TW201935197A - Processing method for touch control signal and stylus - Google Patents

Abstract

A processing method for touch control signal and stylus is adapted for interacting with a stylus being used with a touch panel. The method comprises receiving a transmitting signal from the touch panel and then generating a first receiving signal by a fist signal receiving component; receiving the transmitting signal and then generating a second receiving signal by a second signal receiving component; producing a result value by calculating the first receiving signal and the second receiving signal; and transmitting a driving signal corresponding to the result value to the touch panel for performing touch actions.

Description

Touch signal processing method and stylus

This creation relates to a signal processing method and a stylus, and more particularly to a touch signal processing method and a stylus using the foregoing method.

The touch screen allows users to perform various functions by touching the touch-sensitive panel with a finger, stylus, or other objects. Therefore, many electronic devices, such as smartphones or tablets, use touch The panel is used as an operation interface for the user to operate with touch, thereby improving convenience. However, in order to make the process of operating the touch panel faster and provide details such as the thickness of the drawn lines and the brush, most users will choose a touch pen for touch writing or drawing.

In order to change the thickness of the stylus when using the stylus, a pressure sensor is usually used in the pen case to determine the thickness of the stroke by sensing the pressure value of the pen core against the pressure sensor. However, its effect is not Not as expected.

According to the present invention, a touch signal processing method is provided, which is applicable to a stylus pen used with a touch panel. The method includes: using a first signal receiving part to receive at least one signal of the same frequency generated by the touch panel and Generating a first received signal; using a second signal receiving element to receive the signal and generating a second received signal; performing an operation on the first received signal and the second received signal to generate a result value; and according to the result value Send a driving signal to the touch panel for touch operation.

This creation also provides a stylus pen, which includes a signal processor, a signal transmitting member, a first signal receiving member, a second signal receiving member, a differential processor, and a control module; the signal transmitting member is electrically connected to A signal processor, the first signal receiving member is electrically connected to the signal processor and receives at least one signal generated by the touch panel and generates at least one first receiving signal; the second signal receiving member receives at least one signal and generates at least one second receiving Signal; the differential processor is electrically connected to the first signal receiving part and the second signal receiving part, and calculates the first received signal and the second received signal to generate a result value; the control module is electrically connected to the signal processor, the differential processor, and For a pressure sensor, the control module generates a driving signal to the touch panel to perform a touch operation according to a comparison between a reference voltage and a result value.

FIG. 1 is a schematic diagram of a stylus of the present invention for use with a touch panel. The stylus 1 of this creation is applied to a capacitive touch panel (hereinafter referred to as a "touch panel") 3. When the stylus 1 touches the surface of the touch panel 3, the touch panel 3 may be pressed. Get input information about stylus 1.

In FIG. 1, the stylus pen 1 is located on the touch surface 30 of the touch panel 3. The sensing point formed by the pen tip 12 and one of the scanning electrodes Tx and one of the receiving electrodes Rx in the touch panel 3 is sensed. A coupling capacitor is formed between the units S. It should be particularly noted here that the touch panel 3 may include a plurality of scanning electrodes Tx arranged parallel to the X axis, and a plurality of receiving electrodes Rx, scanning electrodes Tx, and receiving electrodes Rx arranged parallel to the Y axis. The intersection point defines a sensing unit S; for the sake of simplicity, only a scanning electrode Tx, a receiving electrode Rx corresponding to the touch point of the stylus pen 3 and a scanning electrode located in the foregoing are shown in FIG. 1. A sensing unit S at the intersection of Tx and the receiving electrode Rx.

The stylus pen 1 includes a pen 10 and a pen 12; the pen 10 is used for holding by a user; a cavity 102 may be provided in the pen 10 for receiving a circuit board 14; After the signals from the touch panel 3 are processed, a driving signal S _TX (as shown in FIG. 3) is sent to the electronic circuit of the touch panel 3 for touch operations (see details below). The pen tip 12 is located at one end of the pen tip 10 for contacting the touch surface 30 of the touch panel 3. The pen tip 12 is provided with a signal transmitting member 122, a first signal receiving member 124, a second signal receiving member 126, and a plurality of insulations. 128; the first signal receiving member 124 is disposed farthest from the pen holder 10 and used to contact the touch panel 3, and the insulating members 128 are respectively disposed at adjacent signal transmitting members 122, the first signal receiving member 124, and the first Between the two signal receiving members 126, it is avoided that the signal transmitting member 122, the first signal receiving member 124, and the second signal receiving member 126 made of a conductor such as metal or conductive plastic are in contact with each other and short-circuited.

For example, in FIG. 1, the signal transmitting element 122 is disposed between the first signal receiving element 124 and the second signal receiving element 126, and an insulating element 128 is interposed between the signal transmitting element 122 and the first signal receiving element 124. Among them, the other insulating member 128 is interposed between the signal transmitting member 122 and the second signal receiving member 126; in other words, the pen tip 12 is sequentially arranged in a direction away from the pen tip 10 as it moves away from the pen tip 10. The signal receiving member 126, the insulating member 128, the signal transmitting member 122, the insulating member 128, and the first signal receiving member 122. However, in actual implementation, the second signal receiving member 126 may also be arranged between the signal transmitting member 122 and the first signal receiving member 124, so that the pen tip 12 is sequentially moved away from the pen 10 in a direction away from the pen 10 The signal transmitting member 122, the insulating member 128, the second signal receiving member 126, the insulating member 128, and the first signal receiving member 122 are arranged.

Generally, when the stylus pen 1 is used for clicking or writing on the touch panel 3, the stylus pen 1 and the touch surface 3 of the touch panel 3 have an oblique angle other than 90 degrees. As shown in FIG. 1; therefore, the first signal receiving element 124 and the second signal receiving element 126 disposed on the pen tip 12 can individually receive at least one of a single specific frequency from the scan electrode Tx of the touch panel 3. Signal, there may be signal noise in the signal.

In FIG. 3, a first received signal S _RX1 that can be generated after the first signal receiving element 124 receives the signal is defined. There may be a first noise N _RX1 in the first received signal S _RX1 , and the second signal receiving element 126 receives receiving a second signal S _RX2 signal may be generated after the second reception signal S _RX2 noise may be present in a second N _RX2. Since the first signal receiving member 124 can directly contact the touch panel 3 and the second signal receiving member 126 is disposed farther away from the touch panel 3, the amplitude of the first received signal S _RX1 (labeled a1 in FIG. 3) ) Will be greater than the amplitude of the second received signal S _RX2 (labeled a2 in FIG. 3). In _summary , the amplitudes of the first received signal S _RX1 and the second received signal S _RX2 are inversely proportional to the distance between the first signal receiving element 124 and the second signal receiving element 126 and the touch surface 30 of the touch panel 3. Of course, the amplitude of the first noise N _RX1 in the first received signal S _RX1 will also be greater than the amplitude of the second noise N _RX2 in the second received signal S _RX2 .

Second, when a first frequency f1 of the first received signal is the same as a second frequency f2 of the second received signal.

FIG. 2 shows a circuit block diagram of the stylus pen of this creation. In FIG. 2, the stylus pen 1 further includes a signal processor 140, a control module 142, a differential processor 144, a pressure sensor 146, and a battery 148, which can be individually configured on the circuit board 14 shown in FIG. 1. It is also possible to process a signal from the touch panel 3 and send a driving signal S _TX to the touch panel 3 to perform a touch operation.

The differential processor 144 is electrically connected to the first signal receiving element 124 and the second signal receiving element 126. The differential processor 144 can receive the first receiving signal S _RX1 provided by the first signal receiving element 124 and the second signal receiving element 126 provided by the second signal receiving element 126. The received signal S _RX2 , and then performing a differential comparison between the first received signal S _RX1 and the second received signal S _RX2 can generate a differential signal S _D. In this embodiment, the amplitude of the differential signal S _D (labeled as a _D in FIG. 3) may be between the amplitude of the first received signal S _{RX1 and} the amplitude of the second received signal S _RX2 . However, it should be noted that, without departing from the scope of the present invention, the variation of this embodiment can make the amplitude of the differential signal S _D smaller than the amplitude of the first received signal S _{RX1 and} the amplitude of the second received signal S _RX2 at the same time. Amplitude Furthermore, there is the differential noise in the signal S _D (hereinafter referred to as the differential noise N _D) may be interposed in addition to noise amplitude of the first N _RX1 and between the amplitude of the second noise less than or simultaneous N _RX2 The amplitude of the first noise N _{RX1 and} the amplitude of the second noise N _RX2 .

Further, in another embodiment of the present writing, the amplitude of the differential signal S _D processor 144 generated by the difference (denoted as a _D in FIG. 3) and the amplitude of the differential noise N _D may be greater than the first difference A first difference between the amplitude of the received signal S _{RX1 and} the amplitude of the first noise N _RX1 ; wherein a second difference between the amplitude of the second received signal S _{RX2 and} the amplitude of the second noise N _RX2 is smaller than the aforementioned First difference.

Refer back to FIG. 2; the control module 142 is electrically connected to a differential processor 144, the differential signal S _D to receive the differential control module 144 provides the processor 142 may be provided through differential differential signal S _D processor 144 to determine the touch event event is valid or invalid operation event operation; wherein, for example, control module 142 may be determined by the differential signal S _D of the waveform, the amplitude of the touch event is determined to be valid or invalid operation event operation event.

More specifically, the control module 142 may include a microprocessor 1420, a programmable regulator 1422, and a comparator 1424. The programmable regulator 1422 is electrically connected to a power source Vcc, which is used to provide a reference voltage Vref. . The comparator 1424 is electrically connected to the programmable regulator 1422 and the differential processor 144 to receive the reference voltage Vref provided by the programmable regulator 1422 and the differential signal S _D provided by the differential processor 144. The control module 142 can be implemented by using an integrated circuit in addition to the electronic components shown in FIG. 2. Provided when actual operation, the comparator 1424 may not be less than the reference voltage Vref in a differential signal S _D (as a high potential) of the output signal to the microprocessor 1420 to inform the microprocessor 1420 of the touch event as a valid event operation; conversely does not provide an output signal, the comparator 1424 may be smaller than the reference voltage Vref in the differential signal to provide an output signal S _D or a microprocessor as a low voltage level to inform the microprocessor 1420 to 1420 of the touch event is invalid operation event.

If the control module 142 determines that a valid touch event is an event operation, control module 142 control module 142 can select the differential signal S _D and the control module 142 generates the other one of the touch event control signal S is active operation event _C signal processor 140 also provides I; wherein the differential signal S _D can carry relevant data, such as: type of stylus 1, the user selects the brush color, form, thickness, and applied by the user touch Pressure on pen 1 ... wait. However, it should be noted that, without departing from the scope of the invention, the control module 142 select the differential signal S _D, pressure sensor 146 provides a pressure signal S _P and the control signal S _C simultaneously provided to a signal processor 140; wherein the amplitude of the pressure signal S _P and the stylus is pressed against a force proportional to the value of the touch screen 3, meaning a stylus pressed against the touch screen larger power value 3, the pressure signal S _P greater amplitude; conversely, a stylus is pressed against the touch screen 3 power value is smaller, the amplitude of the pressure signal S _P is smaller.

The signal processor 140 is electrically connected to the first signal receiving element 124 and the signal transmission member 122; when the control module 142 select the differential signal and a control signal S _D S _C simultaneously provided to the signal processor 140, signal processor 140 then The control signal S _C can be integrated into the differential signal S _D to generate a driving signal S _TX for the touch panel 3 to perform touch operations.

When the control module 142 selects only the differential signal S _D, and the pressure signal S _P S _C while the control signal to the signal processor 140, signal processor 140 may then pressure signal and a control signal S _p S _C integrating the differential generating a signal S _D of the driving signal S _TX, so that the touch operation of the touch panel 3, for example, a pressure signal S _P may be displayed, for example, for determining the thickness of the strokes of the touch screen graphic 3. In particular note that the signal processor 140 will end the differential signal S _D for a predetermined time t and the other differential signal S _D junction has not yet occurred incorporated control signal S _C (and pressure signal S _P), FIG. 3 shown.

Finally, the signal processor 140 then sends the driving signal S _TX to the signal transmitting member 122, and transmits the driving signal S _TX to the touch screen 3 for touch operation.

Further, the control module 142 determines if the touch event is an event when an invalid operation, control module 142 will not provide a pressure signal S _P to the signal processor 140, the signal processor 140 to selectively direct the differential signal S _{D is} sent to the signal transmitting member 122 as the driving signal S _TX

To sum up, the touch signal processing method of the present invention can be executed as follows. First, the first signal receiver 124 is used to receive at least one signal of the same frequency generated by the touch panel 3 and generate at least one first received signal S _RX1 , and the second signal 126 receiver is used to receive the signal and generate at least one second Receive the signal S _RX2 . Then, the first received signal S _RX1 and the second received signal S _RX2 are calculated to generate a result value, and a driving signal S _TX is sent to the touch panel for touch operation according to the result value.

In the method described in the previous paragraph, calculating the first received signal S _RX1 and the second received signal S _RX2 to generate a result value includes: performing a differential comparison between the first received signal S _RX1 and the second received signal S _RX2 to generate a difference A signal S _D ; and sending a driving signal including the differential signal S _D and a control signal S _C when the differential signal S _{D is} greater than or equal to the reference voltage Vref to trigger an event corresponding to an effective touch operation.

In the method described in the preceding paragraph, further comprising: receiving a pressure signal S _P; and transmitting a differential signal comprising S _D, the control signal S _C and a pressure signal S _P of the driving signal to trigger events corresponding to the effective operation of the touch. Pressure signal S _P is the amplitude of the stylus is pressed against a force proportional to the value of the touch screen 3. More specifically words, if the power of the stylus is pressed against the touch screen 3 a value larger the amplitude of the pressure signal S _P is greater, the display can be more coarse in 3 strokes on the touch screen; the other hand, stylus 1 is pressed against the touch screen 3 power value is smaller, the amplitude of the pressure signal S _P is smaller, the strokes displayed on the touch screen 3 can be more finely.

In one embodiment the creation of the present embodiment, the control signal S _C and a pressure signal S _P to the end of the differential signal S _D S _D is incorporated in the differential signal after a predetermined time.

In the method described above, when the differential signal is less than the reference voltage, an event corresponding to an invalid touch operation is triggered.

The stylus pen 1 may further include a battery 148, which is used to provide power during operation of each element in the stylus pen 1. In FIG. 2, the battery 148 is electrically connected to the control module 142, which provides power to the control module 142, and the control module 142 performs power distribution to the signal transmitting member 122, the first signal receiving member 124, and the second The signal receiving part 126, the signal processor 140, the differential processor 144, and the pressure sensor 146 supply power; in actual implementation, the battery 148 may also directly receive the signal transmitting part 122, the first signal receiving part 124, and the second signal receiving part. The components 126, the signal processor 140, the control module 142, the noise comparator 144, and the pressure sensor 146 provide power.

Although this creation has been disclosed as above in implementation, it is not intended to limit this creation. Any person skilled in this art can make various modifications and retouches without departing from the spirit and scope of this creation, so the protection of this creation The scope shall be determined by the scope of the attached patent application.

1‧‧‧ Stylus

10‧‧‧pen

102‧‧‧Capacity

12‧‧‧writing

122‧‧‧Signal Transmission

124‧‧‧First Signal Receiver

126‧‧‧Second signal receiver

128‧‧‧ Insulation

14‧‧‧Circuit Board

3‧‧‧ touch panel

30‧‧‧Touch surface

140‧‧‧Signal Processor

142‧‧‧Control Module

1420‧‧‧Microprocessor

1422‧‧‧ Programmable regulator

1424‧‧‧ Comparator

144‧‧‧ Differential Processor

146‧‧‧Pressure sensor

148‧‧‧battery

N _D ‧‧‧ Differential Noise

N _RX1 ‧‧‧The first noise

N _RX2 ‧‧‧Second Noise

Rx‧‧‧Receiving electrode

S‧‧‧sensing unit

S _C ‧‧‧Control signal

S _D ‧‧‧ Differential signal

S _P ‧‧‧Pressure signal

S _RX1 , S _{RX1 '} ‧‧‧ the first received signal

S _RX2 ‧‧‧Second received signal

S _TX ‧‧‧Drive signal

Tx‧‧‧scan electrode

Vref‧‧‧Reference voltage

FIG. 1 is a schematic diagram of a stylus of the present invention for use with a touch panel; FIG.

FIG. 2 shows a circuit block diagram of the stylus pen of this creation; and

FIG. 3 is a waveform diagram of a first received signal, a second received signal, a differential signal, and a driving signal.

Claims (10)

A touch signal processing method includes: using a first signal receiving element to receive at least one signal of the same frequency generated by a touch panel and generating at least one first receiving signal; using a second signal receiving element to receive the signal and generating at least one A second received signal; calculating the first received signal and the second received signal to generate a result value; and sending a driving signal to the touch panel for touch operation according to the result value. The touch signal processing method according to claim 1, wherein the operation of the first received signal and the second received signal to generate the result includes: performing the first received signal and the second received signal. Performing a differential comparison to generate a differential signal; and sending the driving signal including the differential signal and a control signal when the differential signal is greater than or equal to a reference voltage to trigger an event corresponding to an effective touch operation. The touch signal processing method according to item 2 of the claim, further comprising: receiving a pressure signal; and sending the driving signal including the differential signal, the control signal, and the pressure signal to trigger an event corresponding to an effective touch operation. The touch signal processing method according to claim 3, wherein the control signal and the pressure signal are incorporated into the differential signal a predetermined time after the end of the differential signal to generate the driving signal. The touch signal processing method according to item 2 of the claim further includes: triggering an event corresponding to an invalid touch operation when the differential signal is less than the reference voltage. A stylus pen includes: a signal processor; a signal transmitting member electrically connected to the signal processor; a first signal receiving member electrically connected to the signal processor and receiving at least the same frequency generated by the touch panel A signal generates at least a first received signal; a second signal receiving element receives the signal and generates at least a second received signal; a differential processor is electrically connected to the first signal receiving element and the second signal receiving Components to calculate the first received signal and the second received signal to generate a differential signal; and a control module electrically connected to the signal processor and the differential processor, the control module is based on a reference voltage and the differential The signals are compared to generate a driving signal to the touch panel for touch operation. The stylus pen described in claim 6, wherein when the differential signal is greater than or equal to the reference voltage, the control module generates a control signal and passes the control signal and the differential signal to a signal processor. The signal processor incorporates the control signal into the differential signal to generate the driving signal to trigger an event corresponding to an effective touch operation. The stylus pen described in claim 6, wherein when the differential signal is less than the reference voltage, the control module passes the differential signal to a signal processor to trigger an event corresponding to an invalid touch operation. The stylus pen described in claim 6 further includes a pressure sensor, which is electrically connected to the control module and generates a pressure signal, wherein the control module transmits the pressure signal and the differential signal to The signal processor integrates the pressure signal into the differential signal to generate the driving signal to perform a touch operation on the touch panel. The stylus pen according to claim 9, wherein the control signal and the pressure signal are incorporated into the differential signal after one of the differential signals ends.