TWI457910B - Display device and control method thereof - Google Patents

Description

Display device and control method thereof

The present invention relates to a display device, and more particularly to a display device having two panels.

Because the image tube has the characteristics of excellent image quality and low price, it has been adopted as a display for televisions and computers. However, with the advancement of technology, new flat-panel displays have been developed. The main advantage of a flat panel display is that when the flat panel display has a large size display panel, the total volume of the flat panel display does not change significantly.

In order to improve the convenience of the flat panel display, a touch panel is usually disposed on the surface of the flat display, so that the user can click on the screen and options presented by the display. However, when the transmission line in the touch panel is scanned, it is susceptible to the voltage level of the scanning line in the original display panel of the flat panel display. When the voltage level on a certain transmission line is always interfered by the voltage level on the scan line, it is easy to cause misjudgment, and the interference is regarded as an external force touch.

The invention provides a display device comprising a first panel, a first control unit, a second panel and a second control unit. The first panel has a plurality of scan lines. The first control unit turns on the scan line according to a first turn-on sequence. The second panel has a plurality of transmission lines. The second control unit turns on the transmission line according to a second opening sequence. The first opening sequence is different from the second opening sequence.

The invention further provides a control method suitable for a display device. The display device includes a first panel and a second panel. The first panel has a plurality of scan lines. The scan lines are turned on in a first turn-on sequence. The second panel has a plurality of transmission lines. The control method of the present invention includes: planning a memory space according to a preset resolution; opening a transmission line by using a second opening sequence, wherein the second opening sequence is different from the first opening sequence; generating a complex sense according to the opening state of the transmission line Measuring the signal; and storing the sensing signal in the memory space according to the second opening sequence.

In order to make the features and advantages of the present invention more comprehensible, the preferred embodiments are described below, and are described in detail with reference to the accompanying drawings.

Figure 1 is a schematic diagram of one of the display devices of the present invention. As shown, the display device 100 includes panels 110, 120, control units 113 and 122. The invention does not limit the type of display device 100. In a possible embodiment, the display device 100 is a PDA, a cellular phone, a digital camera, a television, a global positioning system (GPS), a vehicle display, and an aviation device. A display, a digital photo frame, a laptop, or a desktop computer.

The panel 110 has a plurality of scan lines 111. The invention does not limit the type of panel 110. As long as the panel capable of presenting an image can be used as the panel 110. In a possible embodiment, the panel 110 is a self-illuminating panel (such as a plasma panel or an OLED panel) or a non-self-illuminating panel (such as a liquid crystal panel).

The control unit 113 turns on the scan line 111 according to a first turn-on sequence. It is used to make the panel 110 present an image. In the present embodiment, the control unit 113 is disposed in the panel 110. The present invention does not limit the internal architecture of the control unit 113. As long as the circuit structure capable of causing the panel 110 to present an image can be used as the control unit 113.

FIG. 2 is a possible internal architecture of panel 110. In the embodiment, the panel 110 includes a plurality of scan lines 111, a plurality of data lines 112, a control unit 113, and a plurality of pixels PIX. In the present embodiment, the scan lines 111 extend in a horizontal direction, and the data lines 112 extend in a vertical direction, wherein the scan lines 111 are perpendicular to the data lines 112.

The control unit 113 turns on the scan line 111 to turn on the pixel PIX according to a first turn-on sequence. In a possible embodiment, the control unit 113 provides a scan signal to the scan line 111 for turning on the scan line 111 according to the first turn-on sequence. In another possible embodiment, the control unit 113 turns on the scan line 111 according to other specific sequences, such as turning on the odd scan lines first and then turning on the even scan lines.

In addition, the control unit 113 transmits a data signal to the pixel PIX through the data line 112. The pixel PIX exhibits a corresponding brightness according to the data signal. In this embodiment, the control unit 113 includes a timing controller (TCON) 114, a gate driver 115, and a source driver 116.

The timing controller 114 generates control signals S _C1 , S _C2 based on an external video signal S _IM . The gate driver 115 supplies a plurality of scan signals to the scan lines 111 in a first turn-on sequence according to the control signal S _C1 , and turns on the pixels PIX through the scan lines 111. The source driver 116 provides a plurality of data signals according to the control signal S _C2 and transmits the data signals to the pixels PIX through the data lines 112. The pixel PIX receives the corresponding data signal according to the scan signal, and then displays the corresponding brightness according to the data signal.

Referring to FIG. 1 , the panel 120 covers the panel 110 and has a plurality of transmission lines 121 . Each transmission line corresponds to or overlaps at least one scan line. In this embodiment, the panel 120 is a touch panel (TP). The invention does not limit the type of touch panel. For example, the touch panel can be a capacitive touch panel, a resistive touch panel, an in-cell touch panel, an optical touch panel, an acoustic wave touch panel, and an electromagnetic touch panel.

The control unit 122 turns on the transmission line 121 according to a second opening sequence. In this embodiment, the first opening sequence is different from the second opening sequence. In other words, the order in which the transmission lines 121 are turned on is different from the order in which the scanning lines 111 are turned on. For example, the control unit 113 sequentially turns on the scan line 111, and the control unit 122 turns on the transmission line 121 in sequence. In other embodiments, if the control unit 113 turns on the scan line 111 in sequence, the control unit 122 sequentially turns on the transmission line 121.

In addition, the present invention does not limit how the control unit 122 turns on the transmission line 121. In a possible embodiment, the purpose of turning on the transmission line 121 can be achieved by controlling the voltage level of the transmission line 121.

In a possible embodiment, the control unit 113 turns on the scan line 111 according to a first frequency, and the control unit 122 turns on the transmission line 121 according to a second frequency. The present invention is not limited to the relationship between the first and second frequencies. The first frequency can be greater than, equal to, or less than the second frequency. Since the order of turning on the transmission line 121 is different from the order of turning on the scanning line 111, even if the frequency of turning on the transmission line 121 is the same as the frequency of turning on the scanning line 111, the voltage level of the turned-on transmission line is not affected by the voltage of the turned-on scanning line. Level interference.

For example, when the first scan line in the scan line 111 is turned on, if the first transmission line in the transmission line 121 is also turned on, since the first transmission line overlaps the first scan line, the voltage level of the first transmission line will be It is interfered by the signal on the first scan line. However, since the order of opening of the transmission line 121 is different from the order of opening of the scanning line 111, the probability that the voltage level of the turned-on transmission line is affected by the voltage level of the turned-on scanning line can be reduced.

In addition, even if the turned-on transmission line overlaps the turned-on scan line, since the order in which the transfer lines are turned on is different from the turn-on sequence of the scan lines, the same transfer line is not always interfered with by the voltage level on the turned-on scan line. Since the voltage level of each transmission line may be interfered by the voltage level on the scan line, the voltage levels of each transmission line are similarly interfered, thereby homogenizing the noise interference on the transmission line.

FIG. 3 is a schematic diagram of one possible interior of panel 120. As shown, the panel 120 includes a plurality of transmission lines 121, a plurality of sensing areas SA, a control unit 122, and a plurality of reading lines 123. The transmission line 121 extends in the horizontal direction. The read line 123 extends in the vertical direction and interleaves the transmission line 121. In the present embodiment, the transmission line 121 extends in the same direction as the scanning line 111.

The sensing area SA is located where the transmission line 121 and the reading line 123 are interlaced. Depending on the different types of panels 120, the sensing regions SA have different circuit architectures. In a possible embodiment, the sensing area SA may have a sensor for detecting the level of the transmission line 121. In other embodiments, the sensing area SA does not have a sensor.

Taking a capacitive touch panel as an example, since the read line 123 is interlaced with the transmission line 121 and the insulation between the two, therefore, there is a generation of a sensing capacitance at the intersection of the read line 123 and the transmission line 121. When the user touches the sensing area with a finger or a stylus pen, the sensing capacitance value changes, that is, a sensing level that is read by the corresponding reading line 123 changes. According to the sensing level of the reading line 123, the corresponding position touched by the user can be pushed out.

In this embodiment, the control unit 122 first turns on the transmission line 121 in a second opening sequence. The read line 123 generates the sensing signals S _EN1 to S _ENn according to the on state of the transmission line 121. The control unit 122 determines whether to change to a third open sequence according to the sensing signals S _EN1 ~ S _ENn , and turns on the transmission line 121 again to receive a new sensing signal. In this embodiment, the control unit 122 can determine whether the noise interference on the transmission line 121 is uniform according to the sensing signals S _EN1 ~ S _ENn . Uniformly referred to herein refers to whether the noise interference on the transmission line 121 is the same, or all the transmission lines 121 may not be affected by the opening of the scanning line, or all the transmission lines 121 may be affected by the opening of the scanning line.

If the noise interference on the transmission line 121 is uneven (or different), the control unit 122 changes the transmission line 121 again in another opening sequence (ie, the third opening sequence) until the noise interference on the transmission line 121 is uniform. In this embodiment, the third opening sequence is different from the second opening sequence.

In this embodiment, the control unit 122 includes a memory module 124, a transmission interface 125, a micro control module 126, a sequence generator 127, a transmission switching circuit 128, and a read control circuit 129. The memory module 124 stores the sensing signals S _EN1 ~S _ENn . The transmission interface 125 is coupled between the memory module 124 and the micro control module 126 for data transmission between the memory module 124 and the micro control module 126. In other embodiments, the transmission interface 125 can be disposed in the memory module 124 or the micro control module 126.

The micro control module 126 divides a memory space 130 from the memory module 124 according to a preset resolution to store the sensing signals S _EN1 ~ S _ENn . Therefore, the preset resolution is related to the number of interlaced points of the transmission line 121 and the read line 123. When the number of interlaced points of the transmission line 121 and the read line 123 is large, the micro control module 126 divides a large memory space from the memory module 124. In a possible embodiment, the preset resolution is set in advance. In other embodiments, the micro control module 126 detects the number of interlaced points of the transmission line 121 and the read line 123, and generates the preset resolution according to the detection result.

The micro control module 126 reads the sequence generator 127 for learning a second open sequence. In a possible embodiment, after the micro-control module 126 enables the sequence generator 127, the sequence generator 127 generates an open sequence as the second open sequence. In another embodiment, the sequence generator 127 continues to generate an open sequence. Therefore, the order of opening read by the micro control module 126 is different at different times. In a possible embodiment, the sequence generator 127 is a random number generator, but is not intended to limit the invention.

The micro control module 126 generates a switching signal S _SW1 according to the read second opening sequence. The transmission switching circuit 128 turns on the transmission line 121 in accordance with the switching signal S _SW1 . In a possible embodiment, the transmission switching circuit 128 controls all of the transmission lines 121. In another possible embodiment, the transmission switching circuit 128 partition controls the transmission line 121. In other words, the transmission line 121 is divided into a plurality of groups, and the transmission switching circuit 128 sequentially or non-sequentially controls the transmission lines within the groups.

Figure 4 is a schematic diagram showing the possible opening sequence of one of the transmission lines. In the present embodiment, the micro control module 126 partitions the transmission line 121. In each zone, the micro control module 126 turns on the corresponding transmission line in the second turn-on sequence. For convenience of explanation, it is assumed that there are 12 transmission lines (121 ₁ to 121 ₁₂ ), and the transmission lines 121 ₁ to 121 _{12 are} sequentially arranged. It is assumed that the transmission line is divided into three groups, each group having four transmission lines arranged in order, but the present invention does not limit the number of transmission lines in the group and the group.

If the second open sequence generated by the sequence generator 127 is 1324, in this embodiment, the micro control module 126 sequentially turns on the transmission lines 121 ₁ , 121 ₃ , 121 ₂ , 121 ₄ in the group G1 , and then Then, the transmission lines 121 ₅ , 121 ₇ , 121 ₆ , and 121 ₈ in the group G2 are turned on, and finally the transmission lines 121 ₉ , 121 ₁₁ , 121 ₁₀ , and 121 ₁₂ in the group G3 are turned on.

In other embodiments, the micro control module 126 turns on the groups G1 G G3 in sequence. For example, the order in which the micro control module 126 turns on the group is G1, G3, and G2. In addition, in the above embodiment, the micro control module 126 turns on the transmission lines of the groups G1 G G3 according to the same opening sequence. However, in other embodiments, the micro control module 126 is different for different groups. The order of opening, open the transmission line within the group.

For example, the sequence generator 127 sequentially generates three sequences, which are 1324, 1423, and 2413, respectively. Therefore, the micro control module 126 first turns on the transmission lines 121 ₁ , 121 ₃ , 121 ₂ , 121 ₄ in the group G1 , and then turns on the transmission lines 121 ₅ , 121 ₈ , 121 ₆ , 121 ₇ in the group G ₂ , and finally The transmission lines 121 ₁₀ , 121 ₁₂ , 121 ₉ , 121 ₁₁ in the group G3 are turned on.

In the above embodiment, the sequence generator 127 outputs the order in which the transmission lines are turned on, but is not intended to limit the present invention. In other embodiments, the sequence generator 127 may output the order in which the groups are turned on.

Figure 5 is a schematic diagram of another possible opening sequence of the transmission line. In the present embodiment, the sequence generator 127 generates a random number opening sequence. Therefore, the micro control module 126 turns on the transmission lines 121 ₁ to 121 ₁₂ in a random number manner. In this example, the micro control module 126 does not divide the transmission lines 121 ₁ - 121 ₁₂ into a plurality of groups. However, regardless of the manner in which the micro control module 126 turns on the transmission line, in a frame of the panel 120, each transmission line is turned on and is not repeated.

When the transmission line is turned on, the read line 123 senses the level on the transmission line and generates a sensing signal S _EN1 ~S _ENn . The read control circuit 129 reads the sense signals S _EN1 ~S _ENn and provides them to the micro control module 126. The micro control module 126 stores the sensing signals S _EN1 S S _ENn in the memory space 130 according to the second turn-on sequence of turning on the transmission line 121. It is assumed that the micro control module 126 sequentially turns on the transmission lines 121 ₁ , 121 ₃ , 121 ₂ , and 121 ₄ in the group G1. Therefore, the micro control module 126 stores the first sensing signals S _EN1 ~ S _ENn in the The position corresponding to the transmission line 121 _{1 in} the memory space 130, and then storing the second sensing signals S _EN1 ~ S _ENn in the position corresponding to the transmission line 121 ₃ in the memory space 130, and then the third sensing signal S _EN1 ~ S _{The ENn is} stored in the memory space 130 at a position corresponding to the transmission line 121 ₂ , and finally the fourth sensing signals S _EN1 to S _{ENn are} stored in the memory space 130 at a position corresponding to the transmission line 121 ₄ .

When all the sensing signals S _EN1 ~ S _ENn are stored in the memory space 130, the micro control module 126 processes the data stored in the memory space 130 to generate a critical signal. In this embodiment, the micro control module 126 has a specific operation formula, and generates a corresponding critical signal according to the data stored in the memory space 130. In a possible embodiment, the critical signal is related to the average of the sensed signals stored in the memory space 130.

After the threshold signal is obtained, the micro control module 126 compares the sensing signals S _EN1 S S _ENn corresponding to each transmission line stored in the memory space 130 with the threshold signal. When one of the plurality of sensing signals S _EN1 to S _ENn is greater than the critical signal, it indicates that the corresponding transmission line is interfered. Since the degree of noise interference of the transmission line 121 is not uniform, the micro control module 126 reads the sequence generator 127 again to learn a third opening sequence, and generates a switching signal S _SW2 according to the third opening sequence.

The transmission switching circuit 128 turns on the transmission line 121 again based on the switching signal S _SW2 . The micro control module 126 updates the memory space 130 with a new sensing signal according to the third opening sequence, and generates a new critical signal, and compares the new critical signal with the sensing signal stored in the memory space 130 until the memory The sensing signals stored in the space 130 are not greater than the critical signal.

In a possible embodiment, when the sensing signals stored in the memory space 130 are not greater than the critical signal, it indicates that the degree of noise interference of the transmission line 121 has been equalized. Therefore, the micro control module 126 adjusts one according to the final critical signal. A filter coefficient of the filtering unit (not shown).

The filtering unit may be a filter for filtering noise in the sensing signals S _EN1 ~S _ENn . In a possible embodiment, when the transmission line 121 is turned on and is not disturbed by the voltage level on the turned-on scan line 111, the filtering unit does not need to filter out noise interference from the scan line 111. However, when the transmission line 121 is turned on and is interfered by the voltage level on the turned-on scan line 111, a filtering unit is required to filter out the noise on the transmission line 121. Since the degree of noise interference of each transmission line is similar, a single filtering unit can be used to filter out noise on all transmission lines 121. In a possible embodiment, the filtering unit is disposed in the micro control module 126.

Since the interference on the transmission line 121 is suppressed or homogenized, when an external force touches the panel 120, the control unit 122 can correctly determine the touched position without erroneously applying the voltage on the scanning line 111. The level of interference is considered to be a touch.

Figure 6 is a possible embodiment of a control method of the present invention. The control method of the present invention is applicable to a display device including a first panel and a second panel. The second panel overlaps the first panel. The first panel has a plurality of scan lines and the second panel has a plurality of transmission lines. The scan line and the transmission line extend in the same direction (eg, horizontal direction). In a possible embodiment, a transmission line overlaps a plurality of scan lines.

First, a memory space is planned in a memory module according to a preset resolution (step S611). In a possible embodiment, the preset resolution is related to the number and/or arrangement of the interlaced points of the transmission line and the read line of the second panel. The invention does not limit the manner in which the preset resolution is produced. In a possible embodiment, the preset resolution is preset in advance. The designer can generate a preset resolution according to the number and arrangement of the interlaced points of the transmission line and the read line of the second panel. In another embodiment, a control unit can be used to detect the number and arrangement of the interlaced points of the transmission line and the read line of the second panel to generate a predetermined resolution.

According to an opening sequence, the transmission line of the second panel is turned on (step S612). The invention does not limit how the order of opening is generated. In a possible embodiment, a random number generator can be utilized to generate an open sequence. In this embodiment, the opening order of the transmission lines of the second panel is different from the opening sequence of the scanning lines of the first panel. For example, the scan lines of the first panel are sequentially turned on, The transmission lines of the second panel are not turned on sequentially.

Next, a complex sense signal is received (step S613). In a possible embodiment, the sensing signals are stored in a previously planned memory space according to the order in which the transmission lines are turned on.

The sensing signal stored in the memory space is calculated (step S614). The invention does not limit how the sensing signal is calculated. In a possible embodiment, the average value of the sensing signals stored in the memory space is calculated, and a threshold signal is generated according to the average value.

Based on the threshold signal, it is determined whether the sensing signal stored in the memory space is uniform (step S615). In a possible embodiment, if the sensing signal stored in the memory space is greater than the threshold signal, the degree of noise interference of the sensing signal stored in the memory space is not uniform. Therefore, returning to step S612, using another opening sequence, Re-open the transmission line, and read and store the new sensing signal (step S613), calculate a new critical signal (step S614), and then determine the noise interference of the sensing signal stored in the memory space according to the new critical signal. Whether the degree is uniform (step S615).

If the sensing signal stored in the memory space is not greater than the threshold signal, the degree of noise interference of the sensing signal stored in the memory space is uniform. Therefore, a filtering parameter is set according to the threshold signal (step S616). In this embodiment, by setting the filtering parameters of a filtering unit, the filtering unit can be used to filter out noise interference on the transmission line.

After the filter parameter setting is completed, the first panel is caused to present an image (step S617). In this embodiment, when steps S611 to S616 are performed, the external force does not touch the second panel, and therefore, the degree of noise interference received by each transmission line can be known. By adjusting the order in which the transmission lines are turned on, each of them can be appropriately adjusted. The degree of interference experienced by the transmission line. After the interference level of each transmission line is similar, and then detecting whether the external force touches the display device, the misjudgment can be avoided (the interference of the scanning line is regarded as an external force touch).

In this embodiment, since the opening sequence of the transmission line of the second panel is different from the opening sequence of the scanning line of the first panel, the transmission line of the second panel is not easily interfered by the scanning line of the first panel, so it can be read. The sensed signal is homogenized (in the absence of any external force touching the second panel). Even if the transmission line is interfered by the scanning line, since the order of opening the transmission line is different from the order of opening the scanning line, the probability of each transmission line being interfered is the same, so that a uniform sensing signal can still be obtained.

Unless otherwise defined, all terms (including technical and scientific terms) are used in the ordinary meaning Moreover, unless expressly stated, the definition of a vocabulary in a general dictionary should be interpreted as consistent with the meaning of an article in its related art, and should not be interpreted as an ideal state or an overly formal voice.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧ display device

110, 120‧‧‧ panels

113, 122‧‧‧Control unit

111‧‧‧ scan line

121, 121 ₁ ~ 121 ₁₂ ‧‧‧ transmission line

112‧‧‧Information line

113‧‧‧Control unit

114‧‧‧Timing controller

115‧‧ ‧ gate driver

116‧‧‧Source Driver

122‧‧‧Control unit

123‧‧‧Reading line

124‧‧‧Memory Module

125‧‧‧Transport interface

126‧‧‧Micro Control Module

127‧‧‧Sequence Generator

128‧‧‧Transfer switching circuit

129‧‧‧Read control circuit

PIX‧‧ ‧ pixels

SA‧‧ Sensing Area

S _IM ‧‧‧External image signal

S _C1 , S _C2 ‧‧‧ control signals

S _EN1 ~S _{ENn ‧‧‧Sensor} signal

S _SW1 , S _SW2 ‧‧‧Switching signal

G1~G3‧‧‧Group

Figure 1 is a schematic diagram of one of the display devices of the present invention.

FIG. 2 is a possible internal architecture of panel 110.

Figure 3 is a schematic diagram of one of the panels 120 possible inside.

Figure 4 is a schematic diagram showing the possible opening sequence of one of the transmission lines.

Figure 5 is a schematic diagram showing the possible opening sequence of one of the transmission lines.

Figure 6 is a possible embodiment of a control method of the present invention.

G1~G3‧‧‧Group

121 ₁ ~121 ₁₂ ‧‧‧Transmission line

Claims (11)

A display device includes: a first panel having a plurality of scan lines; a first control unit that turns on the scan lines according to a first turn-on sequence; a second panel having a plurality of transmission lines; and a second control unit Turning on the transmission lines according to a second opening sequence, wherein the first opening sequence is different from the second opening sequence, the second panel further includes: a plurality of reading lines, and generating a complex sense according to the opening state of the transmission lines The signal is measured, wherein the second control unit receives and according to the sensing signals, switches to the third open sequence to turn on the transmission lines again. The display device of claim 1, wherein the first panel is a liquid crystal panel, and the second panel is a touch panel. The display device of claim 1, wherein the first control unit sequentially turns on the scan lines according to the first turn-on sequence; and the second control unit turns on in a non-sequential manner according to the second turn-on sequence. These transmission lines. The display device of claim 1, wherein the third opening sequence is different from the second opening sequence. The display device of claim 1, wherein the second control unit comprises: a memory module for storing the sensing signals; and a sequence generator for generating the second opening sequence; a micro control module divides a memory space from the memory module according to a preset resolution, and reads the sequence generator to learn the second opening sequence, and according to the second opening sequence Generating a first switching signal; a transmission switching circuit that turns on the transmission lines according to the first switching signal; and a read control circuit that reads the sensing signals through the read lines and provides the same The micro control module, wherein the micro control module stores the sensing signals in the memory space according to the second opening sequence, and processes the data stored in the memory space to generate a critical signal, the micro The control module compares the sensing signals with the threshold signal. When one of the sensing signals is greater than the threshold signal, the micro control module reads the sequence generator to learn a third opening sequence. And generating a second switching signal according to the third opening sequence; wherein the transmission switching circuit turns on the transmission lines again according to the second switching signal. The display device of claim 5, wherein when the sensing signals are not greater than the threshold signal, the micro control module adjusts a filter coefficient of a filtering unit according to the threshold signal. The display device of claim 6, wherein the filtering unit is disposed in the micro control module. The display device of claim 5, wherein the threshold signal is related to an average of the sensing signals. The display device of claim 5, wherein the sequence generator is a random number generator. A control method suitable for a display device, the display device package a first panel and a second panel, the first panel having a plurality of scan lines, the scan lines being turned on according to a first opening sequence, the second panel having a plurality of transmission lines, the control method comprising: according to a pre- Setting a memory space; using a second opening sequence to enable the transmission lines, wherein the second opening sequence is different from the first opening sequence; generating a complex sensing signal according to the on state of the transmission lines; In the second opening sequence, the sensing signals are stored in the memory space; and according to the sensing signals, the transmission lines are turned on again in a third opening sequence. The control method of claim 10, further comprising: calculating the sensing signals stored in the memory space to generate a threshold signal; and comparing the sensing signals stored in the memory space with The threshold signal, when one of the sensing signals is greater than the threshold signal, controls the transmission lines by using the third opening sequence, wherein the third opening sequence is different from the second opening sequence, when the sensing When the signal is not greater than the critical signal, a filter coefficient of one of the filtering units is set according to the critical signal.