TW201520835A - Touch device and data processing method thereof - Google Patents

Abstract

A data processing method for a touch device is disclosed. The data transmission method comprises steps as follows: determining number of touch object of the capacitive touch device; when number of the touch object is larger than one, performing a loss compression method; and when number of the touch object is equal to one, performing a lossless compression method. The loss compression method comprises steps as follows: capturing at least one capacitive sensing data of the capacitive touch device; transforming the capacitive sensing data to a quantization data via a curve filter; and encoding and compressing the quantization data as a first packet data and transmitting the first packet data to a processing unit.

Description

Touch device and data processing method thereof

The present invention relates to a data processing method, and more particularly to a data processing method for a touch device.

In today's various consumer electronics market, portable electronic products such as personal digital assistants (PDAs), mobile phones, and PDA phones have widely used touch panels as an interface tool for data communication. . Moreover, since the design of electronic products is currently in the direction of light, thin, short, and small, there is not enough space on the product to accommodate traditional input devices such as keyboards and mice, especially in the demand for tablet computers that are designed with humanity in mind. Next, display devices with touch panels have gradually become one of the key components of various electronic products. However, there are many touch panel technologies developed today, such as resistive, capacitive, ultrasonic, and infrared sensing touch panels, and these types of touches are different due to differences in technology and cost. The panels are used in a variety of different areas. Most touch-sensitive electronic products only have the function of single-sided touch, such as providing a touch panel with touch input and display functions on one side of the electronic product. Due to the development of touch technology, there are many special applications in mobile phones, such as passive pens, Charger Noise, etc., all of which require a large amount of resources and time for the touch integrated circuit (IC) to carry out huge sensing. The data, which causes the touch IC to be overloaded, cannot reduce the size and cost, and reduces the overall data processing speed.

The embodiment of the present invention provides a data processing method for a touch device. The data processing method includes the following steps: capturing at least one sensing data of the touch device; converting the sensing data into quantitative data through a quantization function; encoding the quantized data and compressing the data into The data is encapsulated, and the packet data is transmitted to a processing unit on the host side to calculate a touch coordinate, wherein the quantization function is a staircase curve and the sensing data is converted into quantitative data through a quantization function.

In one embodiment of the present invention, wherein the quantization function determines the order of the curve according to the first quantization parameter, and determines the target area according to the second quantization parameter, the target area corresponding to the region where the slope of the curve of the quantization function rises rapidly.

In one embodiment of the present invention, in the step of converting the sensing data into the quantized data through the quantization function, the conversion data of the sensing data in the target region converted into the quantization order according to the quantization function is higher than that outside the target region. The sensing data is converted into a conversion resolution of the quantization order according to the quantization function.

In one embodiment of the present invention, the first quantization parameter and the second quantization parameter are set according to the type or number of corresponding objects sensed by the touch device, wherein the first quantization parameter and the second quantization parameter are The ratio determines the quantization characteristics of the quantization function.

In one embodiment of the present invention, the quantized data obtained by sensing data at successive time points is subtracted to obtain quantized difference data, and the quantized difference data is one of quantized data.

In one embodiment of the present invention, the processing unit performs inverse conversion after receiving the packet data, and the inverse transform is used to decode the packet data to be decompressed into quantized data, and convert the quantized data back through the quantization inverse function of the processing unit. Inductive data, wherein the quantized inverse function is an inverse function of the quantization function.

In one embodiment of the present invention, the touch device is a capacitive touch device, and the sensing data is capacitive sensing information.

The embodiment of the present invention further provides a data processing method for a touch device. The data processing method includes the following steps: capturing at least one sensing data of the touch device, the sensing data includes at least one sensing frame; and the sensing frame has a maximum sensing The sensing point of the quantity is used as the sensing reference point, and the first area is determined by the sensing reference point. The first area includes the sensing reference point and a plurality of sensing points adjacent thereto; and the sensing quantity and the sensing reference of each sensing point in the first area are encoded. The sensing amount and coordinates of the point are compressed into packet data, and the packet data is transmitted to the processing unit at the host end.

In one embodiment of the present invention, the sensing data obtained at successive time points is subtracted to obtain the sensing difference data, and the sensing difference data is one of the sensing data.

In one embodiment of the present invention, the sensing data obtained by the first region of the successive time points is subtracted to obtain the sensing difference data, and the sensing difference data is one of the sensing materials.

In one embodiment of the present invention, the processing unit receives the packet data for inverse conversion, and the inverse conversion is to decode the packet data to decompress the sensing data, thereby causing the processing unit to perform reverse data processing.

The embodiment of the present invention further provides a data processing method for a touch device. The data processing method includes the following steps: capturing at least one sensing data of the touch device; determining the number of touch objects on the touch device; When the number is greater than one, a first compression mode is performed, wherein the first compression mode comprises the steps of: converting the sensing data into quantitative data through a quantization function; converting the sensing data into quantitative data through a quantization function; and encoding the quantitative data and Compressed into the first packet data, and the first packet data is transmitted to the processing unit on the host side to calculate the touch coordinates. When the number of touch objects is not equal to one, a second compression mode is performed, wherein the sensing data includes at least one sensing frame, and the second compression mode includes: sensing points having a maximum sensing amount in the sensing frame as An inductive reference point is used to determine a first area by sensing a reference point, the first area includes an inductive reference point and a plurality of sensing points adjacent thereto; and the sensing quantity of each sensing point in the first area is transmitted and the sensing point is induced The processing unit of the quantity and coordinates to the host end; the sensing quantity and the coordinate of the sensing point of the sensing point in the first area are compressed into the second packet data, and the second packet data is transmitted to the processing unit.

The embodiment of the invention further provides a touch device, which comprises a touch panel, a sensing module, a controller and a processing unit. The touch panel has a side, and the sensing module has a plurality of sensing lines. The sensing line is disposed on the side of the touch panel, and the sensing module is electrically connected to the touch panel. The controller is electrically connected to the sensing module, and the controller is configured to execute a data processing method, wherein the controller comprises a curve filter. The processing unit is electrically connected to the controller. The data processing method includes the following steps: determining the number of touch objects on the touch device; when the number of touch objects is greater than one, performing the first compression mode; and when the number of touch objects is not greater than one, proceeding The second compression mode.

In summary, the touch device and the data processing method thereof according to the embodiments of the present invention determine the data processing method by determining the number of touch objects, when the number of touch objects is greater than one (ie, multi-touch) The touch device performs a lossy compression method to reduce the amount of data. On the other hand, when the number of touch objects is equal to one time (ie, single touch), the touch device performs a lossless compression method. Accordingly, embodiments of the present invention can effectively reduce the cost of the integrated circuit and increase the processing speed and can implement some highly complex algorithms.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

100, 400, 600‧‧‧ touch devices

110‧‧‧Touchpad

112‧‧‧Induction module

120‧‧‧ Controller

122‧‧‧Curve filter

130‧‧‧Processing unit

A, B‧‧‧ coordinates

DS1‧‧‧Induction data

PK1‧‧‧ first package information

PK2‧‧‧Second package information

P0‧‧‧Induction reference point

P1~P8‧‧‧ sensing points

SL‧‧‧Induction line

SR‧‧‧First Area

S205, S210, S220, S230, S240‧‧‧ steps

S222, S224‧‧‧ steps

S242, S244‧‧‧ steps

TR‧‧‧ target area

FIG. 1 is a schematic diagram of a touch device according to an exemplary embodiment of the invention.

2 is a flow chart of a data processing method according to an embodiment of the present invention.

FIG. 3 is a flow chart of a data processing method according to another embodiment of the present invention.

4 is a block diagram of a touch device according to another embodiment of the present invention.

Figure 5 is a graph of a quantization function in accordance with an embodiment of the present invention.

FIG. 6 is a block diagram of a touch device according to still another embodiment of the present invention.

Various illustrative embodiments are described more fully hereinafter with reference to the accompanying drawings. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this invention will be in the In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Similar numbers always indicate similar components.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, such elements are not limited by the terms. These terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second element without departing from the teachings of the inventive concept. As used herein, the term "and/or" includes any of the associated listed items and all combinations of one or more.

With the development of touch technology, there are many special applications in mobile phones, such as passive pens, Charger Noise, etc., all of which require considerable resources for digital signal processing, which will cause the cost of integrated circuits to be high. Furthermore, in today's popular use of capacitive touch products, more and more mobile devices are using capacitive touch as the main selling point. Therefore, with the development of capacitive touch technology, how to make touch integrated circuits (IC) The cost is reduced, but its performance can be above a certain level, which has become the goal pursued by various manufacturers. Therefore, if the data processing of this part can be processed by the processing unit to respond quickly to the user's operation instructions (single touch or multi-touch), the cost of the integrated circuit can be effectively reduced and increased. Processing speed and some highly complex algorithms can be implemented.

The present disclosure provides a data processing method for a touch device. Since the touch panel is in a multi-touch manner, the amount of data generated is quite large. The quantitative mechanism and compression mechanism of the content to reduce the amount of data to be processed (that is, to leave important information), and thereby increase the speed of transferring data to the processing unit to improve the overall data processing rate.

The present disclosure further provides a data processing method for a touch device. When the touch panel is in a single touch, the sensing point of the maximum sensing amount is used as the sensing reference point, and the first region is determined by the sensing reference point. The first area includes the sensing reference point and a plurality of sensing points adjacent thereto. Then, the sensing quantity of each sensing point in the first area and the coordinates of the sensing reference point are encoded and transmitted to the processing unit for subsequent data processing, thereby improving the overall data processing speed.

The data processing method and the touch device will be described in conjunction with the drawings in various embodiments. However, the following embodiments are not intended to limit the present invention.

[Embodiment of Touch Device]

Please refer to FIG. 1 , which is a schematic diagram of a touch device according to an exemplary embodiment of the invention. As shown in FIG. 1 , the touch device 100 includes a touch panel 110 , a sensing module 112 (sensing circuit), a controller 120 and a processing unit 130 , wherein the touch panel 110 has a sensing matrix formed by criss-crossing traces. The sensing module 112 is disposed on a side of the touch panel 110 , and the sensing module 112 has a plurality of sensing lines SL to correspondingly connect the traces on the touch panel 110 . In the present embodiment, the sensing line SL and the trace are different wires, but are not limited to the embodiment. The controller 120 is electrically connected to the sensing module 112. The controller 120 is configured to perform the data processing method of the present disclosure, that is, the lossy compression method (first compression mode) and the lossless compression method (second compression mode). The processing unit 130 is electrically connected to the controller 120, wherein the processing unit 130 can be a Digital Signal Processor (DSP) or a Central Processing Unit. In the disclosure, the touch device 100 uses the touch panel 100, and the touch device 100 drives or senses the sensing amount of each trace as the sensing data through the sensing module 112, and preprocesses each sensing data. jobs. Furthermore, the data processing method of the present disclosure includes a lossy compressed data processing method (first compression mode) and a lossless compression data processing method (second compression mode), wherein The content of the touch object is positively correlated with the number of touch objects touching the touch panel. Therefore, the present disclosure further provides a decision mechanism for the touch device 100 to determine the lossy compression according to the number of touch objects on the touch device 100. One of the data processing methods (for processing high data volume) and the lossless compression data processing method (for processing low data volume) is to improve the performance of the touch device 100 in data transmission. That is, in an embodiment, when the amount of data transmitted by the touch device 100 is high, the amount of data to be transmitted can be reduced by the quantization mechanism provided by the controller 120, and then the quantized sensing data is encoded. Work with compressed data processing.

What follows is to further explain the working mechanism of the data processing method of the touch device 100.

Please refer to FIG. 1 and FIG. 2 simultaneously. FIG. 2 is a flowchart of a data processing method according to an embodiment of the present invention. In this embodiment, the data processing method includes the following steps: determining whether the number of touch objects on the touch device 100 is greater than one (step S210); if yes, performing the first compression mode (step S220); and, if not, The second compression mode is performed (step S240). In one embodiment, the data processing method further includes the step of determining whether the number of touch objects on the touch device 100 is equal to one (step S230). The steps of the embodiment of the present invention are merely for convenience of description, and the embodiments of the present invention are not intended to limit the various embodiments of the present invention in the order of the steps. Each step will be described in more detail below to better understand the disclosure.

First, the content of the disclosure first determines whether the number of touch objects is greater than one through the controller 120, thereby initially determining the amount of data. In general, when the touch device 100 is in a multi-touch or single-touch manner, the amount of data generated by the multi-touch may be greater than the amount of data generated by the single-touch. When the number of touch objects on the touch device 100 is greater than one, it means that the user operates the touch device 100 in a multi-touch manner (for example, sliding on two touch pads on the touch panel), and the data processing method The process proceeds to step S220 to perform a correlation process of the first compression mode (lossy compression method), thereby reducing the amount of data generated by the multi-touch by a quantization mechanism. On the other hand, when the number of touch objects on the touch device 100 is not more than one, it indicates that the user The single touch mode (for example, a single finger operating on the touch panel) operates the touch device 100, and the data processing method proceeds to step S240 to perform a related procedure of the second compression mode (lossless compression method). In one embodiment, when the number of touch objects on the touch device 100 is not more than one, the controller 120 of the touch device 100 proceeds to step S230 to determine whether the number of touch objects is equal to one. If the number of touch objects is equal to one, it means that the user operates the touch device 100 in a single touch manner, and the data processing method proceeds to step S240; on the other hand, if the number of touch objects is not equal to one time , the data processing method will return to step S210.

With respect to the first compression mode (lossy compression method) of step S220, the disclosure is to receive a plurality of sensing materials captured by the sensing module 112 through the controller 120 at the touch end to perform quantization processing to reduce the huge amount. The amount of raw sensing data. Then, after the signal processing of encoding and compressing the quantized data is performed, the controller 120 transmits the data to the processing unit 130 on the host side in a packet manner for subsequent data processing. On the other hand, with respect to the lossless compression method of step S240, the present disclosure is to perform encoding and compression processing on a part of the data near the coordinates of the single touch through the controller 120.

The first compressed mode (lossy compression method) and the second compressed mode (lossless compression method) in the data processing method will be described in more detail below.

[Another embodiment of the data processing method]

Please refer to FIG. 3, FIG. 4, FIG. 5 and FIG. 6. FIG. 3 is a flowchart of a data processing method according to another embodiment of the present invention. 4 is a block diagram of a touch device according to another embodiment of the present invention. Figure 5 is a graph of a quantization function in accordance with an embodiment of the present invention. FIG. 6 is a block diagram of a touch device according to still another embodiment of the present invention. As shown in FIG. 3, the data processing method further includes capturing at least one sensing material of the touch device 400 (step S205) and the first compression mode (step S220) includes the step of: converting the sensing data into (via the curved filter 122) Or mapping to the quantized data, wherein the curve filter 122 has a quantization function (step S222), encoding the quantized data and compressing it into the first packet data PK1, and transmitting the first packet data PK1 to the processing unit 130 (step S224). It should be noted that the steps of the embodiment of FIG. 3 are only for convenience of description, and the embodiments of the present invention do not use the steps of the steps as a limitation of implementing various embodiments of the present invention. Each step will be described in more detail below to better understand the disclosure.

In step S205, when the touch device 400 is in multi-touch, the sensing module 112 receives the sensing lines of the touch panels 110 or the sensing points of the sensing points through the sensing line SL as at least one sensing. The data DS1, in the embodiment, the sensing data DS1 is sensing information of each sensing point in the sensing frame at different time points. At this time, due to the multi-touch relationship, the amount of data of the sensing data DS1 captured by the sensing module 112 is relatively large. In addition, in FIG. 6 , when the touch device 600 is in a single touch, the sensing module 112 senses or detects the sensing amount of each sensing point of the touch panel 110 through the sensing line SL to obtain touch. The sensing device DS1 controls the data DS1, wherein the controller 120 first scans the sensing amount of each point of the touch panel to find the sensing point having the largest sensing amount.

In step S222, in the embodiment, the controller 120 further includes a curve filter 122, and the curvature signal 122 is used to perform the higher sensing data DS1 located in the target area TR. The quantization process of the curve order is performed, and the sensing data DS1 located outside the target area TR is subjected to quantization processing of the lower curve order; that is, the conversion data DS1 in the target area TR is converted into the quantization order according to the quantization function. The degree of conversion is higher than that of the sensing data DS1 outside the target area TR according to the quantization function, and the important information of the sensing data DS1 is retained to improve the data transmission speed. Further, the disclosure discloses that the sensing data DS1 is converted into (or mapped to) the quantized data through the curve filter 122, wherein the curve filter 122 has a quantization function (that is, a mathematical form of the curve filter), and is quantized. The mathematical form of the function is as shown in equation (1), in which the quantization function represents a staircase curve, and the sensing data DS1 is converted (mapped) to the quantized data through the quantization function, so in the process of quantitative conversion of the data, the method is not Avoid the phenomenon of data loss. In the quantization function of the embodiment, the symbol a represents the first quantization parameter, And the symbol b represents the second quantization parameter, the symbol Xmax represents the maximum inductive amount range, the symbol Ymax is the maximum quantization order (the maximum value of the quantized data), and the symbol M is set according to the peak value of the touch object, and in this embodiment M is one-half of Xmax, where Xmax is mapped to Ymax through a quantization function, and the curve of the quantization function passes through zero point (0, 0), and the numerical values of Xmax and Ymax are designed by the designer according to actual application requirements. It should be noted that, in this embodiment, the quantization function determines the curve order according to the first quantization parameter (ie, a) and determines the position of the target area TR according to the second quantization parameter (ie, b), and the designer can The values of the first quantization parameter and the second quantization parameter are determined according to actual application requirements, so as to be able to flexibly face a wide variety of touch requirements. Furthermore, as shown in FIG. 5, the target area TR is preferably defined as or corresponds to a region where the slope of the curve of the quantization function rises rapidly, wherein the sensing data in the target area TR is important information, and thus the degree of the curve in the target area TR The density is higher to reduce the error of the data in the quantitative conversion process. It should be noted that the curve of the quantization function shown in FIG. 5 is an embodiment, which is only for convenience of explanation of the disclosure, and the curve of the quantization function is not limited to that shown in FIG. 5. In more detail, the first quantization parameter (ie, a) and the second quantization parameter (ie, b) that the designer needs to set are set according to the type or number of corresponding objects sensed by the touch device 400. Determining the quantization order and the location of the target area TR, so that the touch device 400 of the present disclosure is more suitable for the development of today's touch technology, wherein the first quantization parameter (ie, a) and the second quantization parameter (ie, b) The ratio between the values determines the quantization characteristic of the curve filter 122. For example, in the parameter setting process of the quantization function, a quantization characteristic in which a is 100 and b is 20 is equal to a quantization characteristic in which a is 10 and b is 2.

Next, it should be noted that, regarding other characteristics of the quantization function of the present disclosure, when the sensing value of the sensing data DS1 is greater than Xmax, the sensing data DS1 is mapped. When it is detected to Ymax, and when the value of the sensing data DS1 is less than zero, the sensing data DS1 is first taken to the absolute value and then mapped to the quantized data, and the value of the quantized data is added with a minus sign. Through the above definition, the disclosure can effectively convert the sensing data DS1 (0~Xmax) into a limited quantization interval (ie, 0~Ymax). In brief, the quantization function of the present disclosure can set the mapping between the starting point coordinates (ie, (0, 0)) and the ending coordinates (ie, (Xmax, Ymax)), and the designer can according to the type of the touch object. Or the number to further design a ratio (ie, a/b) between the first quantization parameter (ie, a) and the second quantization parameter (ie, b) to determine the target region in the graph (quantization function) of FIG. TR position and quantization order. Accordingly, the disclosure can further reduce the amount of data by using a large number of sensing data DS1 through a quantization function for subsequent encoding and compression of data processing. For example, the inductive amount of coordinate A is 600, the corresponding quantization order is 5, and the sensing amount of coordinate B is 1150, and the corresponding quantization order is 20.

It is worth mentioning that, in another embodiment, the disclosure utilizes the concept of a continuous image, and the controller 120 subtracts the quantized data obtained by the sensing data DS1 in the sensing frame at successive time points to obtain A quantized difference data, wherein the quantized difference data can also be used as one of the quantitative data.

In step S224, the controller 120 encodes and compresses the quantized data into the first packet data PK1, and transmits the first packet data PK1 to the processing unit 130 on the host side for data processing, thereby causing the processing unit 130 to By performing operations such as data processing operations, the load of the integrated circuit is reduced, and the size thereof is reduced, so that the cost of the integrated circuit can be effectively reduced. Further, in the present embodiment, the controller 120 uses the JPEG compression method (incorporating Huffman and Run-length) to encode and compress the quantized data. Moreover, in other embodiments, the controller may utilize other encoding compression methods and is not limited by this embodiment.

After that, the processing unit 130 starts to perform the first inverse conversion after receiving the first packet data PK1. The first inverse conversion is to decode and decompress the first packet data PK1 into quantized data, and pass the quantization inverse function of the processing unit 130 to quantize the resource. The material is converted to the sensing data DS1, so that the processing unit 130 performs coordinate processing such as coordinate calculation on the sensing data DS1 (for example, calculating a touch coordinate), wherein the quantization inverse function is an inverse function of the quantization function, and the mathematical form of the quantization inverse function is as follows. Equation (2), and when the value of the quantized data is less than zero, the quantized data is first taken to the absolute value and then mapped to the sensing data, and the value of the sensing data is added with a minus sign.

Therefore, through the above mechanism, the touch device 400 of the present disclosure can initially reduce the amount of original data (the sensing data DS1) through the quantization mechanism, and transmit it to the processing unit 130 of the host through encoding and compression. To improve overall data transmission efficiency. In this way, the sensing data DS1 can be quickly transmitted to the processing unit 130 by the compression technique of the present invention, and the processing unit 130 having high-speed data processing capability can perform data processing such as coordinate calculation, thereby reducing the load of the controller 120. Reduce the size of its integrated circuit and memory requirements to achieve cost reduction.

[Another embodiment of the data processing method]

Referring to FIG. 3 and FIG. 6 simultaneously, similarly, as seen from FIG. 3, the second compression mode (step S240) includes the following steps: sensing the sensing point having the largest sensing amount in the sensing frame as the sensing reference point P0 to sense The reference point P0 determines the first area SR, and the first area SR includes the sensing reference point P0 and a plurality of sensing points P1~P8 adjacent thereto, wherein the sensing data is sensing data of each sensing point in the sensing frame at different time points ( step S242). The coordinates of the sensing points P0 to P8 in the first region SR and the coordinates of the sensing reference point P0 are compressed into the second packet data PK2, and the second packet data PK2 is transmitted to the processing unit (step S244). It should be noted that the steps of the embodiment of FIG. 3 are only for convenience of description, and the embodiments of the present invention do not use the steps of the steps as a limitation of implementing various embodiments of the present invention. Each step will be described in more detail below to better understand the disclosure.

In step S242, when the controller 120 finds the sensing point having the maximum sensing amount, the controller 120 uses the sensing point having the largest sensing amount as the sensing reference point P0, and further defines the first centering on the sensing reference point P0. The area SR, wherein the first area SR is as shown in FIG. 6, which includes the sensing reference point P0 and a plurality of sensing points P1~P8 adjacent thereto, and includes the first area SR of the nine sensing points, which only For the sake of convenience, the present embodiment is not limited to the nine sensing points disclosed in the embodiment. For example, the first region SR may also be composed of 25 sensing points. Compared with the first compression mode (lossy compression method) in step S220, the second compression mode (lossless compression method) of the embodiment processes less data, and thus is suitable for the touch device 600 to be in a single touch. Control situation. Thereafter, the process proceeds to step S244.

It is worth mentioning that, in another embodiment, the disclosure uses the concept of continuous image to subtract the sensing data DS1 obtained at successive time points to obtain a sensing difference data, wherein the sensing difference data is also Can be used as one of the sensing materials. In another embodiment, the disclosure can subtract the sensing data in the two first regions in the images of successive time points to obtain the sensing difference data.

In step S244, the controller 120 encodes the sensing amount of each sensing point P1~P8 in the first area SR and the coordinate of the sensing reference point P0 to be compressed into the second packet data PK2, and the second packet data PK2. The processing unit 130 is transferred to the host side for data processing, thereby causing the processing unit 130 to perform operations such as data processing operations, thereby reducing the load of the integrated circuit and reducing the size thereof, thereby effectively reducing the cost of the integrated circuit. In an embodiment, the controller 120 passes through step S220. The quantization function described is a data processing operation for quantizing the amount of inductance of each of the sensing points P0 to P8 in the first region SR.

Thereafter, after the processing unit 130 receives the second packet data PK2, a second inverse conversion is performed. The second inverse conversion is to decompress the second packet data PK2 into the sensing data DS1, so that the processing unit 130 performs reverse data processing.

It is to be noted that, in an embodiment, the touch devices 100, 400, and 600 may be a capacitive touch device, and the sensing data DS1 detected or sensed through the sensing module 112 is capacitive. Sensing information.

[Possible effects of the examples]

In summary, the touch device and the data processing method thereof according to the embodiments of the present invention determine the data processing method by determining the number of touch objects, when the number of touch objects is greater than one (ie, multi-touch) The touch device performs a lossy compression method to reduce the amount of data. On the other hand, when the number of touch objects is equal to one time (ie, single touch), the touch device performs a lossless compression method. Accordingly, embodiments of the present invention can effectively reduce the cost of the integrated circuit and increase the processing speed and can implement some highly complex algorithms.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

S205, S210, S220, S230, S240‧‧‧ steps

S222, S224‧‧‧ steps

S242, S244‧‧‧ steps

Claims (34)

A data processing method for a touch device includes the steps of: capturing at least one sensing data of the touch device; converting the sensing data into a quantized data through a quantization function; and encoding the quantized data and compressing the data into one Encapsulating the data, and transmitting the packet data to a processing unit at a host end to calculate a touch coordinate; wherein the quantization function is a staircase curve and the sensing data is converted into the quantized data through the quantization function. The data processing method of claim 1, wherein the quantization function determines a curve order according to a first quantization parameter, and determines a target area according to a second quantization parameter, where the target area corresponds to the quantization function The area where the slope of the curve rises rapidly. The data processing method of claim 2, wherein the step of converting the sensing data into the quantized data by using the quantization function, the sensing data in the target region is converted into a quantization order according to the quantization function The conversion resolution is higher than the conversion resolution of the sensing data outside the target area converted to the quantization order according to the quantization function. The data processing method of claim 2, wherein the first quantization parameter and the second quantization parameter are set according to a type or a number of corresponding objects sensed by the touch device, wherein the first quantization parameter and the The ratio between the second quantization parameters determines the quantization characteristic of the quantization function. The data processing method of claim 1, wherein the quantized data obtained by the sensing data at successive time points is subtracted to obtain a quantized difference data, and the quantized difference data is a kind of the quantitative data. . The data processing method of claim 1, wherein the processing unit receives an inverse conversion after receiving the packet data, the inverse conversion is used to decode the packet data to be decompressed into the quantized data, and is transmitted through the processing unit. a quantized inverse function The quantized data is converted back to the sensed data, wherein the quantized inverse function is an inverse function of the quantized function. The data processing method of claim 1, wherein the touch device is a capacitive touch device, and the sensing data is a capacitive sensing information. A data processing method for a touch device includes the following steps: capturing at least one sensing material of the touch device, the sensing data includes at least one sensing frame; and the sensing point having the largest sensing amount in the sensing frame is used as a sensing reference point, wherein the sensing reference point determines a first region, the first region includes the sensing reference point and a plurality of sensing points adjacent thereto; and encoding the sensing amount of each sensing point in the first region The sensing amount and coordinates of the sensing reference point are compressed into a packet data, and the packet data is transmitted to the processing unit at a host end. The data processing method of claim 8, wherein the sensing data obtained at successive time points is subtracted to obtain a sensing difference data, and the sensing difference data is one of the sensing materials. The data processing method of claim 8, wherein the sensing data obtained by the first region at successive time points is subtracted to obtain a sensing difference data, and the sensing difference data is a kind of the sensing data. . The data processing method of claim 9, wherein the processing unit receives the packet data for performing an inverse conversion, and the inverse conversion is to decode the packet data to decompress the sensing data, thereby allowing the processing unit to perform Reverse data processing. The data processing method of claim 9, wherein the touch device is a capacitive touch device, and the sensing data is a capacitive sensing information. A data processing method for a touch device includes the steps of: capturing at least one sensing data of the touch device; determining a number of touch objects on the touch device; and when the number of touch objects is greater than one, performing a first compression mode, wherein the The first compression mode includes the following steps: converting the sensing data into a quantized data through a quantization function; and encoding the quantized data into a first packet data, and transmitting the first packet data to a host a processing unit for calculating a touch coordinate; and when the number of touch objects is not equal to N, performing a second compression mode, wherein the sensing data includes at least one sensing frame, and the second compression mode includes: The sensing point having the largest sensing amount in the sensing frame serves as a sensing reference point, and the sensing reference point determines a first area, where the first area includes the sensing reference point and a plurality of sensing points adjacent thereto; The sensing quantity of each sensing point in an area and the sensing quantity of the sensing reference point and the processing unit coordinated to the host end; and the sensing quantity of each sensing point in the first area and the sensing of the sensing reference point The quantity and coordinates are compressed into a second packet data, and the second packet data is transmitted to the processing unit. The data processing method of claim 13, wherein the quantization function determines a curve order according to a first quantization parameter, and determines a target area according to a second quantization parameter, where the target area corresponds to the quantization function An area in which the slope of the curve rises rapidly, wherein the quantization function is a staircase curve and the sensing data is converted into the quantized data by the quantization function. The data processing method of claim 13, wherein the step of converting the sensing data into the quantized data by using the quantization function, converting the sensing data into a quantization order according to the quantization function in the target area The resolution is higher than the conversion resolution of the sensing data converted to the quantization order according to the quantization function outside the target area. The data processing method of claim 14, wherein the first quantization parameter and the The second quantization parameter is set according to the type or number of corresponding objects sensed by the touch device, wherein a ratio between the first quantization parameter and the second quantization parameter determines a quantization characteristic of the curve filter. The data processing method of claim 14, wherein the quantized data obtained by the sensing data at successive time points is subtracted to obtain a quantized difference data, and the quantized difference data is a kind of the quantized data. . The data processing method of claim 13, wherein the processing unit receives the first packet data for performing a first inverse transform, and the first inverse transform is used to decode the first packet data to decompress the quantized data. And converting the quantized data back to the sensing data through a quantization inverse function of the processing unit to perform inverse data processing, wherein the quantization inverse function is an inverse function of the quantization function. The data processing method of claim 13, wherein the sensing data obtained at successive time points is subtracted to obtain a sensing difference data, and the sensing difference data is one of the sensing materials. The data processing method of claim 13, wherein the sensing data obtained by the first region at successive time points is subtracted to obtain a sensing difference data, and the sensing difference data is a kind of the sensing data. . The data processing method of claim 13, wherein the processing unit receives the second packet data for performing a second inverse conversion, and the second inverse conversion is to decode the second packet data to decompress the sensing data. The data processing method of claim 13, wherein the touch device is a capacitive touch device, and the sensing data is a capacitive sensing information. A touch device includes: a touch panel having a side; an inductive module having a plurality of sensing lines, wherein the sensing line is disposed on the side of the touch panel, and the sensing module is electrically connected to the sensing module a touch panel; a controller electrically connected to the sensing module, wherein the controller is configured to perform a data processing method; a processing unit is electrically connected to the controller, wherein the data processing method comprises the following steps: determining the number of touch objects on the touch device; when the number of touch objects is greater than one, the controller performs a first The compression mode; and when the number of the touch objects is not more than one, the controller performs a second compression mode. The touch device of claim 23, wherein the controller further comprises: a curve filter having a quantization function, wherein the first compression mode is performed by the curve filter when the number of touch objects is greater than one, and When the number of the touch objects is not more than one, the curve filter performs a second compression mode. The touch device of claim 24, wherein the performing the first compression mode comprises: capturing at least one sensing data of the touch device; and converting the sensing data into a quantized data through the curve filter; And encoding the quantized data and compressing it into a first packet data, and transmitting the first packet data to a processing unit at a host end, wherein the quantization function is a ladder curve and the sensing data is converted into the Quantitative data. The touch device of claim 24, wherein the second compression mode comprises: capturing at least one sensing material of the touch device, the sensing data comprising at least one sensing frame; The sensing point of the maximum sensing quantity is used as a sensing reference point, and the sensing reference point determines a first area, the first area includes the sensing reference point and a plurality of sensing points adjacent thereto; and each of the first area is transmitted The amount of sensing of the sensing point and the sense of the sensing reference point And measuring a coordinate to a processing unit of a host end; and encoding the sensing quantity of each sensing point in the first area and the sensing quantity and coordinates of the sensing reference point to be compressed into a second packet data, and the first The two packets of data are transmitted to the processing unit. The touch device of claim 24, wherein the quantization function determines a curve order according to a first quantization parameter, and determines a target region according to a second quantization parameter, where the target region corresponds to the quantization function The area where the slope of the curve rises rapidly. The touch device of claim 24, wherein the step of converting the sensing data into the quantized data through the curve filter, wherein the sensing data is converted into a quantization order according to the quantization function in the target region The conversion resolution is higher than the conversion resolution of the sensing data converted to the quantization order according to the quantization function outside the target area. The touch device of claim 24, wherein the first quantization parameter and the second quantization parameter are set according to a type or a number of corresponding objects sensed by the touch device, wherein the first quantization parameter is The ratio between the second quantization parameters determines the quantization characteristic of the curve filter. The touch device of claim 24, wherein the quantized data obtained by the sensing data at successive time points is subtracted to obtain a quantized difference data, and the quantized difference data is a kind of the quantized data. . The touch device of claim 24, wherein the processing unit receives the first packet data for performing a first inverse conversion, and the first inverse conversion is to decode the first packet data to decompress the quantized data. And converting the quantized data back to the sensing data through a quantization inverse function of the processing unit, wherein the quantization inverse function is an inverse function of the quantization function. The touch device of claim 25, wherein the sensing data obtained at successive time points is subtracted to obtain a sensing difference data, and the sensing difference data is one of the sensing materials. The touch device of claim 25, wherein the processing unit receives the second packet data for performing a second inverse conversion, and the second inverse conversion is to decode the second packet data to decompress the sensing data. The touch device of claim 23, wherein the touch device is a capacitive touch device, and the sensing data is a capacitive sensing information.