination with reference to FIGS. 4 and 6, the source driving chip 11 can include a touch analog front end module AFE, which includes a plurality of touch electrode units TRX, such as a first touch electrode unit TRX-1, a second touch electrode unit TRX-2, and an Nth touch electrode unit TRX-N. The plurality of touch electrode units TRX in the touch analog front end AFE can include a part of the plurality of pins in the source driving chip 11, which are used to be electrically connected with the touch electrodes in the display area. Therefore, in the embodiments of the present disclosure, the touch electrode unit can also be referred to as a touch electrode channel pin. In combination with reference to FIG. 3, when the plurality of pins of the source driving chip 11 are bonded to the plurality of first terminals 1000 of the first pad area 110, the plurality of touch electrode units TRX of the touch analog front end AFE can be correspondingly connected with the plurality of touch electrode terminals 511 and the plurality of touch signal terminals 512, so that the touch electrodes of the touch display panel can be driven or touch data can be collected.

[0085] Exemplarily, in some embodiments of the present disclosure, in combination with reference to FIG. 3, the plurality of touch electrodes 121 include a plurality of touch driving electrodes TX arranged at intervals along a first direction X and a plurality of touch sensing electrodes RX arranged at intervals along a second direction Y, the first direction X and the second direction Y intersecting. The plurality of touch electrode units TRX can be electrically connected with the touch sensing electrodes RX and / or the touch driving electrodes TX in the touch display panel, respectively. For example, a part of the plurality of touch electrode units TRX in the touch analog front end module AFE can be electrically connected with the touch driving electrodes TX through the touch electrode terminals 511. Another part of the plurality of touch electrode units TRX can be electrically connected with the touch sensing electrodes RX through the touch electrode terminals 511. In this way, the touch analog front end module AFE can drive the touch electrodes or collect touch data.

[0086] By integrating the touch analog front end module AFE into the source driving chip 11, the touch electrode units in the touch analog front end module AFE can be electrically connected with the touch electrodes 121 in the display area AA of the touch display panel through the plurality of touch electrode terminals 511 of the first pad area 110. The ports of the touch analog front end module AFE that need to communicate with the external touch display driving board (PCB board) can only reserve the part of pins (or touch signal units) corresponding to the plurality of first touch signal terminals 512 as shown in FIG. 3. The plurality of first touch signal terminals 512 are electrically connected with the plurality of second touch signal terminals 513 through the lead-out wires, respectively. The plurality of touch signal terminals 513 are connected with the FPC board, and the FPC board is connected with the external touch display driving board (PCB board), so that the signal transmission between the touch display driving board (PCB board) and the touch analog front end module AFE is realized.

[0087] Through such a design, the number of touch-related wires on the display touch driving board (or PCB board) can be greatly reduced, the number of layers of the PCB board can be correspondingly reduced (for example, from 8 layers of PCB to 6 layers of PCB or 4 layers of PCB), and the size of the display touch driving board can be further reduced, thereby reducing the cost. On the other hand, the number of pins related to touch signals in the FPC board can be greatly reduced, which is beneficial to improving the yield of the display module.

[0088] For example, taking a 14-inch flexible OLED notebook computer product as an example (under the condition of supporting an active stylus), when a separate touch chip is used, 49 touch driving pin wires, 74 touch sensing pin wires, and about 10 communication interface wires are needed on the touch display driving board (PCB board).

[0089] In some embodiments of the present disclosure, by adopting a design of integrating a touch analog front-end module (AFE) into the source driving chip 11, the touch driving pin wires and the touch sensing pin wires no longer need to be laid out on the touch display driving board (PCB board), and therefore, the number of touch-related wires on the touch display driving board (PCB board) can be reduced by more than 80%, thereby reducing the cost of the PCB board.

[0090] FIG. 5 is an enlarged plan view of the first pad area in FIG. 3.

[0091] For example, in some embodiments of the present disclosure, referring to FIG. 5, the output lead pad area OLB includes a first region S1, a second region S2, and a third region S3 arranged in sequence along a first direction X. A plurality of first display signal terminals 111 can be arranged in an array in the second region S2 along the first direction X and a second direction Y. Part of a plurality of touch electrode terminals 511 can be arranged in an array in the first region S1 along the first direction X and the second direction Y.

[0092] Another part of the plurality of touch electrode terminals 511 can be arranged in an array in the third region S3 along the first direction X and the second direction Y. That is, the plurality of touch electrode terminals 511 can be located on both sides of the plurality of first display signal terminals 111.

[0093] For example, the input lead pad area ILB includes a fourth region S4, a fifth region S5, and a sixth region S6 arranged in sequence along the first direction X. A plurality of second display signal terminals 112 are arranged in an array in the fifth region S5 along the first direction X and the second direction Y. Part of a plurality of first touch signal terminals 512 are arranged in an array in the fourth region S4 along the first direction X and the second direction Y. Another part of the plurality of first touch signal terminals 512 are arranged in an array in the sixth region S6 along the first direction X and the second direction Y.

[0094] Exemplarily, the output lead bonding pad area OLB can include at least one row of terminals. For example, the output lead bonding pad area OLB can include a single row of terminals, two rows of terminals, three rows of terminals, or more rows of terminals.

[0095] Exemplarily, the input lead bonding pad area ILB can include at least one row of terminals. For example, the input lead bonding pad area ILB can include a single row of terminals, two rows of terminals, or more rows of terminals.

[0096] It should be noted that FIG. 5 is only an exemplary illustration of the arrangement of the terminals in the first bonding pad area, but embodiments of the present disclosure are not limited thereto. In embodiments of the present disclosure, the arrangement of the terminals in the first bonding pad area can be flexibly designed according to the number of terminals and the connection mode of the wiring to the outside.

[0097] Exemplarily, referring to FIGS. 3 and 6, the plurality of touch electrode units TRX in the touch analog front-end module AFE in each source driving chip 11 can be connected to the touch driving electrodes TX and / or the touch sensing electrodes RX in the corresponding area of the touch display panel. The touch electrode units TRX in the touch analog front-end module AFE connected to the touch driving electrodes TX in the touch display panel can be set as touch driving pins, and the touch electrode units TRX in the touch analog front-end module AFE connected to the touch sensing electrodes RX in the touch display panel can be set as touch sensing pins. The touch electrode units TRX in the touch analog front-end module AFE in each source driving chip 11 can be freely and flexibly configured as touch driving pins or touch sensing pins according to actual specific needs. Through such a design, the flexibility of the peripheral touch wiring design on the touch display panel is greatly enhanced, the number of touch channel wiring vias and wiring winding is greatly reduced, and it is beneficial to the narrow frame design of the OLED panel.

[0098] FIG. 6 is a structural block diagram of a source driving chip according to some embodiments of the present disclosure; and FIG. 7 is a structural block diagram of a touch analog front-end module according to some embodiments of the present disclosure.

[0099] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 6, the source driving chip 11 in the touch display panel can include a touch scan control module 1101, a touch analog front-end module AFE, a line latch module 1102, a level shifter module 1103, a digital-to-analog conversion module DAC, a voltage buffer module 1104, a first power management module PMU1, a first interface circuit module 1105, a first timing control module OSC1, a first storage unit module 1106, and a logic control module 1107.

[0100] For example, at least one of the first power management module PMU1, the first interface circuit module 1105, the first timing control module OSC1, or the first storage unit module 1106 can be used for the touch analog front end module. That is, when the touch analog front end module AFE is integrated into the source driving chip 11, part of the modules in the touch analog front end module AFE can be integrated and shared with part of the functional modules in the original source driving chip 11. For example, one or more of the first power management module PMU1, the first interface circuit module 1105, the first timing control module OSC1, or the first storage unit module 1106 can be used for both the touch analog front end module AFE and the source driving chip 11. For example, the first interface circuit module 1105 of the source driving chip 11 can include a display communication unit 051 and a touch communication unit 052. The display communication unit 051 can be connected in communication with a display type unit module in a timing controller T-con chip. For example, the display communication unit 051 and the display type unit module in the T-con chip can transmit various types of signals such as BCL (Bi-directional Command Link), PHI (Point-to-point High-speed Interface), etc. The touch communication unit 052 can be connected in communication with a touch type unit module in the T-con, for example, to transmit touch data. For another example, the first power management module PMU1 can simultaneously provide the required voltages for the touch analog front end module AFE and other modules of the source driving chip.

[0101] By such a design, it is beneficial to simplify the structure of the source driving chip 11 integrated with the touch analog front end module AFE, part of the module functions are integrated and shared, which can reduce the number of components, reduce the size of the source driving chip, and reduce the cost.

[0102] For example, the plurality of line latch modules 1102 can include a plurality of line latches, and the plurality of line latches can be switched between two stable states by two stable state control signals of 1 and 0.

[0103] For example, the source driving chip can further include a gray scale voltage processing module GMA, which can transmit different gray scale voltage data to the digital-to-analog conversion module DAC. For example, the different gray scale voltage data can include a plurality of voltage data of different gray scales such as VGAM1, VGAM2, …, VGAM13, so as to control corresponding pixels to achieve different display effects.

[0104] Exemplarily, in some embodiments of the present disclosure, referring to FIGS. 6 and 7, the touch analog front end module AFE in the source driving chip can include a plurality of touch electrode units TRX and a plurality of analog-to-digital conversion modules ADC, for driving the touch electrodes of the touch display panel and collecting touch data. One analog-to-digital conversion module ADC is connected to at least one touch electrode unit TRX.

[0105] In some embodiments, one analog-to-digital conversion module ADC can correspond to one touch electrode unit TRX.

[0106] In some embodiments, one analog-to-digital conversion module ADC can be connected to a plurality of touch electrode units TRX. For example, one analog-to-digital conversion module ADC can be connected to two touch electrode units TRX. Alternatively, one analog-to-digital conversion module ADC can be connected to three touch electrode units TRX.

[0107] Exemplarily, the touch analog front end module AFE can further include at least one low-pass filter LPF.

[0108] FIG. 8 is a plan view of a touch display device according to some embodiments of the present disclosure; and FIG. 9 is a structural block diagram of a timing controller according to some embodiments of the present disclosure.

[0109] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 8, a touch display device 100 is provided. The touch display device can include the touch display panel 10 of any of the above embodiments.

[0110] It should be noted that the touch display device can include, but is not limited to, electronic paper, mobile phones, tablet computers, displays, notebook computers, digital photo frames, navigation devices, and any product or component having a display function. It should be understood that the touch display device has the same beneficial effects as the touch display panel provided in the above embodiments.

[0111] In some embodiments, continuing to refer to FIG. 8, the touch display device 100 can further include at least one FPC board 20 bonded to the touch display panel 10, and a display touch driving board 30 connected to the touch display panel 10 through the FPC board 20. For example, the display touch driving board 30 can include a PCB board and a plurality of electronic components disposed on the PCB board. For example, the plurality of electronic components can include a timing controller T-con, at least one power management chip (PMIC chip), a level shift chip, a cache chip Flash, and the like.

[0112] Exemplarily, the touch display panel 10 can include a plurality of source driving chips 11, and the source driving chips 11 can include a touch analog front end module AFE. The plurality of source driving chips 11 in the touch display panel 10 can be connected to the display touch driving board 30 respectively through a plurality of FPC boards. For example, each source driving chip 11 can be connected to the display touch driving board 30 through a corresponding FPC board, so as to realize signal transmission between the plurality of source driving chips 11 and the display touch driving board 30.

[0113] Exemplarily, the touch display panel 10 can include a bending area 180 located on a side of the source driving chip 11 close to the display area AA. In some embodiments, the touch display panel 10 can be designed to be bent at the bending area 180, so as to design the driving module to the side or the backlight surface of the touch display panel, which is beneficial to realize narrow frame of the touch display panel.

[0114] In some embodiments, in combination with reference to FIGS. 8 and 9, the display touch driving board 30 can include a timing controller T-con. The timing controller T-con can provide a plurality of signals required by the touch display panel, such as timing control signals, display data signals and other control signals (for example, gate driving signals), and the timing controller T-con can also perform data processing on the display data to improve the picture quality of the panel.

[0115] The timing controller T-con can include display type unit modules, such as a display signal receiving module T02 and a display signal sending module T05. The display type unit modules can be used to provide timing control signals and data display signals for the touch display panel 10. For example, at least one source driving chip 11 is connected to the timing controller T-con through at least one FPC board, so that the timing controller T-con can provide timing control signals and data display signals for the source driving chip 11, thereby controlling the touch display panel to realize display of different pictures.

[0116] In some embodiments, in combination with reference to FIG. 9, the timing controller T-con can also include a touch digital back end module DBE. The touch digital back end module DBE can be used for algorithmic noise reduction processing of touch data and touch coordinate reporting point operation.

[0117] The touch digital back end module DBE is another main functional module in the separate touch chip. In the embodiments of the present disclosure, by integrating the touch digital back end module DBE into the timing controller T-con, the timing controller T-con can be used to complete the algorithmic noise reduction processing of touch data and the touch coordinate reporting point operation, so that it is not necessary to separately design the separate touch chip, which is beneficial to reduce the number of components and reduce the cost.

[0118] For example, the touch digital back end module DBE includes image data processing module, touch scanning code control module, power management module, timing control module, storage unit module, active pen control module and the like.

[0119] In some embodiments of the present disclosure, with reference to FIG. 9, the timing controller T-con can include image data processing module T04, second power management module PMU2, second timing control module OSC2, second storage unit module T03, display signal receiving module T02, display signal sending module T05 and interface circuit module T01. When the touch digital back end module DBE is integrated into the timing controller T-con, most of the functional modules in the touch digital back end module DBE can be integrated with some of the functional modules in the original timing controller T-con. For example, at least one of the image data processing module T04, the second power management module PMU2, the second timing control module OSC2, the second storage unit module T03 or the interface circuit module T01 in the timing controller T-con can be used for the touch digital back end module DBE. By such design, the functional requirements of the touch digital back end module DBE and the timing controller T-con can be met together, so that the size of the timing controller T-con can be reduced and the cost can be lowered. For example, the integrated interface circuit module T01 can include display interface circuit T011 and touch interface circuit T012. The integrated second power management module PMU2 includes display power management unit PMU21 and touch power management unit PMU22.

[0120] For example, the touch digital back end module DBE can include active pen control module T06, which can be used for encoding and decoding of touch signals.

[0121] For example, the timing controller T-con can further include gate drive circuit GOA, which can be used to provide gate drive signals for the touch display panel.

[0122] For example, the timing controller T-con can further be connected with the host end Host. The timing controller T-con can upload the reported point coordinates to the host end Host after algorithmic noise reduction processing and touch coordinate point reporting operation on the touch data transmitted by the internal image data processing module to all source drive chips of the OLED module.

[0123] FIGS. 10A-10C are respectively planar schematic diagrams of a touch display device according to embodiments of the present disclosure.

[0124] Exemplarily, in the embodiments of the present disclosure, in combination with reference to FIGS. 10A-10C, the touch analog front end module AFE includes a plurality of touch data output interfaces. The timing controller T-con includes a plurality of touch data input interfaces. The plurality of touch data output interfaces in the touch analog front end module AFE and the plurality of touch data input interfaces in the timing controller T-con can transmit touch data through touch data signal wires ATL.

[0125] Exemplarily, the touch data sampled by the touch analog front end module AFE can be transmitted to the timing controller T-con through the corresponding touch data output interface in the form of an embedded clock differential signal. The timing controller T-con aggregates the touch data delivered by all the source driving chips in the touch display panel through an internal data processing module, performs algorithmic noise reduction processing on the touch data, and performs touch coordinate reporting point operation, and then uploads the reporting point coordinates to the host end Host through an SPI / 12C / 13C interface.

[0126] In some embodiments, with reference to FIG. 10A, each touch data output interface can correspond to connecting one touch data input interface. That is, there is an independent touch data signal wire ATL between one touch data output interface and one touch data input interface.

[0127] In some embodiments, in combination with reference to FIGS. 10B and 10C, a plurality of touch data output interfaces can correspond to connecting the same touch data input interface. That is, there is a shared touch data signal wire ATL between the plurality of touch data output interfaces and one touch data input interface. For example, in FIG. 10B, there is a shared touch data signal wire ATL between 2 touch data output interfaces and one touch data input interface. For another example, in FIG. 10C, there is a shared touch data signal wire ATL between 4 touch data output interfaces and one touch data input interface.

[0128] Compared with SPI and 12C, the transmission rate of the embedded clock differential signal is very high, and the touch data of different regions of the touch display panel acquired by a plurality of source driving chips can be delivered to the internal storage unit module of the timing controller T-con through the same touch data signal wire ATL. In this way, the number of touch data input interfaces required on the timing controller T-con chip can be reduced, which is beneficial to reduce the chip cost and size.

[0129] FIG. 11 is a plan view of a touch display device according to an embodiment of the present disclosure.

[0130] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 11, the touch display device further comprises a host Host. The timing controller T-con and the host Host can communicate using an embedded display port protocol (eDP). Compared with FIG. 8, when the timing controller T-con chip uses the eDP protocol, the touch coordinates can be reported to the host Host or the touch data can be transmitted to the host Host using the auxiliary channel (AUX Channel) of the eDP interface of the timing controller T-con chip, that is, the SPI / 12C / I3C pins used by the timing controller T-con chip for communication with the host Host can be cancelled.

[0131] In some embodiments, the touch digital back-end module DBE is embedded in the timing controller T-con chip, and the use of the auxiliary channel (AUX Channel) of the eDP interface to transfer touch data has a special advantage, which can further reduce the number of communication interface pins between the timing controller T-con and the host Host, and is beneficial to reducing the size of the display touch driving board.

[0132] FIG. 12 is a plan view of a touch display device according to an embodiment of the present disclosure.

[0133] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 12, the display touch driving board 30 can further comprise at least one power management chip PMIC, which can be used to provide a voltage signal for the touch analog front-end module AFE in the source driving chip 11 or the touch digital back-end module DBE in the timing controller T-con. The power management chip can also provide operating voltage for other units / modules.

[0134] Exemplarily, the power management chip PMIC comprises a first side L1 and a second side L2 oppositely arranged in a first direction X. The display touch driving board 30 comprises a third side L3 and a fourth side L4 oppositely arranged in the first direction X. The first side L1 and the third side L3 are spaced apart by a first interval distance D1 in the first direction X, and the second side L2 and the fourth side L4 are spaced apart by a second interval distance D2 in the first direction X. The ratio of the first interval distance D1 to the second interval distance D2 is between 0.8 and 1.2. That is, the power management chip PMIC can be designed at the middle position of the display touch driving board (PCB board), so as to ensure that the wiring impedance from the power management chip PMIC to the touch analog front-end modules AFE of the plurality of source driving chips is as same as possible or close, thereby ensuring that the power supply voltage provided to each touch analog front-end module AFE is consistent, which is beneficial to improving the capacitance consistency level of the display touch module.

[0135] While some embodiments of the general inventive concept have been shown and described, it is to be understood that changes can be made in embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A touch display panel, characterized in that, The application relates to a touch display panel, comprising: a substrate, comprising a display area and a peripheral area; a touch layer disposed on the substrate, comprising a plurality of touch electrodes in the display area; and a first pad area in the peripheral area, comprising a plurality of first terminals, wherein the first pad area comprises an output lead pad area; the plurality of first terminals comprises a plurality of touch electrode terminals disposed in the output lead pad area, and the plurality of touch electrode terminals are electrically connected to the plurality of touch electrodes through a plurality of lead-out traces; and at least one source driving chip connected to the touch display panel through the plurality of first terminals of the first pad area, wherein the source driving chip comprises a touch analog front-end module, the touch analog front-end module comprises a plurality of touch electrode units, and the plurality of touch electrode units are electrically connected to the plurality of touch electrode terminals for driving the touch electrodes of the touch display panel and collecting touch data. 2.The touch display panel of claim 1, wherein, The plurality of touch electrodes comprise a plurality of touch driving electrodes arranged at intervals along a first direction and a plurality of touch sensing electrodes arranged at intervals along a second direction, and the first direction and the second direction intersect; a part of the plurality of touch electrode units are electrically connected to the touch driving electrodes through the touch electrode terminals; and another part of the plurality of touch electrode units are electrically connected to the touch sensing electrodes through the touch electrode terminals. 3.The touch display panel of claim 1 or 2, wherein, The first pad area further comprises a plurality of first display signal terminals in the output lead pad area for connecting to a display driving circuit inside the touch display panel. 4.The touch display panel of claim 3, wherein, The output lead pad area comprises a first area, a second area and a third area arranged in sequence along the first direction; the plurality of first display signal terminals are arranged in an array in the second area along the first direction and the second direction; a part of the plurality of touch electrode terminals are arranged in an array in the first area along the first direction and the second direction; and another part of the plurality of touch electrode terminals are arranged in an array in the third area along the first direction and the second direction. 5.The touch display panel of any one of claims 1-4, wherein, The first pad area further comprises an input lead pad area located on a side of the output lead pad area away from the display area; the plurality of first terminals further comprise a plurality of signal input terminals disposed in the input lead pad area for connecting to an external display touch driving board, the plurality of signal input terminals comprise a plurality of second display signal terminals and a plurality of first touch signal terminals. 6.The touch display panel of claim 5, wherein, The input lead pad area comprises a fourth area, a fifth area and a sixth area arranged in sequence along the first direction; the plurality of second display signal terminals are arranged in an array in the fifth area along the first direction and the second direction; a part of the plurality of first touch signal terminals are arranged in an array in the fourth area along the first direction and the second direction; and another part of the plurality of first touch signal terminals are arranged in an array in the sixth area along the first direction and the second direction. 7.The touch display panel of any one of claims 1-6, wherein, The touch analog front-end module further comprises a plurality of analog-to-digital conversion modules, each of the analog-to-digital conversion modules being connected to at least one of the touch electrode units. 8.The touch display panel of any one of claims 1-7, wherein, The source driving chip further comprises a first power management module, a first interface circuit module, a first timing control module and a first storage unit module, At least one of the first power management module, the first interface circuit module, the first timing control module or the first storage unit module is used for the touch analog front-end module.

9. A touch display device, comprising: Comprise: The touch display panel according to any one of claims 1-8; At least one flexible circuit board bound with the touch display panel; And The display touch driving board is electrically connected with the touch display panel through the flexible circuit board.

10. The touch display device of claim 9, wherein, The display touch driving board comprises a timing controller and a touch digital back-end module, the timing controller comprises a display type unit module for providing timing control signals and data display signals for the touch display panel; and the touch digital back-end module is used for algorithm noise reduction processing of touch data and touch coordinate point reporting operation.

11. The touch display device of claim 10, wherein, The timing controller further comprises an image data processing module, a second power management module, a second timing control module and a second storage unit module, At least one of the image data processing module, the second power management module, the second timing control module or the second storage unit module is used for the touch digital back-end module.

12. The touch display device according to claim 10 or 11, wherein, At least one of the source driving chips is connected with the timing controller through at least one of the flexible circuit boards, The flexible circuit board comprises third display signal terminals and second touch signal terminals, the third display signal terminals are connected with the second display signal terminals correspondingly; and the second touch signal terminals are connected with the first touch signal terminals correspondingly.

13. The touch display device of any one of claims 10-12, wherein, The touch analog front-end module comprises a plurality of touch data output interfaces; and the timing controller comprises a plurality of touch data input interfaces, Each of the touch data output interfaces is connected with one of the touch data input interfaces; or a plurality of the touch data output interfaces are connected with one of the touch data input interfaces.

14. The touch display device of claim 13, wherein, The touch data output interfaces and the touch data input interfaces adopt an embedded clock differential signal form to transfer touch data.

15. The touch display device of any one of claims 10-14, wherein, The touch display device further comprises a master control end, and the timing controller and the master control end adopt an embedded display port protocol for communication.

16. The touch display device of any one of claims 10-15, wherein, The display touch driving board comprises at least one power management chip for providing voltage signals for the touch analog front-end module in the source driving chip or the touch digital back-end module in the timing controller, the power management chip comprises a first side edge and a second side edge arranged oppositely in a first direction; and the display touch driving board comprises a third side edge and a fourth side edge arranged oppositely in the first direction, Wherein, the first side edge and the third side edge are spaced apart by a first interval distance in the first direction, the second side edge and the fourth side edge are spaced apart by a second interval distance in the first direction, and the ratio of the first interval distance to the second interval distance is between 0.8 and 1.2.

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