TW201324246A - Point reporting device and point reporting method - Google Patents

Abstract

There is provided a point reporting device, which is suitable for electrically connecting to a touch panel having a plurality of sensing modules for processing plural items of sensing data generated from the sensing modules respectively. The point reporting device includes: a synthesizing unit for receiving the sensing data per first time and using the plural items of sensing data continuously received from each sensing module to obtain a corresponding synthesized signal; and a coordinate determination unit for receiving the synthesized signal of the sensing modules per second time so as to determine a selected coordinate corresponding to the touched position of the touch panel, wherein the second time is K times of the first time and K is an integer greater than one. In addition, a point reporting method is also disclosed.

Description

Reporting device and reporting method

The invention relates to a reporting device, in particular to a reporting device suitable for a touch panel.

After the touchpad is pressed, the plurality of sensing modules disposed thereon exhibit corresponding sensing intensities, so that the reporting device can estimate which one of the touchpads is clicked. Referring to Figure 1, over time, the sensing intensity of the sensing module will change, so the reporting device will process the current sensing intensity at intervals and use FIR (finite impulse response) or IIR. The (infinite impulse response) filtering method adjusts the current sensing intensity according to the previously processed sensing intensity as a reference for estimating the selected coordinates. Wherein, the frequency of processing the sensing intensity is equal to the frequency of generating the selected coordinates.

However, when using the touchpad, it is inevitable that there will be some sudden interference, such as electrostatic discharge. If these disturbances happen to occur at the point in time when the reporting device processes the sensing intensity, then the estimated point coordinates may not be what the user desires.

Accordingly, it is an object of the present invention to provide a reporting device and a reporting method capable of suppressing noise interference.

Therefore, the reporting device of the present invention is adapted to electrically connect a touch panel provided with a plurality of sensing modules to process a plurality of sensing materials respectively from the sensing modules, including: a synthesizing unit, every other one Receiving the sensing data at a first time, and obtaining a corresponding composite signal according to the plurality of sensing materials continuously received from each sensing module; a standard determining unit receiving the sensing every second time The composite signal of the module determines a point-selection coordinate related to the touched position of the touch panel; wherein the second time is K times the first time, and K is an integer greater than 1.

The reporting method of the present invention is applicable to a touch panel provided with a plurality of sensing modules for processing a plurality of sensing materials respectively from the sensing modules, comprising the following steps: (A) by using a synthesizing unit Receiving the sensing data every other first time, and obtaining a corresponding composite signal according to the plurality of sensing materials continuously received from each sensing module; (B) by a standard determining unit, every a second time, receiving the composite signal of the sensing modules and determining a point-selection coordinate related to the touched position of the touch panel; wherein the second time is K times of the first time, K is an integer greater than one.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, a preferred embodiment of the reporting device 22 of the present invention is applicable to a display system 100. The display system 100 includes a touch panel 1, a controller 2, and a processor 3 that are sequentially electrically connected. The control board 1 is provided with a plurality of sensing modules 11, and the controller 2 includes a receiving unit 21 and the reporting device 22.

Each sensing module 11 of the touch panel 1 sends a sensing data representative of the sensing intensity to the receiving unit 21, so that the reporting device 22 calculates which point on the display surface of the touch panel 1 is selected to be touched. And the reporting device 22, when receiving a request for a request from the processor 3, provides the selected coordinate to the processor 3 for subsequent operations.

It is known to those skilled in the art that in the case where the user does not press the touch panel 1, the sensing module 11 still sends non-zero sensing data due to noise, as shown in FIG. And as time passes, the sensed data will have a small amplitude change. If there is sudden interference (such as electrostatic discharge), the sensed data will have a sharp rise and fall, such as pulse interference. In order to reduce the influence of noise interference on the touch operation, this example intends to use a higher frequency than the "click-selected coordinate generation frequency" to process the sensing data of the sensing module 11 so that the clicked coordinates are closer to the operational expectation.

Referring back to FIG. 2, the reporting device 22 has a synthesizing unit 23, a label determining unit 24, and a memory unit 25, and the units 23-25 perform the preferred embodiment of the reporting method of the present invention, as described in detail below. The synthesizing unit 23 receives the sensing data every other first time of each sensing module 11 and adds the D (D>1) pen sensing data continuously received recently to obtain a composite signal. And the synthesizing unit 23 stores the received sensing data and the obtained synthesized signal into the memory unit 25. The coordinate determining unit 24 obtains the composite signals of all the sensing modules 11 from the memory unit 25 every second time and determines a point selection coordinate. The second time is K times the first time, and K is an integer greater than 1, that is, "the frequency of processing the sensing data" is higher than the "frequency of the selected coordinates".

When K=D=10, the timing relationship of the sensing data, the composite signal and the selected coordinates is shown in Fig. 4. In this case, if the sensed data exhibits fluctuations as shown in FIG. 3 due to noise interference, then the total consecutive D=10 strokes of the sensed data will result in a composite signal as shown in FIG. For example: time t=10, the combined signal is t=1~10, and the total time is t=11, and the combined signal is t=2~11. The time is t=12, and the synthesized signal is The total of t=3~12 sensing data is added, .... Comparing Fig. 3 and Fig. 5, it can be found that the pulse interference phenomenon can be effectively suppressed after the sensing data is added.

Moreover, if the sensing data is subjected to the fluctuation of FIG. 6 due to the two touches of the touch panel 1, then the total continuous D=10 stroke sensing data will result in the composite signal as shown in FIG. Obviously, the composite signal still retains the high amplitude characteristics caused by the compression.

The above is because according to the central limit theorem, the noise is preferably Gaussian, so the more noise is sampled, the average value will approach a certain value, and the standard deviation will approach another value. Therefore, adding more than one sensing data will only strengthen the signal components, but will not improve the noise component, so the signal-to-noise ratio of the composite signal will be better than the signal-to-noise ratio of the single sensing data. Moreover, the larger D is, the better the signal-to-noise ratio of the synthesized signal is, and the more the point coordinates are related to the signal components of the sensing data, so as to be accurate.

It is worth noting that in this example, the D-sense sensing data is summed up to estimate the coordinates. Compared with the integer average of the D-sensing data, the coordinate is estimated. The seat standard accuracy of this example is better. . Moreover, the memory unit 25 usually stores a sensed data or a composite signal in the same size storage space, so the amount of storage space required by the memory unit 25 is only related to the number of signals to be stored, and there is no need to save Incoming signal size. That is to say, in the face of a composite signal obtained by summing the D-sense sensing data, or in the face of a signal obtained by taking the integer average of the D-sensing data, the storage space is the same, and further used in this example. The resulting composite signal results in better seat-standard accuracy, thus taking into account the high coordinate accuracy and efficient use of the storage space.

In addition, although FIGS. 4, 5, and 7 are the cases where K=D=10, in other aspects, it is not necessary to satisfy K=D, and the K and D values are not limited thereto. Preferably, in order to compensate for the 50 Hz low frequency sine wave noise component (ie, periodic noise component) entrained by the AC power source, D>K is usually used and the continuous D pen sensing data used is preferably 1/50 Hz. Therefore, the low-frequency sine wave noise component of the D-sensing data can be offset in the summation process.

In this example, the processing frequency of the sensing data is equal to the frequency of the synthesized signal, so the synthesized signal will refer to the newly received sensing data and discard the oldest sensing data referenced by the previous composite signal. However, in another aspect, the processing frequency of the sensing data can be increased by N times, and the synthesized signal is obtained by summing the recent continuous D×N pen sensing data, so that the current synthesized signal will be newly added to the newly received reference. N pen sensing data, and discarding the N oldest sensing data referenced by the previous composite signal.

Finally, it should be noted that since the coordinate decision unit 24 receives the composite signal every second time, in another embodiment, the synthesizing unit 23 may also add the D-pen sensing data every second time.

Moreover, the touch panel 1 of the embodiment may be a capacitive touch panel, a resistive touch panel, an optical touch panel, an acoustic wave touch panel, an electromagnetic touch panel, or other forms of touch panels. Wait.

In summary, in the foregoing preferred embodiment, the synthesizing unit 23 adds a plurality of consecutive sensing data to improve the signal-to-noise ratio of the synthesized signal, so that the estimated point-selected coordinates have higher precision and significantly inhibit the miscellaneous The interference is achieved, so it is indeed possible to achieve the object of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

100. . . display system

1. . . touchpad

11. . . Sensor module

2. . . Controller

twenty one. . . Receiving unit

twenty two. . . Reporting device

twenty three. . . Synthetic unit

twenty four. . . Coordinate decision unit

25. . . Memory unit

3. . . processor

1 is a schematic diagram showing the frequency at which the conventional technique processes the sensing intensity equal to the frequency at which the selected coordinates are selected;

Figure 2 is a block diagram showing a display system including a reporting device;

Figure 3 is a simulation diagram illustrating sensing data with pulse interference;

4 is a schematic diagram showing the frequency at which the sensing data is processed in this embodiment is higher than the frequency at which the selected coordinates are selected;

Figure 5 is a simulation diagram illustrating a composite signal with pulse interference;

6 is a simulation diagram illustrating sensing data when the touch panel is under pressure; and

Fig. 7 is a simulation diagram showing a composite signal when the touch panel is pressed.

100. . . display system

1. . . touchpad

11. . . Sensor module

2. . . Controller

twenty one. . . Receiving unit

twenty two. . . Reporting device

twenty three. . . Synthetic unit

twenty four. . . Coordinate decision unit

25. . . Memory unit

3. . . processor

Claims (8)

A reporting method is applicable to a touchpad provided with a plurality of sensing modules for processing a plurality of sensing materials respectively from the sensing modules, comprising the following steps: (A) by a synthesizing unit, each Receiving the sensing data at a first time, and then obtaining a corresponding composite signal according to the plurality of sensing materials continuously received from each sensing module; (B) using a standard determining unit, every other first Two times, receiving the composite signal of the sensing modules and determining a point-selection coordinate related to the touched position of the touch panel; wherein the second time is K times of the first time, K is An integer greater than one. According to the reporting method of claim 1, wherein in step (A), the number of sensing data for each sensing module is used to generate a corresponding composite signal=K. According to the reporting method described in claim 1, the sensing data has a periodic noise component, wherein in step (A), for each period of time corresponding to the noise period, for each sensing The module summation receives the sensing data to generate a corresponding composite signal. According to the reporting method of claim 1, wherein in step (A), the sensing data is received every other first time, and multiple penets are continuously received from each sensing module. The sensing data is summed to obtain a corresponding composite signal. A reporting device is configured to electrically connect a touchpad provided with a plurality of sensing modules to process a plurality of sensing materials respectively from the sensing modules, comprising: a synthesizing unit, every other first time Receiving the sensing data, and obtaining a corresponding composite signal according to the plurality of sensing materials continuously received from each sensing module; a standard determining unit receiving the sensing modules every second time Synthesizing the signal and determining a point-selection coordinate associated with the touched position of the touchpad; wherein the second time is K times the first time, and K is an integer greater than one. The reporting device according to claim 5, wherein the synthesizing unit is configured to generate the number of sensing data=K corresponding to the corresponding composite signal. According to the reporting device described in claim 5, each sensing data has a periodic noise component, wherein the combining unit adds up to each sensing module in a period corresponding to a noise period. The sensed data is received to generate a corresponding composite signal. According to the reporting device of claim 5, the synthesizing unit receives the sensing data every other first time, and performs multiple sensing materials continuously received from each sensing module. Add the total to get the corresponding composite signal.