CN103186263A - Point reporting device and point reporting method - Google Patents

Abstract

A point reporting device and a point reporting method are provided, the point reporting device is suitable for electrically connecting a touch control panel provided with a plurality of induction modules so as to process a plurality of sensing data from the induction modules respectively, and the point reporting device comprises: a synthesis unit, which receives the sensing data at intervals of first time and obtains corresponding synthesis signals according to a plurality of sensing data continuously received from each sensing module; a coordinate determining unit, which receives the composite signals of the sensing modules at intervals of a second time and determines a click coordinate related to the touched position of the touch pad according to the composite signals; wherein the second time is K times the first time, and K is an integer greater than 1.

Description

Reporting device and reporting method

technical field

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

Background technique

After the touch panel is pressed, the plurality of sensing modules disposed on it will present corresponding sensing intensities for the reporting device to estimate which coordinate on the touch panel is clicked. Referring to Figure 1, as time goes by, the sensing intensity of the sensing module will have some changes, so the reporting device will process the current sensing intensity at regular intervals, and use finite impulse response (finite impulse response, FIR) or infinite impulse The response (infinite impulse response, IIR) filtering method adjusts the current sensing intensity according to the previously processed sensing intensity as a reference for estimating the coordinates of the click. Wherein, the frequency of processing the sensing intensity is equal to the generation frequency of the clicked coordinates.

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

Contents of the invention

The object of the present invention is to provide a point reporting device and a point reporting method capable of suppressing disturbance noise interference.

The point reporting method of the present invention is suitable for a touch panel provided with multiple sensing modules, to process multiple sensing data from these sensing modules respectively, comprising the following steps: (A) Assembling a synthesis unit, Receive these sensing data for a first period of time, and then obtain a corresponding composite signal according to the multiple sensing data received continuously from each sensing module; (B) assemble a coordinate determination unit, every second period of time , receive the combined signals of these sensing modules and determine a click coordinate relative to the touched position of the touch panel; wherein, the second time is K times the first time, and K is greater than 1 integer.

In step (A), the number of sensing data referenced by each sensing module for generating the corresponding composite signal=K.

Each sensing data has a periodic interference noise component, and in step (A), the received sensing data are summed for each sensing module within a period corresponding to the interference noise period to generate a corresponding composite signal.

In step (A), the sensing data are received at intervals of the first time, and multiple pieces of sensing data received continuously from each sensing module are summed to obtain a corresponding composite signal.

The reporting device of the present invention is suitable for electrically connecting a touch panel provided with a plurality of sensing modules, so as to process a plurality of sensing data respectively from these sensing modules, including: a synthesizing unit, receiving at intervals the first time These sensing data, and then obtain a corresponding composite signal according to multiple pieces of sensing data continuously received from each sensing module; a coordinate determination unit receives the composite signals of these sensing modules at intervals of a second time and A click coordinate relative to the touched position of the touch panel is determined; wherein, the second time is K times the first time, and K is an integer greater than 1.

The number of sensing data referenced by the synthesis unit for each sensing module to generate a corresponding synthesis signal=K.

Each sensing data has a periodic interference noise component, and the synthesis unit sums the received sensing data for each sensing module within a period of time equivalent to the interference noise period to generate a corresponding synthesis signal.

The synthesizing unit receives the sensing data every first time, and sums up multiple pieces of sensing data continuously received from each sensing module to obtain a corresponding synthesizing signal.

The beneficial effect of the present invention is that: the synthesis unit sums up multiple pieces of continuous sensing data, so that the signal-to-noise ratio of the synthesized signal is improved, the estimated point selection coordinates have higher accuracy, and the interference of interference noise is effectively suppressed.

Description of drawings

FIG. 1 is a schematic diagram illustrating that the frequency of processing sensing intensity in the prior art is equal to the generation frequency of selected coordinates;

Fig. 2 is the block diagram that comprises the display system of reporting device;

FIG. 3 is a simulated diagram illustrating sensed data with impulsive disturbances;

FIG. 4 is a schematic diagram illustrating that the frequency of processing sensing data in this embodiment is higher than the generation frequency of clicked coordinates;

Figure 5 is a simulated diagram illustrating a composite signal with impulsive interference;

6 is a simulation diagram illustrating sensing data when the touch panel is pressed;

FIG. 7 is a simulation diagram illustrating a composite signal when the touch panel is pressed.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the present invention is not limited to the following specific embodiments. Those skilled in the art should understand the present invention from the spirit embodied in the following embodiments, and each technical term can be optimized based on the spirit of the present invention. broad understanding. The same or similar components in the figures are denoted by the same reference numerals.

Referring to Fig. 2, the reporting device 22 of a preferred embodiment of the present invention is suitable for a display system 100, and this display system 100 comprises a touch panel 1, a controller 2 and a processor 3 electrically connected in sequence, and The touch panel 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 representing the sensing intensity to the receiving unit 21 for the reporting device 22 to calculate which point coordinate on the display surface of the touch panel 1 is touched. When receiving a reporting request from the processor 3, the reporting device 22 will provide the selected coordinates to the processor 3 for subsequent operations.

Those skilled in the field of the present invention know that when the user does not press the touchpad 1 , the sensing module 11 will still send non-zero sensing data due to interference noise, as shown in FIG. 3 . And as time goes by, the sensing data will have a small amplitude change. If there is sudden interference (such as electrostatic discharge), the sensing data will have a situation of sharp rise and sharp drop, such as pulse interference. In order to reduce the impact of interference noise on the touch operation, this example intends to use a higher frequency than the "click coordinate generation frequency" to process the sensing data of the sensing module 11, so that the click coordinates are closer to the operation. expect.

Referring back to FIG. 2 , the reporting device 22 has a synthesis unit 23 , a coordinate determining unit 24 and a storage unit 25 , and the above-mentioned units 23-25 will execute the reporting method of the preferred embodiment of the present invention, which is described in detail as follows. The synthesizing unit 23 receives sensing data for each sensing module 11 at intervals of a first time and sums up the last D (D>1) pieces of sensing data continuously received to obtain a synthesizing signal. The synthesis unit 23 stores the received sensing data and the obtained synthesized signal into the storage unit 25 . The coordinate determination unit 24 obtains the synthesized signals of all the sensing modules 11 from the storage unit 25 at intervals of a second time, and determines a click coordinate accordingly. Wherein, the second time is K times the first time, and K is an integer greater than 1, that is, the "frequency of processing sensing data" is higher than the "frequency of generating click coordinates".

When K=D=10, the timing relationship of the sensing data, the synthesized signal and the selected coordinates is shown in Fig. 4 . In this case, if the sensing data fluctuates as shown in FIG. 3 due to the interference of interference noise, then summing up the latest continuous D=10 pieces of sensing data will obtain a composite signal as shown in FIG. 5 . For example: at time t=10, the composite signal is the sum of the sensing data of t=1～10; at time t=11, the composite signal is the sum of the sensing data of t=2～11; at time t=12, the composite signal is The sum of the sensing data of t=3～12, . . . Comparing Fig. 3 and Fig. 5, it can be found that after summing up the sensing data, the pulse interference phenomenon can be effectively suppressed.

Furthermore, if the sensing data fluctuates as shown in FIG. 6 due to two presses on the touch panel 1 , then summing up the most recent D=10 pieces of sensing data will result in a composite signal as shown in FIG. 7 . Clearly, the composite signal still retains the high-amplitude character of the compression.

The above is because according to the central limit theorem, the interference noise preferably exhibits a Gaussian distribution, so the more interference noise is sampled, the closer the average value will be to a certain value, and the standard deviation will be closer to another certain value. Therefore, summing up multiple pieces of sensing data will only enhance the signal component, but will not increase the interference noise component, so the signal-to-noise ratio of the synthesized signal will be better than that of a single piece of sensing data. Moreover, the larger D is, the better the signal-to-noise ratio of the synthesized signal is, and the more the selected coordinates are related to the signal components of the sensing data, so as to be more accurate.

It is worth noting that in this example, the coordinates are estimated after summing up the sensing data of the D pens. Compared with estimating the coordinates by taking the integer bit average of the sensing data of the D pens, the coordinate accuracy of this example is better. Moreover, the storage unit 25 usually stores a sum of sensing data or a synthesized signal in a storage space of the same size, so the storage space required by the storage unit 25 is only related to the number of signals to be stored, not to the number of signals to be stored. Store the signal size. That is to say, the storage space consumed is the same for a composite signal obtained by summing up the sensing data of the D pen, or for a signal obtained by averaging the integer bits of the sensing data of the D pen. Further, this example uses The summed composite signal can bring better coordinate accuracy, thus taking into account high coordinate accuracy and effective use of storage space.

In addition, although Figures 4, 5, and 7 illustrate the case of K=D=10, in other aspects, K=D does not need to be satisfied, and the values of K and D need not be limited thereto. Preferably, in order to compensate for the 50Hz low-frequency sine wave interference noise component (that is, the periodic interference noise component) carried by the AC power supply, it is usually set to D>K and the continuous D-pen sensing data used should preferably span 1/50Hz of time , so that the low-frequency sine wave interference noise component of the D pen sensing data can be canceled out in the summing process.

In this example, the processing frequency of the sensing data is equal to the generating frequency of the synthesized signal, so the current synthesized signal refers to the latest received sensing data, and discards the oldest sensed data referred to by the previous synthesized signal. However, in another form, the processing frequency of the sensing data can also be increased by N times, and the composite signal can be obtained by using the sum of the latest continuous D×N sensing data, so that the current composite signal will be added with reference to the latest received The N pieces of sensing data, and the N pieces of the oldest sensing data referenced by the previous synthesized signal are discarded.

Finally, it should be noted that since the coordinate determining unit 24 only receives the combined signal every second time, in another implementation, the combining unit 23 may also sum up the D pen sensing data every second time.

Moreover, the touch panel 1 of this 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.

To sum up, in the above-mentioned preferred embodiment, the synthesis unit 23 sums up a plurality of continuous sensing data, so that the signal-to-noise ratio of the synthesized signal is improved so that the estimated coordinates of the selected point have a higher accuracy, which obviously suppresses the Disturbing noise interferes, so the purpose of the present invention can really be achieved.

It should be understood that after reading the above teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (8)

1. a kind of point reporting method is applicable to a touch panel that is provided with a plurality of sensing modules, to process a plurality of sensing data respectively from described sensing modules, it is characterized in that, comprises the following steps: (A) Assembling a synthesizing unit, receiving the sensing data at intervals of the first time, and then obtaining a corresponding synthesizing signal according to multiple sensing data continuously received from each sensing module; (B) Assembling a coordinate determining unit, receiving the synthesized signal of the sensing module at intervals of a second time and determining a click coordinate relative 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. 2. The point reporting method according to claim 1, wherein in step (A), the number of sensing data referenced by each sensing module for generating the corresponding composite signal=K. 3. The reporting point method as claimed in claim 1, characterized in that, each sensing data has a periodic disturbance noise component, and in step (A), in a section of time equivalent to the disturbance noise cycle, for each The sensing module sums the received sensing data to generate a corresponding composite signal. 4. The reporting point method according to claim 1, wherein in step (A), the sensing data is received at intervals of the first time, and the multiple data received continuously from each sensing module The sensing data are summed to obtain a corresponding composite signal. 5. A reporting device, suitable for electrically connecting a touch panel that is provided with a plurality of sensing modules, to process a plurality of sensing data from the sensing modules respectively, it is characterized in that, comprising: A synthesizing unit receives the sensing data at intervals of the first time, and then obtains a corresponding synthesizing signal according to multiple pieces of sensing data continuously received from each sensing module; A coordinate determination unit receives the synthesized signal of the sensing module at intervals of a second time to determine a click coordinate relative 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. 6 . The point reporting device according to claim 5 , wherein the synthesizing unit uses the number of sensing data referenced by each sensing module to generate a corresponding synthesizing signal=K. 7. The device for reporting points as claimed in claim 5, wherein each sensed data has a periodic disturbance noise component, and the synthesizing unit sums up each induction module in a period of time equivalent to the disturbance noise period. The received sensing data is used to generate a corresponding composite signal. 8. The point reporting device as claimed in claim 5, characterized in that: the synthesis unit receives the sensing data at intervals of the first time, and performs a plurality of sensing data received continuously from each sensing module sum to obtain the corresponding composite signal.

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