Touch display device, chip and electronic equipment

Abstract

The utility model relates to a touch control display device, chips and electronic equipment, and the touch control display device comprises N touch control display chips and a touch control display panel, each touch display chip is connected with the touch display panel; the touch display panel comprises N touch display areas; the N touch display chips and the N touch display areas are in one-to-one correspondence; the touch display chip is used for driving the corresponding touch display area to display in a display stage and scanning the corresponding touch display area in a scanning stage; the display stage and the scanning stage are alternately performed; the working modes of the touch display chip comprise a single-particle mode and an N-particle cascade mode; when N is equal to 1, the touch display chip works in a single mode; in Ngt; when 1, the touch display chips work in an N-piece cascade mode, and the N touch display chips are cascaded; according to the utility model, the physical size of the drivable touch display panel can be expanded, the realization of information display and touch functions is facilitated, and the man-machine interaction experience can be optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to touch display panel drive field especially relates to a touch display device, chip and electronic equipment. BACKGROUND

[0002] Touch and display driver integration integrated circuit (TDDI IC) is a kind of chip that can realize the integration of touch function and display function, and has wide application in vehicle display field.In the field of vehicle human-computer interaction, vehicle central control panel (panel) mostly relies on independent (i.e.single) TDDI chip to realize display and touch function.However, since the impedance of circuit on panel is sensitively influenced by actual size of panel, the physical size of panel that single TDDI chip can drive is limited, which leads to the size of vehicle central control panel cannot be large, and the information that can be displayed on panel is less in vehicle application;At the same time, since the size of panel is small, it is not conducive to the realization of touch function, and human-computer interaction function still needs to be realized through another physical button. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem of how to expand the physical size of the touch display panel that can be driven and optimize the user's human-computer interaction experience.

[0004] In order to solve the above technical problem, according to an embodiment of the utility model, a kind of touch display device is provided, including N touch display chips and touch display panel;N is positive integer;Each touch display chip is connected with the touch display panel;The touch display panel includes N touch display areas;The N touch display chips and the N touch display areas are one-to-one corresponding;The N touch display chips are used to drive respective corresponding touch display area to display in display stage, and scan respective corresponding touch display area in scanning stage;The display stage and the scanning stage are alternately carried out;The N touch display chips drive the touch display panel to display one frame to be displayed by at least one display stage, complete once scanning to the touch display panel by at least one scanning stage;The working mode of the touch display chip includes single mode and N cascade mode;Wherein, when N=1, the working mode of the touch display chip is single mode;When N>1, the working mode of the touch display chip is N cascade mode, and the N touch display chips are cascaded.

[0005] In a possible implementation, the touch display chip comprises a function selection module; the function selection module comprises an external function selection interface; the function selection module is configured to determine the working mode of the touch display chip according to the input level of the external function selection interface when the touch display chip is powered on.

[0006] In a possible implementation, when N>1, the N touch display chips comprise one master chip and N-1 slave chips; the function selection module further comprises an external position selection interface; the function selection module is further configured to determine whether the touch display chip is a master chip or a slave chip and the position of the touch display chip in the N touch display chips in series according to the input level of the external position selection interface when it is determined that the working mode of the touch display chip is the N-chip cascade mode.

[0007] In a possible implementation, the touch display chip further comprises a main processor, a coprocessor, a scanning module, an analog-to-digital conversion module, a storage module, and an external communication module; the storage module is configured to store firmware information required by the main processor and the coprocessor to run; the firmware information comprises first control signal associated information; the first control signal associated information is used to indicate generation basis of a first control signal corresponding to each scanning stage and time information of each first control signal sent to the scanning module; the coprocessor is configured to generate the first control signal according to the first control signal associated information and send the first control signal to the scanning module; the scanning module is configured to, after receiving the corresponding first control signal and a display end signal corresponding to a previous display stage of the scanning stage in each scanning stage, scan a corresponding touch display area according to the first control signal to obtain first data corresponding to the scanning stage; the display end signal corresponding to the previous display stage is used to indicate that the previous display stage ends; the first data is an analog signal; the analog-to-digital conversion module is configured to perform analog-to-digital conversion processing on the first data corresponding to each scanning stage to obtain second data corresponding to the scanning stage; the storage module of a first touch display chip in the N touch display chips is further configured to store third data; the third data comprises second data obtained by each touch display chip in the N touch display chips in the at least one scanning stage; when N>1, the first touch display chip is the main chip; the main processor of the first touch display chip is configured to obtain the third data from the storage module of the first touch display chip and process the third data to obtain fourth data; the fourth data is used to describe a touch operation on the touch display panel; the storage module of the first touch display chip is further configured to store the fourth data; the external communication module of the first touch display chip is configured to obtain the fourth data from the storage module of the first touch display chip and send the fourth data to an external system, so that the external system identifies the touch operation and responds to the touch operation.

[0008] In a possible implementation, the touch display chip further comprises a cascade communication module; the cascade communication module comprises a first cascade communication module and a second cascade communication module; when N>1, the first cascade communication module of a kth touch display chip in the N touch display chips is connected with the second cascade communication module of a (k-1) th touch display chip; 2≤k≤N.

[0009] In a possible implementation, the first cascade communication module of the kth touch display chip and the second cascade communication module of the k-1th touch display chip communicate through one or more of a serial peripheral interface (SPI), an integrated circuit bus (IIC), and a universal asynchronous receiver-transmitter (UART).

[0010] In a possible implementation, when N>1, the storage module of the slave chip is configured to store the second data obtained by the slave chip in the at least one scanning stage; the firmware information further includes second control signal generation information; the second control signal generation information is configured to instruct the coprocessor of the master chip to generate a second control signal after completing one scanning of the touch display panel; the coprocessor of the master chip is further configured to generate the second control signal according to the second control signal generation information and send the second control signal to the cascade communication module of the master chip; the cascade communication module of the master chip is configured to transmit the second control signal to the cascade communication module of the slave chip connected thereto; the cascade communication module of the slave chip is configured to transmit the received second control signal to the cascade communication module of the slave chip connected thereto, until the cascade communication modules of the N-1 slave chips all receive the second control signal; the cascade communication module of the slave chip is further configured to, after receiving the second control signal, transmit the second data obtained in the at least one scanning stage and stored in the storage module of the slave chip to the cascade communication module of the master chip; when the cascade communication module of the slave chip is not directly connected to the cascade communication module of the master chip, the second data obtained in the at least one scanning stage and stored in the storage module of the slave chip is transmitted to the cascade communication module of the master chip through the cascade communication module of another slave chip connected between the slave chip and the master chip; the cascade communication module of the master chip is further configured to receive the second data from the slave chip and store the second data in the storage module of the master chip.

[0011] In a possible implementation, the scanning module comprises a*M analog front ends and a*b*M touch sensing receiving ends; each of the analog front ends is connected with b touch sensing receiving ends; a, b and M are positive integers; b is greater than or equal to 2; the touch display panel comprises X touch sensors; X is less than or equal to a*b*M*N; each of the touch sensors is connected with one of the touch sensing receiving ends; the touch sensor is configured to generate an electric signal according to the touch operation; the analog front end is configured to, in each scanning stage, scan the touch sensor corresponding to the scanning stage through the connected touch sensing receiving end in a time division multiplexing manner, to obtain the electric signal generated by the touch sensor corresponding to the scanning stage and convert the electric signal into an analog voltage signal; the first data corresponding to each scanning stage comprises the analog voltage signal obtained by converting the electric signal generated by the touch sensor corresponding to the scanning stage.

[0012] In a possible implementation, the analog-to-digital conversion module comprises M analog-to-digital converters; each of the analog-to-digital converters is connected with a analog front end; the analog-to-digital converter is configured to, in each scanning stage, convert the analog voltage signal generated by the analog front end connected with the analog-to-digital converter into a digital voltage signal.

[0013] In a possible implementation, the touch display chip further comprises a display driving module; the display driving module is configured to generate a display driving signal according to the display data sent by the external system to drive the corresponding touch display area to display in each display stage, and send a display end signal corresponding to each display stage to the scanning module after each display stage ends.

[0014] According to another embodiment of the present application, a chip is provided, which is a touch display chip of the touch display device.

[0015] According to another embodiment of the present application, an electronic device is provided, which comprises the touch display device.

[0016] The touch display device provided by the present application can drive a touch display panel with a small size by using one touch display chip, and can drive a touch display panel with an enlarged size by using multiple cascaded touch display chips, so that the size of the touch display panel that can be driven can be expanded, the area of touch and display can be enlarged, and the information display efficiency can be improved, without the need of additional physical buttons to realize the function of touch human-computer interaction.

[0017] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0019] Figure 1 A structure schematic diagram of a touch display device according to an embodiment of the present application is shown.

[0020] Figure 2 A schematic diagram of a scanning module of a touch display chip 110 scanning a corresponding touch display area according to an embodiment of the present application is shown.

[0021] Figure 3 A structure schematic diagram of a touch display chip 110 according to an embodiment of the present application is shown.

[0022] Figure 4 A schematic diagram of a touch display device including two touch display chips 110 in cascade and three touch display chips 110 in cascade according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the drawings represent elements or components having the same function or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model.

[0027] The term "and / or" herein is merely a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously and B exists alone.Thus, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, at least one of A, B and C can mean any one or more elements selected from the set consisting of A, B and C.

[0028] Figure 1 A structure diagram of a touch display device according to an embodiment of the utility model is shown, as shown in the figure, the device can include N touch display chips 110 (i.e. Figure 1 Figure 1 The chip 1-chip N in) and touch display panel 120;N is positive integer;Each touch display chip 110 is connected with touch display panel 120.Touch display panel 120 includes N touch display areas (i.e. Figure 1 The chip 1-chip N in) and touch display panel 120;N is positive integer;Each touch display chip 110 is connected with touch display panel 120.Touch display panel 120 includes N touch display areas (i.e. Figure 1

[0029] N touch display chips 110 are used to drive the respective corresponding touch display areas to display in the display stage, and scan the respective corresponding touch display areas in the scanning stage;The display stage and scanning stage are alternately carried out.

[0030] The N touch display chips 110 can drive the touch display panel 120 to display a frame to be displayed through at least one display stage, and complete scanning of the touch display panel 120 once through at least one scanning stage. The working mode of the touch display chip 110 in the display stage and the scanning stage can be set by a person skilled in the art according to actual needs. For example, the N touch display chips 110 can drive the touch display panel 120 to display a frame to be displayed through one display stage, or drive the touch display panel 120 to display part of data of a frame to be displayed through one display stage, and drive the touch display panel 120 to display complete data of a frame to be displayed through multiple display stages; the N touch display chips 110 can complete scanning of the touch display panel 120 once through one scanning stage, or scan part of the touch display panel 120 through one scanning stage, and complete scanning of the touch display panel 120 once through multiple scanning stages.

[0031] The working mode of the touch display chip 110 includes a single-chip mode and an N-chip cascade mode; when N = 1, the working mode of the touch display chip 110 is the single-chip mode, one touch display chip 110 works independently, and drives the touch display panel 120 to realize display and touch functions; when N > 1, the working mode of the touch display chip 110 is the N-chip cascade mode, the N touch display chips 110 work in cascade, and respectively drive respective corresponding touch display regions to enable the touch display panel 120 to realize display and touch functions.

[0032] Exemplarily, the touch display panel 120 can be a liquid crystal display panel.

[0033] Exemplarily, the touch display chip 110 can be a vehicle-mounted TDDI chip, the touch display panel 120 can be a vehicle-mounted central control panel, and the touch display device can be connected with a vehicle system to realize a vehicle-mounted man-machine interaction function.

[0034] The touch display device in the embodiment of the utility model can drive one touch display chip when the size of the touch display panel to be driven is small, and can drive multiple touch display chips in cascade when the size of the touch display panel needs to be expanded, so that the physical size of the touch display panel can be expanded, the area of touch and display can be enlarged, the information display efficiency can be improved, physical buttons do not need to be additionally added to realize the function of touch man-machine interaction, and the problem that the size of the touch display panel is limited and the experience of man-machine interaction function is poor when a single chip is driven traditionally can be solved.

[0035] The utility model mainly introduces the process that touch display chip 110 drives touch display panel 120 to realize touch function.

[0036] In a possible implementation, the touch display chip 110 comprises a function selection module. The function selection module can be composed of external input / output (I / O) interfaces and internal logic. Since each touch display chip 110 has the function of single working or cascaded working, the working mode of the chip and the position of the chip in the cascaded system can be informed to the chip hardware by the level state of the external I / O interfaces when the chip is powered on.

[0037] For example, the function selection module can comprise external function selection interfaces; and the function selection module is configured to determine the working mode of the touch display chip 110 according to the input level of the external function selection interfaces when the touch display chip 110 is powered on.

[0038] When designing the touch display device, the technician can determine the number N of touch display chips 110 required to drive the touch display panel 120 according to the size of the touch display panel 120 to be driven and the driving capability of the touch display chip 110, so as to determine the working mode of the touch display chip 110. The technician can set the input level of the external function selection interfaces of the touch display chip 110 according to the working mode of the touch display chip 110. When the chip is powered on, the touch display chip 110 can determine its working mode according to the input level of the external function selection interfaces.

[0039] For example, the function selection module can comprise two external function selection interfaces, CascadeEn1 and CascadeEn0, and the working mode of the touch display chip 110 can be determined by the input level combination {CascadeEn1, CascadeEn0} of CascadeEn1 and CascadeEn0 when the chip is powered on. If {CascadeEn1, CascadeEn0} = 00 (i.e., the input level of CascadeEn1 is low and the input level of CascadeEn0 is low), it indicates that the working mode of the touch display chip 110 is single mode; if {CascadeEn1, CascadeEn0} = 01 (i.e., the input level of CascadeEn1 is low and the input level of CascadeEn0 is high), it indicates that the working mode of the touch display chip 110 is two-chip cascaded mode; if {CascadeEn1, CascadeEn0} = 10 (i.e., the input level of CascadeEn1 is high and the input level of CascadeEn0 is low), it indicates that the working mode of the touch display chip 110 is three-chip cascaded mode.

[0040] Exemplarily, when N>1, the N touch display chips include one master chip and N-1 slave chips; the function selection module can further include an external position selection interface; the function selection module is further configured to determine, in a case that the working mode of the touch display chip 110 is the N-cascaded mode, whether the touch display chip 110 is the master chip or the slave chip according to the input level of the external position selection interface, and determine the position of the touch display chip 110 in the N-cascaded touch display chips.

[0041] Exemplarily, when N≥3, the master chip can be located at the middle position of the N-cascaded touch display chips. For example, when N=3, the master chip can be located at the middle, and the two slave chips are located at the left and right sides of the master chip respectively.

[0042] In the design of the touch display device, if it is determined that N (N>1) touch display chips 110 are needed to be cascaded to drive the touch display panel 120, the technician can determine the master chip and the slave chip in the N touch display chips 110 and the position of each touch display chip 110 in the cascaded system, and set the input level of the external position selection interface of each touch display chip 110 accordingly. When the chip is powered on, if the touch display chip 110 determines that it works in the N-cascaded mode according to the input level of the external function selection interface, the touch display chip 110 can determine whether it is the master chip or the slave chip and its position in the cascaded system according to the input level of the external position selection interface; if the touch display chip 110 determines that it works in the single-chip mode according to the input level of the external function selection interface, the touch display chip 110 can not confirm the input level of the external position selection interface.

[0043] As an example, the function selection module can include two external position selection interfaces, LR1 and LR0. When the touch display chip 110 works in the N-cascaded mode, the input level combination {LR1, LR0} of LR1 and LR0 can inform the touch display chip 110 whether it is the master chip or the slave chip and its position in the cascaded system. If {LR1, LR0} of the touch display chip 110 is 11 (i.e. the input level of LR1 is high and the input level of LR0 is high), it indicates that the touch display chip 110 is the master chip; if {LR1, LR0} of the touch display chip 110 is 10 (i.e. the input level of LR1 is high and the input level of LR0 is low), it indicates that the touch display chip 110 is the slave chip adjacent to the master chip on the left side of the master chip; if {LR1, LR0} of the touch display chip 110 is 01 (i.e. the input level of LR1 is low and the input level of LR0 is high), it indicates that the touch display chip 110 is the slave chip adjacent to the master chip on the right side of the master chip.

[0044] Exemplarily, the external function selection interface and the external position selection interface can be a Strapping I / O interface. The Strapping I / O interface is a special I / O interface used to provide initial configuration parameters when the chip is powered on or reset.

[0045] In a possible implementation, the touch display chip 110 further includes a cascaded communication module; the cascaded communication module includes a first cascaded communication module and a second cascaded communication module; when N (N>1) touch display chips 110 are cascaded to work, the first cascaded communication module of the kth touch display chip is connected with the second cascaded communication module of the (k-1)th touch display chip; 2≤k≤N.

[0046] Exemplarily, the first cascaded communication module of the kth touch display chip and the second cascaded communication module of the (k-1)th touch display chip in the N touch display chips 110 can communicate through one or more of a serial peripheral interface (SPI), an inter-integrated circuit (IIC), and a universal asynchronous receiver / transmitter (UART).

[0047] In a possible implementation, the touch display chip 110 further includes a main processor, a coprocessor, a scanning module, an analog-to-digital conversion module, a storage module, and an external communication module.

[0048] The storage module is used to store firmware information required for the main processor and the coprocessor to run.

[0049] As an example, the firmware information can be pre-stored on a flash memory, and when N = 1, the firmware information can be loaded into the storage module of the chip when the chip is powered on; when N > 1, the firmware information can be loaded into the storage module of the master chip when the master chip is powered on, and the coprocessor of the master chip can control the cascade communication module of the master chip to transmit the firmware information in the storage module of the master chip to the cascade communication module of the slave chip connected to the master chip. After the cascade communication module of the slave chip receives the firmware information, the firmware information is stored in the storage module of the slave chip and transmitted to the cascade communication module of other slave chips connected thereto, until N-1 slave chips all receive the firmware information and store it in the storage module of each slave chip. As another example, when N = 1, the external system can send the firmware information to the chip through the external communication module of the chip, and the chip stores the firmware information in the storage module; when N > 1, the external system can send the firmware information to the master chip through the external communication module of the master chip, and the master chip can transmit the firmware information to the slave chip. In this way, when N > 1, the storage modules of the master chip and the slave chip all store the same firmware information.

[0050] Exemplarily, the storage module can be implemented using a static random access memory (SRAM).

[0051] Exemplarily, the firmware information can include first control signal associated information; the first control signal associated information is used to indicate the generation basis of the first control signal corresponding to each scanning stage and the time information of the first control signal corresponding to each scanning stage being sent to the scanning module.

[0052] The coprocessor is used to generate the first control signal according to the first control signal associated information and send the first control signal to the scanning module to control the scanning module to perform scanning according to the set scanning configuration (including scanning timing, scanning mode, etc.). When N > 1, since the storage modules of the master chip and the slave chip store the same firmware information, the first control signals generated by the coprocessors of the master chip and the slave chip can control the scanning modules of the master chip and the slave chip to perform scanning synchronously according to the same scanning configuration.

[0053] Exemplarily, the coprocessor can be a microcontroller unit (MCU).

[0054] The scanning module is used to, after receiving the corresponding first control signal and the display end signal of the previous display stage corresponding to each scanning stage, scan the corresponding touch display area according to the first control signal to obtain the first data corresponding to the scanning stage; wherein the display end signal of the previous display stage is used to indicate the end of the previous display stage; and the first data is an analog signal.

[0055] Exemplarily, the scanning module can include a*M analog front ends (AFEs) and a*b*M touch sensing receivers (RXs); each of the AFEs is connected with b RXs respectively; a, b, and M are positive integers; b≥2; the touch display panel 120 can include X touch sensors (sensors); X≤a*b*M*N; each of the sensors is connected with one RX respectively; the sensors are configured to sense a touch operation of a user on the touch display panel 120 and generate an electrical signal (for example, a capacitance signal) according to the touch operation; the AFEs are configured to, in each scanning stage, scan the sensor corresponding to the scanning stage by the connected RXs in a time-division multiplexing manner, to obtain the electrical signal generated by the sensor corresponding to the scanning stage and convert the electrical signal into an analog voltage signal; the first data corresponding to each scanning stage includes the analog voltage signal obtained by converting the electrical signal generated by the sensor corresponding to the scanning stage.

[0056] As an example, the scanning module of the touch display chip 110 can include 120 AFEs, and each of the AFEs can be connected with 4 RXs, that is, the scanning module of the touch display chip 110 includes 120*4=480 RXs, and the touch display chip 110 can support a maximum of scanning a touch display area including 480 sensors. If the number of sensors included in the touch display panel 120 to be driven is not greater than 480, one touch display chip 110 can drive the touch display panel 120; if the number of sensors included in the touch display panel 120 to be driven is greater than 480 but not greater than 960, two touch display chips 110 are needed to drive the touch display panel 120 in cascade; in this way, according to the number of RXs included in the scanning module of one touch display chip 110 and the number of sensors included in the touch display panel 120 to be driven, the number N of touch display chips 110 needed to drive the touch display panel 120 can be determined.

[0057] Figure 2Fig. 1 shows a schematic diagram of a touch display chip 110 according to an embodiment of the present application. The touch display chip 110 includes a scanning module and a touch display area. The scanning module includes 240 AFEs, of which 120 AFEs (L_AFE1~L_AFE120) are designed on the left side of the touch display chip 110, and the other 120 AFEs (R_AFE1~R_AFE120) are designed on the right side of the touch display chip 110. Each AFE is connected to 4 RXs, i.e., the scanning module includes 960 RXs (RX1~RX960). In the first scan, the sensors connected to RX1~RX120 and RX841~RX960 are scanned simultaneously; in the second scan, the sensors connected to RX121~RX240 and RX721~RX840 are scanned simultaneously; in the third scan, the sensors connected to RX241~RX360 and RX601~RX720 are scanned simultaneously; and in the fourth scan, the sensors connected to RX361~RX480 and RX481~RX600 are scanned simultaneously. Thus, each scan can support a maximum of 240 sensors to be scanned simultaneously, and four scans can scan the touch display area including a maximum of 960 sensors. Figure 2 The connection relationship between the AFEs and the RXs, the connection relationship between the RXs and the sensors, and the RXs in each scan (i.e., the sensors corresponding to each scan stage) can be set by those skilled in the art, and the present application does not limit them as long as the requirements are met. Compared with the design of one AFE connected to one RX in the prior art, one AFE in the touch display chip of the present embodiment can be connected to multiple RXs, and scanning is performed through time division multiplexing, which can reduce the number of AFEs in the chip and save chip area.

[0058] Exemplarily, in order to support different panel sensor mapping, a "block scanning" manner can be adopted, i.e., each time, sensors in a certain region of the touch display panel are scanned. Since the shapes of the in-vehicle center control panel are various, the number and distribution of the sensors in the panel are also different. The "block scanning" manner can support more various sensor distributions, so that more shapes of the panel can be scanned, and the "block scanning" manner can be applied to various irregularly shaped panels.

[0059] The analog-to-digital conversion module is configured to perform analog-to-digital conversion on the first data corresponding to each scanning stage to obtain second data corresponding to the scanning stage.

[0060] Exemplarily, the analog-to-digital conversion module can include M analog-to-digital converters (ADCs); each ADC is connected with a number of AFES, and the number of AFES connected with each ADC is a; and the ADC is configured to convert the analog voltage signals generated by the AFES connected therewith into digital voltage signals in each scanning stage.

[0061] Exemplarily, a can be greater than or equal to 2.

[0062] As an example, one ADC can be connected with 10 AFES. Assuming that 4 scans (i.e., 4 scanning stages) are needed to complete one scan of the touch display panel 120, in each scanning stage, the AFES scan the sensors corresponding to the scanning stage through the connected RX, the data (analog voltage signals) scanned by the 10 AFES connected with one ADC are sent into the ADC, and the data scanned by each AFE is quantized (i.e., analog-to-digital conversion) in the ADC in turn. After the ADC quantizes 10 times, the analog voltage signals scanned by the 10 AFES are converted into digital signals; after the first data scanned in the 4 scanning stages are all converted into second data, one scan of the touch display panel 120 is completed. In the touch display chip of the embodiment of the present application, a plurality of AFES can be connected with one ADC, compared with the design of one AFE connected with one ADC in the prior art, the number of ADCs in the chip can be reduced, thereby saving the chip area.

[0063] It should be noted that the ADC needs to complete the quantization of the data obtained in the present scan before the next scan (i.e. the scanning module needs to complete the scanning of the sensor corresponding to the scanning stage and the analog-to-digital conversion module needs to convert the first data obtained by scanning the sensor into the second data in one scanning stage), and if the value of a is too large (i.e. too many AFEs are connected to one ADC), the quantization time required by the ADC will be too long, thereby causing the time required for one scanning stage to be too long. Those skilled in the art can set the value of a according to actual needs.

[0064] The storage module of the first touch display chip in the N touch display chips 110 is also configured to store third data; the third data includes the second data obtained by each touch display chip in the N touch display chips 110 in the at least one scanning stage (i.e. the second data obtained after completing the scanning of the touch display panel 120 once); when N = 1, the first touch chip is one touch display chip 110 included in the touch display device, and the third data includes the second data obtained by the touch display chip 110 after completing the scanning of the touch display panel 120 once; when N > 1, the first touch display chip is a master chip in the N touch display chips 110 included in the touch display device, and the third data includes the second data obtained by the master chip after completing the scanning of the corresponding touch display area and the second data obtained by each slave chip after completing the scanning of the corresponding touch display area.

[0065] Exemplarily, when N>1, the slave chip uses the storage module of the chip to store the second data obtained by the slave chip in the at least one scanning stage (i.e. the second data obtained by the slave chip after scanning the corresponding touch display area); the firmware information can further include second control signal generation information; the second control signal generation information is used to instruct the coprocessor of the master chip to generate a second control signal after completing a scan of the touch display panel once; the coprocessor of the master chip is further used to generate the second control signal according to the second control signal generation information and send the second control signal to the cascade communication module of the master chip; the cascade communication module of the master chip is used to transmit the second control signal to the cascade communication module of the slave chip connected thereto; the cascade communication module of the slave chip is used to transmit the received second control signal to the cascade communication module of the slave chip connected thereto until the cascade communication modules of N-1 slave chips all receive the second control signal; the cascade communication module of the slave chip is further used to transmit the second data obtained after scanning the corresponding touch display area and stored in the storage module of the slave chip to the cascade communication module of the master chip after receiving the second control signal; wherein, in the case that the cascade communication module of the slave chip is not directly connected to the cascade communication module of the master chip, the second data obtained after scanning the corresponding touch display area and stored in the storage module of the slave chip is transmitted to the cascade communication module of the master chip through the cascade communication module of another slave chip connected between the slave chip and the master chip; the cascade communication module of the master chip is further used to receive the second data from the slave chip and store it to the storage module of the master chip. In this way, the storage module of the master chip stores the second data obtained after completing a scan of the entire touch display panel once.

[0066] As an example, if N=3, the first cascade communication module of the master chip is connected to the second cascade communication module of the slave chip 1, and the second cascade communication module of the master chip is connected to the first cascade communication module of the slave chip 2; after completing a scan of the touch display panel 120 once, the coprocessor of the master chip generates a second control signal; the first cascade communication module of the master chip can transmit the second control signal to the second cascade communication module of the slave chip 1, and the second cascade communication module of the slave chip 1 can transmit the second data obtained in the scanning process and stored in the storage module of the slave chip 1 to the first cascade communication module of the master chip after receiving the second control signal; the second cascade communication module of the master chip can transmit the second control signal to the first cascade communication module of the slave chip 2, and the first cascade communication module of the slave chip 2 can transmit the second data obtained in the scanning process and stored in the storage module of the slave chip 2 to the second cascade communication module of the master chip after receiving the second control signal; the first and second cascade communication modules of the master chip can store the respective received data to the storage module of the master chip.

[0067] As another example, if N=5, the first cascaded communication module of the master chip is connected with the second cascaded communication module of the slave chip 1, the second cascaded communication module of the master chip is connected with the first cascaded communication module of the slave chip 2, the first cascaded communication module of the slave chip 1 is connected with the second cascaded communication module of the slave chip 3, and the second cascaded communication module of the slave chip 2 is connected with the first cascaded communication module of the slave chip 4; after completing the scanning of the touch display panel 120 once, the coprocessor of the master chip generates a second control signal; the first cascaded communication module of the master chip can transmit the second control signal to the second cascaded communication module of the slave chip 1, the first cascaded communication module of the slave chip 1 can transmit the second control signal to the second cascaded communication module of the slave chip 3, the second cascaded communication module of the slave chip 3 can transmit the second data stored in the storage module of the slave chip 3 obtained in the scanning process to the first cascaded communication module of the slave chip 1 after receiving the second control signal, the first cascaded communication module of the slave chip 1 can store the second data from the slave chip 3 to the storage module of the slave chip 1, and the second cascaded communication module of the slave chip 1 can obtain the second data obtained by the slave chip 1 in the scanning process and the second data from the slave chip 3 from the storage module of the slave chip 1, and transmit these data to the first cascaded communication module of the master chip; the second cascaded communication module of the master chip can transmit the second control signal to the first cascaded communication module of the slave chip 2, the second cascaded communication module of the slave chip 2 can transmit the second control signal to the first cascaded communication module of the slave chip 4, the first cascaded communication module of the slave chip 4 can transmit the second data stored in the storage module of the slave chip 4 obtained in the scanning process to the second cascaded communication module of the slave chip 2 after receiving the second control signal, the second cascaded communication module of the slave chip 2 can store the second data from the slave chip 4 to the storage module of the slave chip 2, and the first cascaded communication module of the slave chip 2 can obtain the second data obtained by the slave chip 2 in the scanning process and the second data from the slave chip 4 from the storage module of the slave chip 2, and transmit these data to the second cascaded communication module of the master chip; the first and second cascaded communication modules of the master chip can store the data received by themselves to the storage module of the master chip.

[0068] The master processor of the first touch display chip is configured to obtain third data from the storage module of the first touch display chip and process the third data to obtain fourth data; the fourth data is used to describe a touch operation on the touch display panel 120.

[0069] Exemplarily, the master processor can be an MCU.

[0070] Exemplarily, the fourth data can include a touch point position coordinate on the touch display panel 120.

[0071] The storage module of the first touch display chip is further configured to store the fourth data.

[0072] The external communication module of the first touch display chip is configured to obtain fourth data from the storage module of the first touch display chip and send the fourth data to an external system, so that the external system identifies a touch operation on the touch display panel 120 and responds to the touch operation.

[0073] As an example, the external system is a car machine system, and the fourth data includes touch point position coordinates. After the car machine system receives the touch point position coordinates from the external communication module, the car machine system identifies that the touch operation on the touch display panel 120 is clicking the vehicle-mounted air conditioner start button on the touch display panel 120 according to the touch point position coordinates, and then the car machine system can start the vehicle-mounted air conditioner in response to the touch operation.

[0074] In a possible implementation, the touch display chip 110 further includes a display driving module configured to generate a display driving signal according to display data sent by an external system to drive a corresponding touch display area to display at each display stage, and send a display end signal corresponding to the display stage to the scanning module after each display stage ends.

[0075] The external system (for example, the car machine system) can send display data to the display driving module of the touch display chip 110. The display driving module can generate a display driving signal according to the display data to drive the touch display panel 120 to display a to-be-displayed picture. When N>1, the external system can send the display data to the display driving modules of the N touch display chips 110 in cascade at the same time. The display driving modules of the N touch display chips 110 can receive the display data at the same time and generate display driving signals to drive corresponding touch display areas to display at each display stage, and send a display end signal after each display stage is completed. The scanning module can scan the corresponding touch display area according to the scanning configuration after receiving the display end signal sent by the display driving module and the first control signal sent by the coprocessor. In this way, the scanning can be avoided before the display is completed, and the incomplete display can be avoided, thereby improving the user experience.

[0076] Exemplarily, the touch display chip 110 can further include a clock synchronization module, and the clock synchronization module can include a crystal oscillator and a phase-locked loop. When N>1, the phase-locked loop in the master chip can lock the clock frequency provided by the crystal oscillator at a fixed frequency and transmit the fixed frequency to the slave chip, so that the master chip and the slave chip are clock-synchronized.

[0077] Exemplarily, without the need of the touch display device working, the external system can send a sleep instruction to the touch display chip 110 to make the touch display chip 110 enter the sleep state from the normal working state to reduce the power consumption. When N = 1, the external system sends the sleep instruction to the touch display chip 110 through the external communication module of the touch display chip 110, and the main processor of the touch display chip 110 informs the coprocessor to execute the sleep instruction; when N > 1, the external system sends the sleep instruction to the main chip through the external communication module of the main chip, the main processor of the main chip informs the coprocessor to execute the sleep instruction and informs the slave chip, and the coprocessor of the main chip controls the cascade communication module of the main chip to transmit the sleep instruction or the sleep state of the main chip to the cascade communication module of the slave chip, so that the slave chip enters the sleep state.

[0078] Figure 3 A structure diagram of the touch display chip 110 according to an embodiment of the present application is shown, as shown in the figure, the touch display chip 110 can include a main processor (i.e. MCU1), a coprocessor (i.e. MCU2), a scanning module, an analog-to-digital conversion module, a storage module, an external communication module (i.e. COM1), a first cascade communication module (i.e. COM2_1), a second cascade communication module (i.e. COM2_2) and a function selection module. Figure 3

[0079] The MCU1 can run a certain algorithm to calculate the touch point position coordinates on the touch display panel 120 according to the raw data and the difference data obtained by touch scanning.

[0080] The MCU2 can control the scanning module, including but not limited to configuring the corresponding register to configure the scanning timing, generating a suitable first control signal to control the scanning module to scan according to the scanning configuration, and can control COM2_1 and COM2_2 to communicate between the main chip and the slave chip. The MCU1 can control the MCU2, and the MCU2 can send an interrupt to the MCU1 to inform the MCU1 that the task is completed after completing a certain task, so that the MCU1 performs subsequent processing.

[0081] The scanning module includes a plurality of AFEs, the scanning module can send a driving signal to the touch display panel 120 to make the sensor on the touch display panel 120 generate an electric signal in response to a touch operation, and the AFE scans the sensor through the connected RX, collects the electric signal generated by the sensor and converts it into an analog voltage signal. The scanning module can send a signal to the MCU2 to inform the MCU2 that the scanning is completed after the scanning is completed, so that the MCU2 performs subsequent processing.

[0082] ​The analog-digital conversion module includes a plurality of ADCs, which can convert the analog voltage signal generated by the scanning module into a digital voltage signal for processing by the MCU 1. When N > 1, the slave chip MCU 2 can send a scanning completion signal to the master chip through COM2_1 or COM2_2 after scanning the corresponding touch display area of the slave chip. After the master chip COM2_1 or COM2_2 receives the scanning completion signal, it is given to the MCU 2 of the master chip. The MCU 2 of the master chip sends a scanning data transmission instruction (i.e., a second control signal) to the COM2_1 or COM2_2 of the slave chip through COM2_1 or COM2_2. After the COM2_1 or COM2_2 of the slave chip receives the scanning data transmission instruction, it obtains the scanning data from the storage module of the slave chip and transmits it to the master chip. The MCU 1 of the master chip processes all the scanning data obtained by the master chip and the slave chip to obtain the touch point position coordinates.

[0083] The storage module can store firmware information, scanning data, touch point position coordinates calculated by the MCU 1, and the like required for the operation of the MCU 1 and the MCU 2.

[0084] The COM1 can realize communication between the touch display chip 110 and an external system. The COM1 can obtain the touch point position coordinates from the storage module under the control of the MCU 1 and notify the external system (such as a car system) of the coordinate information. The COM1 and the external system can communicate through one or more of IIC, SPI, and the like, but not limited thereto. The COM1 can send an interrupt to the MCU 1 after completing a task to inform the MCU 1 that the task is completed so that the MCU 1 can perform subsequent processing.

[0085] The COM2_1 and COM2_2 are used to connect with other touch display chips 110 in the cascade system. When a plurality of touch display chips 110 are cascaded to work, the COM2_1 and COM2_2 can realize communication, state switching (normal working state to sleep state), state query, and the like between the master chip and the slave chip under the control of the MCU 2. The communication interface includes one or more of UART, IIC, SPI, and the like, but not limited thereto. Different communication interfaces can be used to realize different functions. For example, the data transmission between the master chip and the slave chip can be realized through SPI; when the master chip receives a sleep instruction to switch to a sleep state, the sleep instruction or the sleep state of the master chip can be transmitted to the slave chip through IIC; the communication between the MCU 1 of the master chip and the MCU 1 of the slave chip can be realized through UART. The SPI and IIC can be controlled by the MCU 1 or the MCU 2. The technician can set some hardware transmission instructions (such as a scanning data transmission instruction) in advance. When the COM2_1 and COM2_2 receive the hardware transmission instruction, the communication between the hardware can be automatically realized and the corresponding data can be returned to the MCU 1 or the MCU 2.

[0086] The function selection module includes a Strapping I / O interface, the Strapping I / O interface is connected with an external level, through the input level state of the Strapping I / O interface when power on, the chip hardware can be informed of the working mode of the chip, and when the working mode of the chip is N-cascaded mode, the chip hardware can be informed of whether the chip is a master chip or a slave chip and the position of the chip in the cascaded system. When the working mode of the touch display chip 110 is single-chip mode, the function modules related to cascading in the touch display chip 110 can be selected to be closed or disabled to save power consumption; when the working mode of the touch display chip 110 is N-cascaded mode, the chip hardware can automatically enable or close the corresponding modules according to different cascaded chip numbers N.

[0087] Figure 4 Fig. 1 shows a schematic diagram of a touch display device including two cascaded touch display chips 110 and three cascaded touch display chips 110 according to an embodiment of the present application, wherein, Figure 4 Fig. 1(a) shows the connection relationship between the touch display chip 110 and the touch display panel 120 when the touch display device includes two cascaded touch display chips 110, Figure 4 Fig. 1(b) shows the connection relationship between the touch display chip 110 and the touch display panel 120 when the touch display device includes three cascaded touch display chips 110.

[0088] As shown in Fig. 1, Figure 4As shown in (a), COM2_1 of the master chip (i.e., Master) is connected with COM2_2 of the slave chip 1 (i.e., Slave1), and communication between COM2_1 of the Master and COM2_2 of the Slave1 can be performed through one or more of, but not limited to, SPI, IIC, UART. When designing the touch display device, the technician can connect the CascadeEn1 interface of the Master to ground, and connect the CascadeEn0 interface, the LR1 interface and the LR0 interface to the power supply voltage; connect the CascadeEn1 interface and the LR0 interface of the Slave1 to ground, and connect the CascadeEn0 interface and the LR1 interface to the power supply voltage. In this way, when the chip is powered on, the Master can determine that it works in two-cascade mode and is the master chip through {CascadeEn1, CascadeEn0} = 01 and {LR1, LR0} = 11; the Slave1 can determine that it works in two-cascade mode and is the slave chip located on the left side of the master chip through {CascadeEn1, CascadeEn0} = 01 and {LR1, LR0} = 10. COM2_2 of the Master and COM2_1 of the Slave1 can be automatically closed (i.e., not working). The touch display panel 120 includes a touch display area 1 and a touch display area 2, and RX connected to the AFE in the scan module of the Slave1 is used to scan the sensor in the touch display area 1, and RX connected to the AFE in the scan module of the Master is used to scan the sensor in the touch display area 2.

[0089] As Figure 4As shown in (b), COM2_1 of the Master is connected with COM2_2 of the Slave1, COM2_2 of the Master is connected with COM2_1 of the Slave2, and communication between COM2_1 of the Master and COM2_2 of the Slave1 and between COM2_2 of the Master and COM2_1 of the Slave2 can be performed through one or more of SPI, IIC, UART, but not limited thereto. In designing the touch display device, the technician can connect the CascadeEn1 interface, the LR1 interface and the LR0 interface of the Master to the power supply voltage, and connect the CascadeEn0 interface to the ground; connect the CascadeEn1 interface and the LR1 interface of the Slave1 to the power supply voltage, and connect the CascadeEn0 interface and the LR0 interface to the ground; connect the CascadeEn1 interface and the LR0 interface of the Slave2 to the power supply voltage, and connect the CascadeEn0 interface and the LR1 interface to the ground. In this way, when the chips are powered on, the Master can determine that it works in the three-cascade mode and is the master chip through {CascadeEn1, CascadeEn0} = 10 and {LR1, LR0} = 11; the Slave1 can determine that it works in the three-cascade mode and is the slave chip on the left side of the master chip through {CascadeEn1, CascadeEn0} = 10 and {LR1, LR0} = 10; and the Slave2 can determine that it works in the three-cascade mode and is the slave chip on the right side of the master chip through {CascadeEn1, CascadeEn0} = 10 and {LR1, LR0} = 01. COM2_1 of the Slave1 and COM2_2 of the Slave2 can be automatically closed. The touch display panel 120 includes a touch display area 1, a touch display area 2 and a touch display area 3, RX connected to the AFE in the scan module of the Slave1 is used to scan the sensor in the touch display area 1, RX connected to the AFE in the scan module of the Master is used to scan the sensor in the touch display area 2, and RX connected to the AFE in the scan module of the Slave2 is used to scan the sensor in the touch display area 3.

[0090] The embodiment of the utility model discloses a kind of touch display chip in touch function on the cascade architecture, by proposing the design scheme of two touch display chips cascade and three touch display chips cascade, the physical size of the touch display panel that can be driven is expanded, the efficiency of information display is improved, touch function is realized without through additional physical button, it is possible to make touch type control replace traditional physical button type control.

[0091] The touch display chip in the embodiment of the utility model can be a vehicle-mounted TDDI chip, the touch display panel can be a vehicle-mounted central control panel, and the external system can be a vehicle machine system. The touch display device provided in the embodiment of the utility model can be applied to the field of vehicle-mounted man-machine interaction, the size of the vehicle-mounted central control panel can be expanded, the information display efficiency of the vehicle-mounted central control panel can be improved, the function of touch man-machine interaction can be realized without additionally increasing physical buttons, the man-machine interaction experience of users is optimized, and the problems of limited panel size and poor man-machine interaction experience during driving of a traditional single chip are solved.

[0092] The utility model also proposes a kind of chip, the chip is the touch display chip 110 in the touch display device proposed in the utility model.

[0093] Exemplarily, the chip can be a vehicle-mounted TDDI chip.

[0094] The utility model also proposes an electronic equipment, and the electronic equipment includes the touch display device proposed in the utility model.

[0095] Exemplarily, the electronic equipment can be a vehicle-mounted device.

[0096] Herein the special word "exemplary" means "as an example, embodiment or illustration". Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0097] It should be explained that, in this paper, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the sentence "including a …" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0098] The above is only specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A touch display device, characterized in that, The touch display chip and the touch display panel; N is a positive integer; each touch display chip is connected with the touch display panel; the touch display panel includes N touch display areas; the N touch display chips and the N touch display areas correspond one by one; the N touch display chips are used for driving the corresponding touch display area to display in a display stage, and scanning the corresponding touch display area in a scanning stage; the display stage and the scanning stage are alternately performed; the N touch display chips drive the touch display panel to display one frame to be displayed through at least one display stage, and complete scanning of the touch display panel once through at least one scanning stage; The working mode of the touch display chip includes a single mode and an N-cascaded mode; when N=1, the working mode of the touch display chip is the single mode; when N>1, the working mode of the touch display chip is the N-cascaded mode, and the N touch display chips are cascaded.

2. The apparatus of claim 1, wherein, The touch display chip includes a function selection module; the function selection module includes an external function selection interface; the function selection module is used for determining the working mode of the touch display chip according to the input level of the external function selection interface when the touch display chip is powered on.

3. The apparatus of claim 2, wherein, When N>1, the N touch display chips include one master chip and N-1 slave chips; The function selection module further includes an external position selection interface; the function selection module is further used for determining whether the touch display chip is a master chip or a slave chip and determining the position of the touch display chip in the N cascaded touch display chips according to the input level of the external position selection interface when it is determined that the working mode of the touch display chip is the N-cascaded mode.

4. The apparatus of claim 3, wherein, The touch display chip further includes a main processor, a coprocessor, a scanning module, an analog-to-digital conversion module, a storage module and an external communication module; The storage module is used for storing firmware information required by the main processor and the coprocessor; the firmware information includes first control signal associated information; the first control signal associated information is used for indicating the generation basis of each scanning stage corresponding first control signal and the time information of each first control signal sent to the scanning module; The coprocessor is used for generating the first control signal according to the first control signal associated information and sending the first control signal to the scanning module; The scanning module is used for scanning the corresponding touch display area according to the first control signal after receiving the corresponding first control signal and the display end signal of the previous display stage corresponding to the scanning stage in each scanning stage, to obtain the first data corresponding to the scanning stage; the display end signal of the previous display stage is used for indicating the end of the previous display stage; the first data is an analog signal; The analog-to-digital conversion module is used for performing analog-to-digital conversion processing on the first data corresponding to each scanning stage to obtain the second data corresponding to the scanning stage; The storage module of the first touch display chip in the N touch display chips is further configured to store third data; the third data comprises second data obtained by each of the touch display chips in the N touch display chips in the at least one scanning stage; when N>1, the first touch display chip is the master chip; The main processor of the first touch display chip is configured to acquire the third data from the storage module of the first touch display chip and process the third data to obtain fourth data; the fourth data is used to describe a touch operation on the touch display panel; The storage module of the first touch display chip is further configured to store the fourth data; The external communication module of the first touch display chip is configured to acquire the fourth data from the storage module of the first touch display chip and send the fourth data to an external system, so that the external system identifies the touch operation and responds to the touch operation.

5. The apparatus of claim 4, wherein, The touch display chip further comprises a cascade communication module; the cascade communication module comprises a first cascade communication module and a second cascade communication module; When N>1, the first cascade communication module of the kth touch display chip in the N touch display chips is connected with the second cascade communication module of the k-1th touch display chip; 2≤k≤N.

6. The apparatus of claim 5, wherein, The first cascade communication module of the kth touch display chip and the second cascade communication module of the k-1th touch display chip communicate through one or more of a serial peripheral interface (SPI), an integrated circuit bus (IIC) and a universal asynchronous receiver-transmitter (UART).

7. The apparatus of claim 5 or 6, wherein, When N>1, The storage module of the slave chip is configured to store second data obtained by the slave chip in the at least one scanning stage; The firmware information further comprises second control signal generation information; the second control signal generation information is used to instruct the coprocessor of the master chip to generate a second control signal after completing a scanning of the touch display panel once; the coprocessor of the master chip is further configured to generate the second control signal according to the second control signal generation information and send the second control signal to the cascade communication module of the master chip; The cascade communication module of the master chip is configured to transmit the second control signal to the cascade communication module of the slave chip connected therewith; The cascade communication module of the slave chip is configured to transmit the received second control signal to the cascade communication module of the slave chip connected therewith, until the cascade communication modules of the N-1 slave chips all receive the second control signal; The slave chip's cascade communication module is further configured to, after receiving the second control signal, transmit the second data obtained in the at least one scan stage and stored in the slave chip's storage module to the master chip's cascade communication module; wherein, in the case that the slave chip's cascade communication module is not directly connected to the master chip's cascade communication module, the second data obtained in the at least one scan stage and stored in the slave chip's storage module is transmitted to the master chip's cascade communication module through the cascade communication module of another slave chip connected between the slave chip and the master chip. The master chip's cascade communication module is further configured to receive the second data from the slave chip and store the second data into the master chip's storage module.

8. The apparatus of claim 4, wherein, The scan module comprises a*M analog front ends and a*b*M touch sensing receiving ends; each of the analog front ends is connected to b touch sensing receiving ends; a, b, and M are positive integers; b is greater than or equal to 2; the touch display panel comprises X touch sensors; X is less than or equal to a*b*M*N; each of the touch sensors is connected to one of the touch sensing receiving ends. The touch sensor is configured to generate an electrical signal according to the touch operation. The analog front end is configured to, in each scan stage, scan the touch sensor corresponding to the scan stage through the connected touch sensing receiving end in a time-division multiplexing manner, to obtain the electrical signal generated by the touch sensor corresponding to the scan stage and convert the electrical signal into an analog voltage signal; the first data corresponding to each scan stage comprises the analog voltage signal obtained by converting the electrical signal generated by the touch sensor corresponding to the scan stage.

9. The apparatus of claim 8, wherein, The analog-to-digital conversion module comprises M analog-to-digital converters; each of the analog-to-digital converters is connected to a analog front end; the analog-to-digital converter is configured to, in each scan stage, convert the analog voltage signal generated by the connected analog front end into a digital voltage signal.

10. The apparatus of claim 5, wherein, The touch display chip further comprises a display driving module; the display driving module is configured to generate a display driving signal according to the display data sent by the external system to drive the corresponding touch display area to display in each display stage, and send a display end signal corresponding to each display stage to the scan module after each display stage ends.

11. A chip, characterized by The chip is a touch display chip of the touch display device of any one of claims 1-10.

12. An electronic device, comprising: The touch display device comprises the touch display device of any one of claims 1-10.

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