Noise canceling system and touch display device

Abstract

A noise canceling system is provided in the present disclosure. The noise canceling system comprises a plurality of signal receiving lines, a first touch display chip and a plurality of noise canceling circuits. The signal receiving lines are configured to receive a plurality of touch signals from a touch display panel, wherein the signal receiving lines are classified into a plurality of line groups according to a layout design. The noise canceling circuits are coupled to the line groups, and each of them is configured to generate a corresponding noise canceling signal based on the touch signals received by each line group. The first touch display chip is configured to receive the touch signals and the corresponding noise canceling signals of each line group to generate a plurality of adjusted touch signals. The number of the noise canceling circuits is greater than or equal to the number of the line groups.

Description

Technical Field

[0001] This disclosure relates to a technique for eliminating noise in a touch display device, and more particularly to a noise cancellation system and touch display device that eliminates noise by grouping signal receiving wires. Prior Technology

[0002] In recent years, with the widespread adoption of smart devices, more and more technological products have begun to use touchscreens for operation. For touchscreens, noise can cause them to misinterpret operations; if noise cannot be effectively eliminated, it will affect the touchscreen's performance. Therefore, noise processing capability is one of the indicators that determines the performance of a touchscreen. Summary of the Invention

[0003] This disclosure provides a noise cancellation system comprising a plurality of signal receiving wires, a plurality of noise cancellation circuits, and a touch display chip. The plurality of signal receiving wires are used to receive a plurality of touch signals from a touch display panel, wherein the signal receiving wires are classified into multiple wire groups according to a layout design. The plurality of noise cancellation circuits are coupled to the wire groups and are used to generate a corresponding noise cancellation signal based on the touch signals received by each wire group. The touch display chip receives the touch signals from each wire group and the corresponding noise cancellation signals to generate a plurality of adjustment touch signals. The number of noise cancellation circuits is greater than or equal to the number of wire groups.

[0004] This disclosure provides a touch display device, comprising a touch display panel, a plurality of signal receiving wires, a plurality of noise cancellation circuits, and a touch display chip. The touch display panel includes a plurality of touch units and a plurality of display units, wherein the touch units have a touch state and the display units are used to generate a display image based on a display signal. The plurality of signal receiving wires are used to receive a plurality of touch signals from the touch display panel, wherein the signal receiving wires are classified into multiple wire groups according to a layout design. The plurality of noise cancellation circuits are coupled to the wire groups and are used to generate a corresponding noise cancellation signal based on the touch signals received by each wire group. The touch display chip is used to receive the touch signals and corresponding noise cancellation signals from each wire group to generate a plurality of adjustment touch signals. The number of noise cancellation circuits is greater than or equal to the number of wire groups.

[0005] The noise cancellation system and touch display device disclosed herein can eliminate various noises to different degrees by classifying circuit components, thereby overcoming the influence of layout design on noise cancellation and improving noise cancellation performance. Simple Explanation of the Diagram

[0006] To make the above and other objects, features, advantages and embodiments of this disclosure more apparent and understandable, the accompanying drawings are described below: Figure 1 is a functional block diagram of a touch display device according to an embodiment of this disclosure; Figure 2A is a schematic diagram illustrating touch operation according to an embodiment of this disclosure; Figure 2B is a timing diagram illustrating the transmission signals according to an embodiment of this disclosure; Figure 3A is a schematic diagram of a noise cancellation system according to an embodiment of this disclosure; Figure 3B is a schematic diagram of a noise cancellation system according to an embodiment of this disclosure; Figure 3C is a schematic diagram of a noise cancellation system according to an embodiment of this disclosure; and Figure 3D is a schematic diagram of a noise cancellation system illustrated according to an embodiment of this disclosure. Implementation

[0007] For illustrative purposes, numerous specific details are set forth below to provide a full understanding of the embodiments of this disclosure. However, it will be apparent that one or more embodiments may be implemented without these specific details. In other instances, conventional structures and apparatuses are shown only schematically for the sake of simplicity. The embodiments of this disclosure will be described below in conjunction with the accompanying drawings. In the drawings, the same reference numerals denote the same or similar elements or method flows.

[0008] In this disclosure, when an element is referred to as a "connection," it may mean an "electrical connection" or a "signal connection," and when an element is referred to as a "coupled connection," it may mean an "electrical coupling" or a "signal coupling." "Connection" or "coupled connection" may also be used to indicate the operation or interaction between two or more elements. Unless otherwise specified in the text, "a" and "the" may refer to one or more in general. It will be further understood that the terms "comprising," "including," "having," and similar terms as used herein specify the features, regions, integers, steps, operations, elements, and / or components described herein, but do not exclude one or more other features, regions, integers, steps, operations, elements, components, and / or groups thereof described or additionally.

[0009] Figure 1 is a functional block diagram of a touch display device 100 according to an embodiment of this disclosure. In some embodiments, the touch display device 100 includes a touch display panel 110, a touch display chip 120, noise cancellation circuits 130A and 130B, signal receiving lines R1-R6, and signal transmission lines T1-T4. In some embodiments, the combination of the touch display chip 120, the noise cancellation circuits 130A and 130B, the signal receiving lines R1-R6, and the signal transmission lines T1-T4 may also be referred to as a "noise cancellation system," which is used to reduce the signal strength of noise on the touch display panel 110.

[0010] The touch display panel 110 includes a plurality of touch units and a plurality of display units (not shown). In some embodiments, the touch units of the touch display panel 110 are coupled to signal receiving wires R1 to R6 to receive touch operations (e.g., through physical objects such as fingers or styluses), so that the signal receiving wires R1 to R6 receive the corresponding touch signals.

[0011] In some embodiments, the touch unit may be implemented by a capacitor, a resistor, other electronic components that change parameters according to a touch operation, or any combination thereof. For example, the touch unit may include a capacitor, so that when the touch unit receives a touch operation, the capacitance value of the capacitor changes, thereby causing the signal receiving wires R1 to R6 to receive the corresponding touch signal.

[0012] In some embodiments, the display unit of the touch display panel 110 is coupled to the touch display chip 120 to generate a corresponding display screen according to the display signal DIS. Those skilled in the art to which this disclosure pertains should understand the technical content of the display unit generating a display screen according to the display signal; for the sake of brevity, it will not be repeated here.

[0013] Signal receiving wires R1-R6 are coupled to the touch display panel 110, signal transmission wires T1-T4, and the touch display chip 120, and are used to transmit the received touch signals RX1-RX6 to the touch display chip 120 according to the touch state of the touch unit of the touch display panel 110 (e.g., whether there is touch, touch intensity, etc.). In some embodiments, the signal receiving wires R1-R6 are configured according to a layout design, which may include, but is not limited to, the positions where the signal receiving wires R1-R6 are connected to the touch display chip 120, the wiring lengths of the signal receiving wires R1-R6, and the layout positions of the signal receiving wires R1-R6 in the touch display device 100. According to this layout design, the signal receiving wires R1-R6 can be classified into multiple wire groups for noise processing (which will be described in detail in subsequent paragraphs).

[0014] Signal transmission lines T1-T4 are coupled to the touch display chip 120 and signal receiving lines R1-R6. In some embodiments, signal transmission lines T1-T4 assist the touch display chip 120 in transmitting transmission signals TX1-TX4 to the signal receiving lines R1-R6, thereby controlling the signal receiving lines R1-R6 to sense the touch state of the display units of the touch display panel 110 at different times and transmit the corresponding touch signals RX1-RX6 to the touch display chip 120. The connection relationship and operation mode between the signal transmission lines T1-T4 and the signal receiving lines R1-R6 will be described in detail in subsequent paragraphs.

[0015] The touch display chip 120 is coupled to the touch display panel 110, noise cancellation circuits 130A and 130B, signal receiving wires R1 to R6 and signal transmission wires T1 to T4 to generate a display signal DIS to the touch display panel 110, and receive multiple signals from the signal receiving wires R1 to R6 and the noise cancellation circuits 130A and 130B, and then perform noise cancellation operation based on these signals.

[0016] Specifically, firstly, the touch display chip 120 transmits transmission signals TX1~TX4 to signal transmission lines T1~T4 to control signal receiving lines R1~R6 to transmit touch signals RX1~RX6 to the touch display chip 120. Next, the touch display chip 120 transmits the touch signals RX1~RX6 to noise cancellation circuits 130A and 130B, causing the noise cancellation circuits 130A and 130B to generate noise cancellation signals NCA and NCB based on the touch signals RX1~RX6 and send them to the touch display chip 120. Finally, the touch display chip 120 generates an adjustment touch signal based on the received touch signals RX1~RX6 and noise cancellation signals NCA and NCB and sends it to the touch display chip 120. In some embodiments, the touch display chip 120 can adjust the original display signal DIS based on the adjustment touch signal, allowing the touch display panel 110 to change the displayed screen according to touch operations.

[0017] Noise cancellation circuits 130A and 130B are coupled to the touch display chip 120 to generate corresponding noise cancellation signals NCA and NCB according to the received touch signals RX1 to RX6, and transmit the noise cancellation signals NCA and NCB to the touch display chip 120.

[0018] For example, in the embodiment of Figure 1, the signal receiving wires R1~R6 are classified into two wire groups, each containing signal receiving wires R1~R3 ​​and signal receiving wires R4~R6 respectively. The noise cancellation circuit 130A is used to receive the touch signals RX1~RX3 of one wire group and generate the corresponding noise cancellation signal NCA to the touch display chip 120, while the noise cancellation circuit 130B is used to receive the touch signals RX4~RX6 of the other wire group and generate the corresponding noise cancellation signal NCB to the touch display chip 120.

[0019] Figure 2A is a schematic diagram illustrating touch operation according to an embodiment of this disclosure. In some embodiments, each of the signal transmission lines T1 to T4 is connected to the signal receiving lines R1 to R6 to transmit transmission signals TX1 to TX4 to the signal receiving lines R1 to R6 respectively, thereby enabling the signal receiving lines R1 to R6 to transmit touch signals RX1 to RX6 to the touch display chip 120 at different time periods.

[0020] Please refer to Figures 2A and 2B together. Figure 2B is a timing diagram illustrating transmission signals TX1-TX4 according to an embodiment of this disclosure. In some embodiments, transmission signals TX1-TX4 have a low-level state (e.g., logic 0) and a high-level state (e.g., logic 1). When transmission signals TX1-TX4 switch to the high-level state for a specific period of time, signal receiving wires R1-R6 transmit touch signals RX1-RX6 to the touch display chip 120 during this period of time.

[0021] Taking the embodiment in Figure 2B as an example, the transmission signals TX1~TX4 are switched to the high level state in sequence during time periods P1~P4. Therefore, the signal receiving wires R1~R6 will transmit touch signals RX1~RX6 to the touch display chip 120 once each during time periods P1, P2, P3, and P4 according to the touch state of the touch unit.

[0022] In some embodiments, each touch signal has a signal strength, which can be represented by a voltage value, a current value, other relevant parameters, or any combination thereof. In some embodiments, when a touch unit receives a touch operation, the strength of the touch signal transmitted by the signal receiving wire corresponding to this touch unit is greater than the strength of the touch signals transmitted by other signal receiving wires.

[0023] Taking the embodiment in Figure 2A as an example, the signal strengths of touch signals RX1~RX6 during time periods P1~P4 are shown in Table 1 below: Signal strength (mV) Time period P1 P2 P3 P4 Touch signal RX1 -10 -15 9 -18 RX2 -6 7 17 3 RX3 7 104 13 -12 RX4 -10 -7 -29 twenty one RX5 -12 -twenty four -twenty three -10 RX6 -8 -17 10 25 Table 1.

[0024] In the embodiment shown in Figure 2A, the position of a touch point TC corresponds to the signal receiving wire R3 and the signal transmitting wire T2. In other words, the touch unit connected to the signal receiving wire R3 received a touch operation during time period P2. Therefore, the signal strength of touch signal RX3 during time period P2 will be significantly greater than the signal strength of other touch signals.

[0025] In some embodiments, when the signal strength of the touch signal is greater than or equal to a trigger threshold set by the system, the corresponding touch unit is determined to have sensed a touch operation. Conversely, when the signal strength of the touch signal is less than the trigger threshold, this touch signal is treated as noise for subsequent noise cancellation signal calculation.

[0026] Following the example in Table 1 above, Table 2 below shows the changes in the average value and standard deviation of noise before and after noise cancellation operation according to the prior art. Before noise cancellation operation Signal strength (mV) Time period P1 P2 P3 P4 Average noise -6.5 -11.2 -0.5 1.5 Standard deviation of noise 6.32 10.59 18.29 16.48 After noise cancellation operation Signal strength (mV) Time period P1 P2 P3 P4 Average noise 0.5 -0.2 0.5 -0.5 Standard deviation of noise 6.32 10.59 18.29 16.48 Table 2.

[0027] In some instances, the signal strength of the noise cancellation signal depends on the average signal strength of all noise signals within the same time period, and the touch signal adjustment is achieved by subtracting the noise cancellation signal strength from the signal strength of all touch signals. However, as shown in Table 2, since all touch signals undergo the same degree of adjustment (i.e., the same noise cancellation signal is subtracted), although the average noise signal strength decreases, the standard deviation of the noise signal strength remains unchanged. Therefore, significant differences still exist in the noise levels after noise cancellation operations using prior art, and due to differences in circuit component layout design, some signal receiving lines may still have stronger noise.

[0028] As described above, in the touch display device 100 of this disclosure, the signal receiving wires R1 to R6 are classified into a first wire group containing signal receiving wires R1 to R3 and a second wire group containing signal receiving wires R4 to R6. The noise cancellation circuits 130A and 130B are used to calculate the average signal strength of the noise in the two wire groups respectively, so as to generate corresponding noise cancellation signals NCA and NCB.

[0029] Following the embodiments in Table 1 above, Table 3 below shows the changes in the average value and standard deviation of noise before and after noise cancellation operation of the touch display device 100 according to this disclosure. Before noise cancellation operation Signal strength (mV) Time period P1 P2 P3 P4 Average noise level of the first conductor group -3 -4 13 -9 Average noise level of the second conductor group -10 -16 -14 12 Standard deviation of noise 6.32 10.59 18.29 16.48 After noise cancellation operation Signal strength (mV) Time period P1 P2 P3 P4 Average noise level of the first conductor group 0 0 0 0 Average noise level of the second conductor group 0 0 0 0 Standard deviation of noise 5.26 8.81 12.34 12.7 Table 3.

[0030] Table 3 shows that after noise cancellation, both the average value and standard deviation of the noise decreased. In other words, the differences in noise intensity caused by variations in the layout design of circuit components were reduced.

[0031] It should be noted that the number and classification of signal receiving wires, signal transmitting wires, wire groups, and noise cancellation circuits in Figures 1 and 2A are merely examples and are not intended to limit this disclosure. In some embodiments, each wire group corresponds to one noise cancellation circuit, so the number of noise cancellation circuits is greater than or equal to the number of wire groups. In other embodiments, one noise cancellation circuit may correspond to more than one wire group, so the number of noise cancellation circuits is less than the number of wire groups.

[0032] Furthermore, in some embodiments, in order to maintain objectivity in calculating the noise cancellation signal, each conductor group includes at least two signal receiving conductors to ensure that the noise cancellation signal is calculated based on at least two noise sources.

[0033] In summary, other numbers and other classifications of signal receiving wires, signal transmitting wires, wire assemblies and noise cancellation circuits are all within the scope of this disclosure.

[0034] As described above, the signal receiving wires in a noise cancellation system can be classified into multiple wire groups according to the layout design. In some embodiments, this layout design relates to the placement of the signal receiving wires. Figure 3A is a schematic diagram of a noise cancellation system 300A according to an embodiment of this disclosure. In the embodiment of Figure 3A, the signal receiving wires R1-R6 in the noise cancellation system 300A are classified into two wire groups according to their placement. Specifically, signal receiving wires R1-R3 are classified into one wire group because they are located in the upper half of the noise cancellation system 300A, and the noise cancellation circuit 130A receives touch signals RX1-RX3 and generates corresponding noise cancellation signals NCA; signal receiving wires R4-R6 are classified into another wire group because they are located in the lower half of the noise cancellation system 300A, and the noise cancellation circuit 130B receives touch signals RX4-RX6 and generates corresponding noise cancellation signals NCB.

[0035] In some embodiments, the layout design described above relates to the wiring pattern of the signal receiving wires. Figure 3B is a schematic diagram of a noise cancellation system 300B according to another embodiment of this disclosure. In the embodiment of Figure 3B, the signal receiving wires R1 to R6 in the noise cancellation system 300B are classified into two wire groups according to their connection to the touch display chip 120. Specifically, signal receiving wires R1, R3, and R5 are classified into one wire group because they are connected to the left side of the touch display chip 120, and the noise cancellation circuit 130A receives touch signals RX1, RX3, and RX5 and generates the corresponding noise cancellation signal NCA; signal receiving wires R2, R4, and R6 are classified into the other wire group because they are connected to the right side of the touch display chip 120, and the noise cancellation circuit 130B receives touch signals RX2, RX4, and RX6 and generates the corresponding noise cancellation signal NCB.

[0036] In some embodiments, the signal receiving wires in the touch display device 100 can be classified into three or more wire groups, corresponding to three or more noise cancellation circuits. Furthermore, in some embodiments, the layout design described above relates to the wiring length of the signal receiving wires. Figure 3C is a schematic diagram of a noise cancellation system 300C according to yet another embodiment of this disclosure. In the embodiment of Figure 3C, the signal receiving wires R1 to R8 in the noise cancellation system 300C are classified into three wire groups according to their layout position and wiring length. Specifically, signal receiving wires R1-R3 are classified into one wire group because they are located on the left side of the noise cancellation system 300C and have a longer wiring distance. The noise cancellation circuit 130A receives touch signals RX1-RX3 and generates the corresponding noise cancellation signal NCA. Signal receiving wires R4 and R5 are classified into another wire group because they are located in the middle of the noise cancellation system 300C and have a shorter wiring distance. The noise cancellation circuit 130B receives touch signals RX4 and RX5 and generates the corresponding noise cancellation signal NCB. Signal receiving wires R6-R8 are classified into yet another wire group because they are located on the right side of the noise cancellation system 300C and have a longer wiring distance. The noise cancellation circuit 130C receives touch signals RX6-RX8 and generates the corresponding noise cancellation signal NCC.

[0037] Furthermore, as mentioned above, in some embodiments not shown, the number of noise cancellation circuits may be less than the number of wire groups. For example, the noise cancellation system 300C in Figure 3C may not include noise cancellation circuit 130C (i.e., it may only include two noise cancellation circuits). In this case, noise cancellation circuit 130A is connected not only to the wire groups (signal receiving wires R1~R3) on the left side of the noise cancellation system 300C, but also to the wire groups (signal receiving wires R6~R8) on the right side of the noise cancellation system 300C to generate a noise cancellation signal.

[0038] It should be noted that the number of touch display chips shown in Figures 1, 2A, and 3A through 3C is merely an example and is not intended to limit this disclosure. Noise cancellation systems with other numbers of touch display chips are all within the scope of this disclosure. In some embodiments, the touch display device 100 may include two or more touch display chips.

[0039] Figure 3D is a schematic diagram of a noise cancellation system 300D according to another embodiment of this disclosure. In the embodiment of Figure 3D, the noise cancellation system 300D includes touch display chips 120A and 120B, wherein touch display chip 120A is connected to signal receiving lines R1-R4, and touch display chip 120B is connected to signal receiving lines R5-R8. In other words, touch display chip 120A is connected to a first portion of signal receiving lines R1-R8 (e.g., signal receiving lines R1-R4), and touch display chip 120B is connected to a second portion of signal receiving lines R1-R8 (different from the first portion, e.g., signal receiving lines R5-R8), to process noise in signal receiving lines R1-R8 respectively.

[0040] Furthermore, similar to the embodiments in Figures 3A and 3B, in the embodiment in Figure 3D, the touch display chips 120A and 120B are each coupled to two noise cancellation circuits, and each of these two noise cancellation circuits is used to calculate noise cancellation signals corresponding to at least two sets of wires.

[0041] Specifically, the touch display chip 120A is coupled to noise cancellation circuits 130A and 130B. Noise cancellation circuit 130A generates a noise cancellation signal NCA for one group of wires (signal receiving wires R1 and R2) among the signal receiving wires R1 to R4, and noise cancellation circuit 130B generates a noise cancellation signal NCA for the other group of wires (signal receiving wires R3 and R4) among the signal receiving wires R1 to R4. Touch display chip 120B is coupled to noise cancellation circuits 130C and 130D. Noise cancellation circuit 130C generates a noise cancellation signal NCC for one group of wires (signal receiving wires R5 and R6) among the signal receiving wires R5 to R8, and noise cancellation circuit 130D generates a noise cancellation signal NCD for the other group of wires (signal receiving wires R7 and R8) among the signal receiving wires R5 to R8.

[0042] In some embodiments, touch display chips 120A and 120B are connected to each other to synchronously control the signal receiving wires R1 to R8 to generate touch signals RX1 to RX8 through the signal transmission wires T1 to T5 at multiple time periods (e.g., the time periods corresponding to the signal transmission wires T1 to T5 respectively).

[0043] In some embodiments, the touch display chip (e.g., touch display chips 120, 120A, 120B) is further used to store a pairing table. This pairing table stores the correspondence between the layout design of signal receiving wires and the configuration methods that classify multiple signal receiving wires into multiple wire groups. In operation, when the touch display chip receives a layout design for the signal receiving wires (e.g., a configuration based on the layout design in Figures 3A to 3D), the touch display chip determines the configuration method of the corresponding wire group according to the pairing table. In this way, the touch display chip of this disclosure can be applied to various touch display devices with different layout designs.

[0044] The noise cancellation system and touch display device disclosed herein can classify multiple signal receiving wires based on their various characteristics, thereby eliminating multiple types of noise to varying degrees. This noise cancellation method not only reduces the impact of layout design on the noise cancellation effect but also enhances its flexibility when applied to various touch display screens.

[0045] The above are merely preferred embodiments of this disclosure. Various modifications and equivalent changes can be made to the structure of this disclosure without departing from its scope or spirit. In summary, all modifications and equivalent changes made to this disclosure within the scope of the following claims are within the scope of this disclosure.

[0046] 100: Touch display device 110: Touch display panel 120, 120A, 120B: Touch display chips 130A~130D: Noise cancellation circuit 300A~300D: Noise Cancellation System DIS: Display signal NCA, NCB, NCC, NCD: Noise cancellation signals P1~P4: Time Period R1~R8: Signal receiving wires RX1~RX8: Touch Signal T1~T5: Signal transmission wires TC: Touch Point TX1~TX4: Transmitted signals

[0047] Domestic storage information (please note in order of storage institution, date, and number) none Overseas storage information (please note in the order of storage country, institution, date, and number) none

Claims

1. A noise cancellation system comprising: a plurality of signal receiving wires for receiving a plurality of touch signals from a touch display panel, wherein the signal receiving wires are classified into a plurality of wire groups according to a layout design; a plurality of noise cancellation circuits coupled to the wire groups, each for generating a corresponding noise cancellation signal based on the touch signals received by each wire group; and a first touch display chip for receiving the touch signals and the corresponding noise cancellation signals from each wire group to generate a plurality of adjustment touch signals, wherein the number of the noise cancellation circuits is greater than or equal to the number of the wire groups, wherein each of the touch signals has a signal strength, and when the signal strength of one of the touch signals is less than a trigger threshold, the one of the touch signals is used as noise.

2. The noise cancellation system as claimed in claim 1, wherein each noise cancellation circuit is configured to calculate an average value of the signal strength of the noise in a corresponding one of the wire groups, and generate the noise cancellation signal based on the average value.

3. The noise cancellation system as claimed in claim 1, wherein the layout design relates to a plurality of layout positions of the signal receiving wires, and the signal receiving wires are classified into wire groups according to the layout positions.

4. The noise cancellation system as claimed in claim 1, wherein the layout design relates to a plurality of wiring lengths between the signal receiving wires and the first touch display chip, and the signal receiving wires are classified into wire groups according to the wiring lengths.

5. The noise cancellation system as claimed in claim 1, wherein the first touch display chip is further configured to store a pairing table for storing a correspondence between the layout design of the signal receiving wires and a configuration that classifies the signal receiving wires into groups of wires.

6. The noise cancellation system as claimed in claim 1 further includes a plurality of signal transmission lines coupled to the first touch display chip and the signal receiving lines, wherein the first touch display chip is used to control a first portion of the signal receiving lines to generate the touch signals in a plurality of time periods via the signal transmission lines.

7. The noise cancellation system as claimed in claim 1 further includes a second touch display chip, wherein the first touch display chip is coupled to a first portion of the signal receiving wires, wherein the second touch display chip is coupled to a second portion of the noise cancellation circuit and the signal receiving wires for receiving the touch signals and the noise cancellation signals of the second portion to generate the adjustment touch signals, and wherein the first portion is different from the second portion.

8. The noise cancellation system as described in claim 7 further includes a plurality of signal transmission lines coupled to the first touch display chip, the second touch display chip, and the signal receiving lines, wherein the first touch display chip is configured to control the first portion of the signal receiving lines to generate the touch signals at a plurality of time periods via the signal transmission lines, and wherein the second touch display chip is configured to control the second portion of the signal receiving lines to generate the touch signals at the time periods via the signal transmission lines.

9. The noise cancellation system as claimed in claim 8, wherein the first touch display chip and the second touch display chip are connected to each other to synchronously control the signal receiving lines during the respective time periods.

10. A touch display device, comprising: a touch display panel including a plurality of touch units and a plurality of display units, wherein the touch units have a touch state and the display units are configured to generate a display image according to a display signal; a plurality of signal receiving wires for receiving a plurality of touch signals from the touch display panel, wherein the signal receiving wires are classified into a plurality of wire groups according to a layout design; a plurality of noise cancellation circuits coupled to the wire groups, each configured to generate a corresponding noise cancellation signal according to the touch signals received by each wire group; and a first touch display chip for receiving the touch signals and the corresponding noise cancellation signals from each wire group to generate a plurality of adjustment touch signals, wherein the number of noise cancellation circuits is greater than or equal to the number of wire groups. Each of the touch signals has a signal strength. When the touch state of the touch units indicates that one of the touch units has received a touch operation, the signal strength of the corresponding one of the touch signals is greater than the signal strength of the other touch signals. When the signal strength of one of the touch signals is less than a trigger threshold, that one of the touch signals is used as noise.

11. The touch display device as claimed in claim 10, wherein each noise cancellation circuit is configured to calculate an average value of the signal strengths of the noises in a corresponding one of the wire groups, and generate the noise cancellation signals based on the average value.

12. The touch display device as claimed in claim 10, wherein the layout design relates to a plurality of layout positions of the signal receiving wires, and the signal receiving wires are classified into wire groups according to the layout positions.

13. The touch display device as claimed in claim 10, wherein the layout design relates to a plurality of wiring lengths between the signal receiving wires and the first touch display chip, and the signal receiving wires are classified into wire groups according to the wiring lengths.

14. The touch display device as claimed in claim 10, wherein the first touch display chip is further configured to store a pairing table for storing a correspondence between the layout design of the signal receiving wires and a configuration that classifies the signal receiving wires into groups of wires.

15. The touch display device as claimed in claim 10 further includes a plurality of signal transmission lines coupled to the first touch display chip and the signal receiving lines, wherein the first touch display chip is used to control a first portion of the signal receiving lines to generate the touch signals at a plurality of time periods via the signal transmission lines.

16. The touch display device as claimed in claim 10 further includes a second touch display chip, wherein the first touch display chip is coupled to a first portion of the signal receiving wires, wherein the second touch display chip is coupled to a second portion of the noise cancellation circuit and the signal receiving wires for receiving the touch signals and the noise cancellation signals of the second portion to generate the adjustment touch signals, and wherein the first portion is different from the second portion.

17. The touch display device as claimed in claim 16 further includes a plurality of signal transmission lines coupled to the first touch display chip, the second touch display chip, and the signal receiving lines, wherein the first touch display chip is configured to control the first portion of the signal receiving lines to generate the touch signals at a plurality of time periods via the signal transmission lines, and wherein the second touch display chip is configured to control the second portion of the signal receiving lines to generate the touch signals at the time periods via the signal transmission lines.

18. The touch display device as claimed in claim 17, wherein the first touch display chip and the second touch display chip are connected to each other to synchronously control the signal receiving lines during the time periods.

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