TWI514230B - Method of operating a capacitive touch panel and capacitive touch sensor - Google Patents

Description

Capacitive touch panel operation method and capacitive touch sensor

The present invention relates to a method for operating a capacitive touch panel, and more particularly to a method for operating a capacitive touch panel that can be simultaneously applied to finger detection and stylus detection.

The input device is an important device for human-computer interaction. In the past, a mouse or a keyboard is often used to input commands to an electronic device. However, as the user's portability and intuitive input interface for electronic devices become higher and higher, the touch sense is increased. As an input device, the detector not only reduces the space requirement, but also can be connected with the visual picture, so it can be used as a popular method to meet the needs of both the portability and the intuitive input interface.

Common touch sensing methods for electronic devices include finger touch directly through the human body and touch with a special function such as a stylus. In the past, the stylus used the technology of electromagnetic induction to indicate the position of the stylus on the touch panel. Therefore, the touch panel must also be equipped with components with electromagnetic sensing function to resolve the contact position of the stylus. . Finger touches often use a finger to touch the touch panel to cause a change in capacitance or resistance to sense the pointing position of the finger on the touch panel. Since the principles of the two are not the same, the position of the stylus cannot be normally sensed on the capacitive (or resistive) touch panel designed by finger touch; similarly, only the touch with electromagnetic induction function The panel also cannot sense the position of the finger. If the touch panel can simultaneously support the above-mentioned finger touch and stylus touch function, the touch panel must have both an electromagnetic induction component and a capacitor (or resistance) sensing component. However, this method will result in The thickness of the panel is increased, which is contrary to the user's demand for portability, and may also reduce the yield and increase the production cost.

One embodiment of the present invention provides a capacitive touch sensor including a stylus and a touch panel. The stylus is configured to emit a second RF signal, and the touch panel includes a plurality of first sensing lines, a transmitter, a plurality of switches, a plurality of second sensing lines, a touch receiver, and a transceiver mode controller. The transmitter is coupled to the first sensing lines for transmitting a first RF signal via the first sensing lines, and the first RF signal sent by the transmitter is orthogonal to the second RF signal. The plurality of open relationships are coupled to the plurality of first sensing lines and the transmitter for controlling the electrical connection between the first sensing line and the transmitter. The plurality of second sensing lines are interlaced with the plurality of first sensing lines for receiving the second RF signal and the first RF signals sent by the plurality of first sensing lines. The touch receiver is coupled to the plurality of first sensing lines and the plurality of second sensing lines for generating a position where the touch panel is touched. The transceiver mode controller is coupled to the transmitter, the plurality of switches, and the touch receiver, and is configured to control the transmitter to sequentially send the first RF signal through the first sensing lines, to turn off or turn on the switch, and The control receiver detects and analyzes signals received by the plurality of first sensing lines and the plurality of second sensing lines. When the touch receiver detects the second RF signal, the transceiver mode controller turns off the switch to stop the transmitter from transmitting the first RF signal through the plurality of first sensing lines, and the transceiver mode controller also controls the touch receiving. The device generates a position where the touch panel is touched according to the first sensing line that receives the second RF signal and the second sensing line that receives the second RF signal from the plurality of first sensing lines.

One embodiment of the present invention provides a method of operating a capacitive touch panel. The capacitive touch panel includes a plurality of first sensing lines and a plurality of second sensing lines, and the plurality of first sensing lines are interlaced with the plurality of second sensing lines. The operation method includes controlling a plurality of first sensing lines to send a first RF signal to a plurality of second sensing lines; and when the plurality of second sensing lines detect a first orthogonal to the first RF signals sent by the plurality of first sensing lines When the two RF signals are received, the plurality of first sensing lines stop sending the first RF signal to the plurality of second sensing lines, and control the plurality of first sensing lines to receive the second RF signal; and receiving the first sensing line according to the plurality of first sensing lines First sensing line and plural of the second RF signal The second sensing line of the second sensing line receives the second sensing line of the second RF signal, and generates a position where the touch panel is touched.

10‧‧‧Touch sensor

100,200‧‧‧ touch panel

102, 202‧‧‧ first sensing line

104‧‧‧Second sensing line

106‧‧‧Switch

108‧‧‧transmitter

110‧‧‧Touch Receiver

112‧‧‧Transceiver mode controller

131‧‧‧Multiplexer

132‧‧‧Analysis unit

133‧‧‧Touch position calculation unit

SIG ₁ ‧‧‧first sensing signal

SIG ₂ ‧‧‧Second Sensing Signal

SIG ₃ ‧ ‧ third sensing signal

202A‧‧‧A set of first sensing lines

S310 to S360, S510 to S560‧‧‧ process steps

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

FIG. 2 is a schematic diagram of a touch sensor according to another embodiment of the present invention.

FIG. 3 is a flow chart of the operation method of the capacitive touch panel of FIG. 1.

Fig. 4 is a flow chart showing another operation method of the capacitive touch panel of Fig. 1.

Fig. 5 is a flow chart showing the operation method of the capacitive touch panel of Fig. 2.

Fig. 6 is a flow chart showing another operation method of the capacitive touch panel of Fig. 2.

Please refer to FIG. 1 , which is a schematic diagram of a touch sensor 10 according to an embodiment of the invention. The touch sensor 10 includes a touch panel 100 and a stylus 120. The touch panel 100 includes a plurality of first sensing lines 102, a plurality of second sensing lines 104, a plurality of switches 106, a transmitter 108, a touch receiver 110, and a transceiver mode controller 112.

The stylus 120 is configured to transmit a second RF signal SIG ₂ . The plurality of switches 106 are coupled to the plurality of first sensing lines 102 and the transmitters 108. Each of the switches 106 can be used to control an electrical connection between the transmitters 108 and the corresponding first sensing lines 102. When the transmitter 108 is coupled to the plurality of first sensing lines 102 via the plurality of switches 106, the transmitter may send the first RF signal SIG ₁ via the plurality of first sensing lines 102, wherein the first RF signal sent by the transmitter 108 The SIG ₁ is orthogonal to the second RF signal SIG ₂ . The plurality of second sensing lines 104 are interleaved with the plurality of first sensing lines 102 for receiving the second RF signal SIG ₂ and the first RF signal SIG ₁ emitted from the plurality of first sensing lines 102. The touch receiver 110 is coupled to the plurality of first sensing lines 102 and the plurality of second sensing lines 104 for generating a position where the touch panel 100 is touched. The transceiver mode controller 112 is coupled to the transmitter 108, the plurality of switches 106, and the touch receiver 110 for controlling the transmitter 108 to sequentially send the first RF signal SIG ₁ via the first sensing line 102 for cutting off or The plurality of switches 106 are turned on, and the touch receiver 110 is controlled to detect and analyze signals received by the plurality of first sensing lines 102 and the plurality of second sensing lines 104.

The transceiver mode controller 112 turns on the plurality of switches 106 first, and controls the transmitter 108 to sequentially send the first RF signal SIG through the first sensing line 102, in the case where the user touches the stylus or touches the stylus. _1. At this time, the plurality of second sensing lines 104 receive the first RF signal SIG ₁ sent from the plurality of first sensing lines. At this time, if the user touches the touch panel 100 with a finger, the size of the capacitor near the position A touched by the finger of the touch panel 100 is changed, so that the second sensing line 104 near the point A receives an amplitude smaller than the first. a radio frequency signal _{SIG. 1} but with the first radio frequency signal SIG same third RF signal ₁ SIG _3, when the touch receiver 110 detects this third RF signal _{SIG. 3,} the transceiver mode, the controller 112 controls the touch the receiver 110 then emits a first radio frequency signal SIG ₁ of a first sensing line 102 and a plurality of second sensing line 104 receives the third RF signals _{SIG. 3} of the second sensing line 104 a plurality of first sense lines 102 according to the A position at which the touch panel 100 is touched is generated. In one embodiment of the present invention, the touch receiver 110 includes a multiplexer 131, an analysis unit 132, and a touch position calculation unit 133. The multiplexer 131 is coupled to the plurality of first sensing lines 102 and the plurality of second sensing lines 104. By controlling the multiplexer 131, the transceiver mode controller 112 can control the touch receiver 110 to sequentially receive each of the strips. The second sensing line 104 receives the signal, and then analyzes the frequency and amplitude of the received signal via the analyzing unit 132, and the touch position calculating unit 133 is based on the analysis result of the analyzing unit 132 and according to the plurality of times when the touch occurs. The first sensing line 102 that emits the first RF signal SIG ₁ in the sensing line 102 and the second sensing line 104 that receives the third RF signal SIG _{3 in} the plurality of second sensing lines 104 generate the touch panel 100 that is touched. position.

In addition, in the above process, if the touch receiver 110 detects the second RF signal SIG ₂ sent by the stylus 120, it indicates that the user wants to use the stylus 120 to indicate the touch position of the touch panel 100. At this time, the transceiver mode controller 112 turns off the plurality of switches 106 to stop the transmitter 108 from transmitting the first RF signal SIG ₁ through the plurality of first sensing lines 102, and the transceiver mode controller 112 controls the touch receiver 110 to receive. The signal received from the plurality of first sensing lines 102 and the plurality of second sensing lines 104 is analyzed, and the touch receiver 110 receives the second RF signal SIG ₂ according to the plurality of first sensing lines 102. The second sensing line 104 of the second RF signal SIG ₂ is received by the first sensing line 102 and the plurality of second sensing lines 104 to generate a position where the touch panel 100 is touched. In an embodiment of the present invention, the transceiver mode controller 112 can control the touch receiver 110 to sequentially receive each of the first sensing lines 102 and each of the second sensing lines 104 by controlling the multiplexer 131. After receiving the signal, the frequency and amplitude of the received signal are analyzed by the analyzing unit 132, and the touch position calculating unit 133 receives the second according to the analysis result of the analyzing unit 132 and according to the plurality of first sensing lines 102. The first sensing line 102 of the RF signal SIG ₂ and the second sensing line 104 of the second sensing line 104 receive the second sensing line 104 of the second RF signal SIG _{2 to} generate a position where the touch panel 100 is touched.

Since the first RF signal _{SIG. 1} and the second frequency RF signal SIG ₂ are orthogonal to each other, so the analysis unit 132 may utilize fast Fourier parsing (fast Fourier transform) to analyze each of the first sensing line 102 and the second sensing each of The frequency at which the line 104 receives the signal is not affected by the noise and causes a false positive. In other embodiments, the analyzing unit 132 may also analyze the frequency of the received signal according to a band pass filter or an in-phase/quadrature demodulator (I/Q demodulator).

In addition, since the plurality of first sensing lines 102 and the plurality of second sensing lines 104 receive the second RF signal SIG ₂ from the stylus 120 from the outside of the touch panel, noise interference is more likely to occur, in order to avoid In this embodiment, the frequency of the second RF signal SIG ₂ can be higher than the frequency of the first RF signal SIG ₁ to reduce the influence of the noise on the second RF signal SIG ₂ .

If the touch of the finger and the stylus is detected at the same time, after the touch receiver 110 detects the second RF signal SIG ₂ sent by the stylus 120, the transceiver mode controller 112 may first cut off the plurality of switches 106. In order to stop the transmitter 108 from transmitting the first RF signal SIG ₁ through the plurality of first sensing lines 102, the touch receiver 110 can receive the second RF signal SIG ₂ according to the plurality of first sensing lines 102. The second sensing line 104 of the second RF signal SIG ₂ is received by the first sensing line 102 and the plurality of second sensing lines 104 to generate a position where the touch panel 100 is touched by the stylus 120; After the position touched by the stylus is 100, the transceiver mode controller 112 turns on the plurality of switches 106 again, and controls the transmitter 108 to sequentially send the first RF signal SIG ₁ via the first sensing line 102 to enable the touch receiver 110. The position where the touch panel 100 is touched by the finger is detected. Through the control of the transmitter 108, the plurality of switches 106 and the touch receiver 110 by the transceiver mode controller 112, the position of the touch panel 100 touched by the finger or the stylus 120 can be detected in turn.

In addition, in the above embodiment, the analysis unit 132 and the touch position calculation unit 133 are disposed in the touch receiver 110. However, the present invention is not limited thereto; that is, in other embodiments, the analysis unit The touch position calculation unit 133 can be a separate module instead of being disposed inside the touch receiver 110.

Please refer to FIG. 2 , which is a schematic diagram of a touch sensor 20 according to another embodiment of the present invention. The touch sensor 20 has the same operation principle as the touch sensor 10, and the difference is that the touch panel 200 of the touch sensor 20 includes a plurality of first sensing lines 202A, and each group has a first sense. Line 202A includes a plurality of first sense lines 202.

In the case where the user does not know that the user touches with the finger or the stylus 120, the transceiver mode controller 112 turns on the plurality of switches 106 first, and controls the transmitter 108 to sequentially send the first sensing line 202A via the complex array. an RF signal SIG _1, i.e. while the first RF signals SIG ₁ emits a first set of a first through a first sensing line 202A of the first plurality of strips sensing line 202, and then through the second set while the first sensing line 202A to the first plurality of strips The sensing line 202 sends the first RF signal SIG ₁ , and so on, and the first RF signals SIG ₁ sent by the plurality of first sensing lines 202 in any one of the first sensing lines 202A are orthogonal to each other, and the different groups The first RF signal SIG ₁ sent by the first sensing line 202 of the same order may be the same frequency signal, such as the kth first sensing line 202 and the nth first sensing line of the mth first sensing line 202A. The first RF signal SIG ₁ from the kth first sensing line 202 of 202A may have the same frequency, where m ≠ n and m, n and k are all positive integers. When the control transmitter 108 sequentially sends the first RF signal SIG ₁ via the complex array first sensing line 202A, the plurality of second sensing lines 104 receive the first RF signal SIG ₁ emitted from the complex array first sensing line 202A. At this time, if the user touches the touch panel 200 with a finger, the size of the capacitor near the position A touched by the finger of the touch panel 200 is changed, so that the second sensing line 104 near the point A receives an amplitude smaller than the first. a radio frequency signal _{SIG. 1} but with the first radio frequency signal SIG same third RF signal ₁ SIG _3, when the touch receiver 110 detects this third RF signal _{SIG. 3,} the transceiver mode, the controller 112 controls the touch The receiver 110 receives the second sensing line 104 of the third RF signal SIG ₃ according to the first sensing line 202 of the first RF line SIG ₁ and the second sensing line 104 of the first sensing line 202A. A position at which the touch panel 100 is touched is generated. Since the first radio frequency signals SIG ₁ transmitted by the plurality of first sensing lines 202 in any one of the first sensing lines 202A are orthogonal to each other, the analyzing unit 132 can simultaneously analyze the plurality of bars by using fast Fourier transform. The second sensing line 104 receives the frequency and amplitude of the first RF signal SIG _{1 from} the plurality of first sensing lines 202 in the same set of first sensing lines 202A, without being affected by noise and causing false positives. In other embodiments, the analysis unit 132 can also analyze according to a band pass filter, or an in-phase/quadrature demodulator. Therefore, in FIG. 1 , the time when the transmitter 108 of the touch sensor 10 sends the first RF signal SIG ₁ one by one on the plurality of first sensing lines 102 can be saved.

In the above process, if the touch receiver 110 detects the second RF signal SIG ₂ sent by the stylus 120, the user wants to use the stylus 120 to indicate the touch position of the touch panel 100. The transceiver mode controller 112 turns off the plurality of switches 106 to stop the transmitter 108 from transmitting the first RF signal SIG ₁ via the complex array first sensing line 202A, and the transceiver mode controller 112 controls the touch receiver 110 to receive and analyze. The signal received from the complex array first sensing line 202A and the plurality of second sensing lines 104, and the touch receiver 110 can receive the first of the second RF signals SIG ₂ according to the complex array first sensing line 202A. The second sensing line 104 of the second RF signal SIG ₂ is received in the sensing line 202 and the plurality of second sensing lines 104 to generate a position where the touch panel 200 is touched. Since the frequencies of the first RF signal SIG ₁ and the second RF signal SIG ₂ are orthogonal to each other, the analyzing unit 132 can respectively output the frequency and amplitude of the first RF signal SIG ₁ and the second RF signal SIG ₂ , and generate correct touches. Control position.

Please refer to FIG. 3 , which is a flowchart of a method 300 for operating the capacitive touch panel 100 according to an embodiment of the invention. The operation method 300 of the capacitive touch panel includes the following steps: S310: controlling the plurality of first sensing lines 102 to send the first RF signal SIG ₁ to the plurality of second sensing lines 104; S320: when the plurality of second sensing lines 104 detect SIG _2, a plurality of first sensing line 102 stops emitting a first RF signal SIG ₁ to a plurality of second RF signals measured at a second radio frequency signal with the first orthogonal issued SIG ₁ and a plurality of first sensing line 102 Sensing line 104, and controlling a plurality of first sensing lines 102 to receive the second RF signal SIG ₂ ; S330: receiving the first sensing line 102 and the plurality of lines of the second RF signal SIG ₂ according to the plurality of first sensing lines 102 The second sensing line 104 of the second RF signal SIG ₂ receives the position where the touch panel 100 is touched; S340: When the plurality of first sensing lines 102 and the plurality of second sensing lines 104 are received When a plurality of first sensing lines 102 and a plurality of second sensing lines 104 fail to receive the second RF signal SIG ₂ within a predetermined period of time after the second RF signal SIG ₂ , the plurality of first sensing lines 102 are controlled to issue the first to a plurality of RF signals SIG ₁ The second sensing line 104; S350: when a plurality of second sensing line 104 receives a first RF signal SIG ₁ of a third RF signal _{SIG. 3,} the issue of the first RF signal according to the plurality of first sensing line 102 is less than the amplitude of SIG the first sensing line ₁₁₀₂ and a plurality of second sensing line 104 receives the third RF signals SIG ₃ of the second sensing line 104, generates touch position of the touch panel 100.

Please refer to FIG. 4 . FIG. 4 is a flowchart of a method 400 for operating the capacitive touch panel 100 according to another embodiment of the present invention, which can detect the touch positions of the finger and the stylus in turn.

S310: controlling the plurality of first sensing lines 102 to send the first RF signal SIG ₁ to the plurality of second sensing lines 104; S320: when the plurality of second sensing lines 104 detect the first sensing line 102 and the plurality of first sensing lines 102 When the RF signal SIG _{1 is} orthogonal to the second RF signal SIG ₂ , the plurality of first sensing lines 102 stop sending the first RF signal SIG ₁ to the plurality of second sensing lines 104, and control the plurality of first sensing lines 102 to receive The second RF signal SIG ₂ ; S330: receiving the second RF signal SIG _{2 according to} the first sensing line 102 and the plurality of second sensing lines 104 of the first sensing line 102 receiving the second RF signal SIG ₂ The second sensing line 104 generates a position where the touch panel 100 is touched. S360: After controlling the plurality of first sensing lines 102 to receive the second RF signal SIG ₂ , controlling the plurality of first sensing lines 102 to send the first RF signal. SIG ₁ to a plurality of second sensing lines 104.

Please refer to FIG. 5 , which is a flowchart of a method 500 for operating the capacitive touch panel 200 according to an embodiment of the invention. The operation method 500 of the capacitive touch panel includes the following steps: S510: sequentially controlling the complex array first sensing line 202A to issue the first RF signal SIG ₁ to the plurality of second sensing lines 104, wherein each group of the first sensing lines 202A The first RF signals SIG ₁ sent by the plurality of first sensing lines 202 are orthogonal to each other; S520: When the plurality of second sensing lines 104 detect the first RF signal SIG ₁ sent by the first sensing line 202A of the complex array When the second RF signal SIG ₂ is orthogonal, the complex array first sensing line 202A stops emitting the first RF signal SIG ₁ to the plurality of second sensing lines 104, and the control complex array first sensing line 202A receives the second RF signal SIG ₂ : S530: The first sensing line 202 receiving the second RF signal SIG ₂ and the second sensing line 104 receiving the second RF signal SIG _{2 in} the plurality of second sensing lines 104 in the first sensing line 202A of the complex array a position where the touch panel 100 is touched is generated; S540: the complex array first sensing line 202A is performed after the plurality of first sensing lines 202A and the plurality of second sensing lines 104 receive the second RF signal SIG _{2 for} a predetermined period of time And a plurality of second sensing When the second RF signal SIG ₂ is not received by the line 104, the first array of sensing lines 202A is sequentially controlled to issue the first RF signal SIG ₁ to the plurality of second sensing lines 104; S550: when the plurality of second sensing lines 104 Receiving the third RF signal SIG ₃ having a smaller amplitude than the first RF signal SIG ₁ , according to the first sensing line 202 and the plurality of second sensing lines 104 of the first sensing line 202A that emit the first RF signal SIG ₁ The second sensing line 104 of the third RF signal SIG ₃ is received, and the position where the touch panel 100 is touched is generated.

Please refer to FIG. 6 . FIG. 6 is a flowchart of a method 600 for operating the capacitive touch panel 200 according to an embodiment of the present invention. The touch position of the finger and the stylus can be detected in turn.

S510: sequentially controlling the complex array first sensing line 202A to issue the first RF signal SIG ₁ to the plurality of second sensing lines 104, wherein the first plurality of sensing lines 202 in each of the first sensing lines 202A are first issued The RF signals SIG ₁ are orthogonal to each other; S520: when the plurality of second sensing lines 104 detect the second RF signal SIG ₂ orthogonal to the first RF signal SIG ₁ sent by the complex array first sensing line 202A, the complex array The first sensing line 202A stops sending the first RF signal SIG ₁ to the plurality of second sensing lines 104, and controls the complex array first sensing line 202A to receive the second RF signal SIG ₂ ; S530: According to the complex array, the first sensing line 202A Receiving the second sensing line 104 of the second RF signal SIG _{2 in} the first sensing line 202 and the plurality of second sensing lines 104 of the second RF signal SIG ₂ , the position where the touch panel 100 is touched is generated; S560 After the control of the complex array first sensing line 202A receives the second RF signal SIG ₂ , the first array of sensing lines 202A is sequentially controlled to issue the first RF signal SIG ₁ to the plurality of second sensing lines 104.

According to the embodiment of the present invention, the touch sensor and the method of the present invention utilize the principle that the first RF signal and the second RF signal are orthogonal to each other, so that the user can utilize the capacitive type. The touch panel detects a stylus or a finger to indicate where the touch panel is touched without adding another sensing line. In addition, according to the embodiment of the present invention, the touch sensor and the method of the present invention can detect the first RF signal and the second RF signal orthogonal to each other in turn, so that the user can simultaneously use the stylus and A finger indicates the position at which the touch panel is touched.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

S310 to S350‧‧‧ process steps

Claims (14)

A capacitive touch sensor includes: a stylus for transmitting a second RF signal; a touch panel comprising: a plurality of first sensing lines; and a transmitter coupled to the first senses a first radio frequency signal sent by the first sensing line, wherein the first radio frequency signal sent by the transmitter is orthogonal to the second radio frequency signal; and the plurality of switches are coupled to the first sensing lines and The transmitter is configured to control the electrical connection between the first sensing lines and the transmitter; the plurality of second sensing lines are interlaced with the first sensing lines for receiving the second RF signal and the a first RF signal sent from the first sensing line; a touch receiver coupled to the first sensing line and the second sensing lines for generating a touched position of the touch panel; a transceiver mode controller, coupled to the transmitter, the switch, and the touch receiver, configured to control the transmitter to sequentially send a first RF signal through the first sensing lines to turn off or turn on the Some switches and for controlling the touch receiver to make the touch The receiver detects and analyzes the signals received by the first sensing lines and the second sensing lines; wherein when the touch receiver detects the second RF signal, the transceiver mode controller turns off the switches So that the transmitter stops sending the first RF signal through the first sensing lines, and the transceiver mode controller controls the touch receiver, so that the touch receiver receives the first one according to the first sensing lines. A first sensing line of the second RF signal and a second sensing line of the second RF signal received by the second sensing line generate a position where the touch panel is touched. The capacitive touch sensor of claim 1, wherein the touch receiver detects the first sensing lines and the second sensing lines receive the second RF signal for a predetermined period of time, When the first sensing line and the second sensing lines do not receive the second RF signal, the touch receiver turns on the switch control and controls the transmitter to sequentially send the first through the first sensing lines. RF signal. The capacitive touch sensor of claim 2, wherein when the touch receiver detects that the second sensing lines receive a third RF signal whose amplitude is less than a first RF signal, the transceiver mode The controller controls the touch receiver to enable the touch receiver to receive the third RF signal according to the first sensing line that sends the first RF signal and the second sensing lines in the first sensing lines. The second sensing line generates a position at which the touch panel is touched. The capacitive touch sensor of claim 1, wherein after the touch receiver controls the first sensing lines to receive the second RF signal, the touch receiver turns on the switch controls and controls the The transmitter sequentially sends the first RF signal via the first sensing lines. A capacitive touch sensor includes: a stylus for transmitting a second RF signal; a touch panel comprising: a complex array of first sensing lines; and a transmitter coupled to the complex array first a sensing line for transmitting a first RF signal through the first array of the first sensing line, wherein the first RF signal sent by the first sensing line of the complex array is orthogonal to the second RF signal, and each of the first sensing lines The first RF signals sent by the plurality of first sensing lines are orthogonal to each other; a plurality of switches are coupled to the first sensing line of the complex array and the transmitter for controlling the complex An electrical connection between the first sensing line and the emitter of the array; a plurality of second sensing lines interleaved with the first sensing line of the complex array for receiving the first RF signal from the first sensing line of the complex array and The second RF signal; a touch receiver coupled to the first array of sensing lines and the second sensing lines for generating a touched position of the touch panel; and a transceiver mode controller, The transmitter, the switch, and the touch receiver are configured to control the transmitter to sequentially send a first RF signal through the first array of sensing lines, to turn off or turn on the switches, and to Controlling the touch receiver, the touch receiver detects and analyzes the signals received by the first sensing lines and the second sensing lines; wherein the touch receiver detects the second senses When the test line receives the second RF signal, the transceiver mode controller turns off the switches to stop the transmitter from stopping to send the first RF signal via the first sensing lines, and the transceiver mode controller controls the touch receiving To make the touch receiver root The first sensing line of the second sensing line and the second sensing line of the second RF signal are received by the second sensing line, and the touch panel is touched. position. The capacitive touch sensor of claim 5, further comprising: when the touch receiver detects the complex array first sensing line and the second sensing lines receive the second RF signal During the time period, when the first sensing line and the second sensing lines of the complex array do not receive the second RF signal, the touch receiver turns on the switches and controls the transmitter to sequentially pass the first array through the complex array. The line sends the first RF signal in sequence. The capacitive touch sensor of claim 6, further comprising: when the touch receiver detects that the second sensing lines receive a third RF signal whose amplitude is less than a first RF signal, The transceiver mode controller controls the touch receiver to enable the touch receiving The touch panel is touched according to the first sensing line that sends the first RF signal in the first sensing line of the complex array and the second sensing line that receives the third RF signal in the second sensing lines. s position. The capacitive touch sensor of claim 5, further comprising: after the touch receiver controls the plurality of first sensing lines to receive the second RF signal, the touch receiver turns on the switches The transmitter is controlled to sequentially send the first RF signal through the first array of sensing lines. A method of operating a capacitive touch panel, the capacitive touch panel includes a plurality of first sensing lines and a plurality of second sensing lines, the first sensing lines being interlaced with the second sensing lines, the method comprising Controlling the first sensing lines to send the first RF signals to the second sensing lines; and when the second sensing lines detect the second RFs orthogonal to the first RF signals sent by the first sensing lines When the signal is received, the first sensing lines stop transmitting the first RF signal to the second sensing lines, and control the first sensing lines to receive the second RF signal; and receiving the first sensing line according to the first sensing line The first sensing line of the second RF signal and the second sensing line of the second sensing line are received by the second sensing line to generate a position where the touch panel is touched; and when the first sensing line and the first sensing line Controlling the first sensing lines to emit the first when the second sensing lines and the second sensing lines do not receive the second RF signal within a predetermined period of time after the second sensing line receives the second RF signal RF signal to the second sensing lines The method of claim 9, further comprising: when the second sensing lines receive the third RF signal having an amplitude smaller than a first RF signal, sending the first RF signal according to the first sensing lines First sensing line and the first A second sensing line of the third RF signal is received in the second sensing line to generate a position where the touch panel is touched. A capacitive touch panel includes a plurality of first sensing lines and a plurality of second sensing lines, the first sensing lines being interlaced with the second sensing lines, the method comprising: Controlling the first sensing lines to send the first RF signals to the second sensing lines; and when the second sensing lines detect the second RF signals orthogonal to the first RF signals sent by the first sensing lines The first sensing lines stop sending the first RF signal to the second sensing lines, and control the first sensing lines to receive the second RF signal; and receive the second according to the first sensing lines. The first sensing line of the RF signal and the second sensing line of the second sensing line receiving the second RF signal, the position where the touch panel is touched is generated; and when the first sensing lines are controlled to receive the After the second RF signal, the first sensing lines are controlled to send the first RF signal to the second sensing lines. A method of operating a capacitive touch panel, the capacitive touch panel comprising a plurality of first sensing lines and a plurality of second sensing lines, wherein the first array of sensing lines is interlaced with the second sensing lines, the method The method includes: sequentially controlling the first sensing line of the complex array to send a first RF signal to the second sensing lines, wherein the first RF signals sent by the plurality of first sensing lines in each of the first sensing lines are orthogonal to each other When the second sensing lines detect the second RF signal orthogonal to the first RF signal sent by the first sensing line of the complex array, the first sensing line of the complex array stops sending the first RF signal to the second RF signals. a second sensing line, and controlling the complex array first sensing line to receive the second RF signal; The touch panel is touched according to the first sensing line of the second sensing signal and the second sensing line of the second RF signal received by the second sensing line. And the first sensing line and the second sensing lines are not received in the predetermined time period after the first sensing line of the complex array and the second sensing line receive the second RF signal In the case of the two RF signals, the first sensing line of the complex array is sequentially controlled to send the first RF signal to the second sensing lines. The method of claim 12, further comprising: when the second sensing lines receive the third RF signal whose amplitude is less than a first RF signal, sending the first RF signal according to the first sensing line of the complex array The first sensing line and the second sensing line of the second sensing line receive the second sensing line of the third RF signal, and the position where the touch panel is touched is generated. A method of operating a capacitive touch panel, the capacitive touch panel comprising a plurality of first sensing lines and a plurality of second sensing lines, wherein the first array of sensing lines is interlaced with the second sensing lines, the method The method includes: sequentially controlling the first sensing line of the complex array to send a first RF signal to the second sensing lines, wherein the first RF signals sent by the plurality of first sensing lines in each of the first sensing lines are orthogonal to each other When the second sensing lines detect the second RF signal orthogonal to the first RF signal sent by the first sensing line of the complex array, the first sensing line of the complex array stops sending the first RF signal to the second RF signals. a second sensing line, and controlling the first array of sensing lines to receive the second RF signal; according to the first sensing line of the complex sensing line, the first sensing line and the second sensing lines of the second RF signal are received Receiving the second sensing line of the second RF signal to generate the touch surface After the first sensing line of the complex array receives the second RF signal, the first sensing line of the complex array is sequentially controlled to send the first RF signal to the second sensing lines.