TW201743168A - The correction method for the active capactitive touch pen - Google Patents

Abstract

The invention provides a correction method for an active capacitive touch pen. The correction method for the active capacitive touch pen comprises the following steps. First, emitting an at least one signal to a touch input device by a pen tip of the active capacitive touch pen and an inductive coil of thereof, to trigger the touch input device, wherein the at least one signal is generated by the inductive coil. Then, received synchronous at least one signal transmitted from the pen tip of the active capacitive touch pen and the inductive coil of thereof. Determine whether the active capacitive touch pen is inclined to the touch input device according the wave pattern of the signal. An indicator position of the touch input device is corrected with a tip position of the active capacitive touch pen according to the wave pattern of the signal.

Description

Active capacitive stylus calibration method

The invention relates to a stylus and relates to an active capacitive stylus calibration method.

With the development of technology, the speed of 3C products is getting faster and faster, especially the touch-operated interface has become the trend and mainstream of the future development.

The touch-operated interface is mainly realized by a touch panel combined with a graphical operation interface of an operation system. The touch panel can be divided into a resistive touch panel, a capacitive touch panel, and an optical according to the principle of sensing. Touch panel, electromagnetic touch panel and ultrasonic touch panel.

The touch panel is configured to detect the position of the position stylus, thereby generating a corresponding indicator (or cursor) and interacting with the corresponding computer device. However, when the stylus is tilted to the touch panel, the tip of the stylus is not aligned with the indicator (or cursor) of the touch panel, that is, the position and touch of the indicator (or cursor) displayed by the touch panel. There is a drop in the position of the pen to be clicked, which causes the user to click the wrong position on the touch panel, which brings the user's inconvenience in operation.

The invention provides an active capacitive stylus calibration method, which can improve the accuracy of the active capacitive stylus click touch input device.

An embodiment of the present invention provides an active capacitive stylus calibration method, and the active capacitive stylus calibration method includes the following steps. An active capacitive stylus generates at least one signal by an induction coil, and at least one signal is transmitted to the touch input device through a tip and an induction coil of the active capacitive stylus to trigger the touch input device. At least one signal transmitted from the tip of the active capacitive stylus and the induction coil is synchronously received by an inductive loop in the touch input device. The touch input device determines whether the active capacitive stylus is tilted to the touch input device according to the waveform of each signal. The touch input device is calibrated to an index position based on the waveform of the signal.

Based on the above, in the active capacitive stylus calibration method of the present invention, the tip and the induction coil of the active capacitive stylus send at least one signal (for example, a sine wave signal, but the invention is not limited thereto) to the touch. The input device, the sensing circuit in the touch input device synchronously receives the pen tip and the induction coil to send at least one signal and convert the received at least one signal into a corresponding value (such as a voltage amount or a capacitance according to the touch input) The device is judged differently, and the touch input device is calibrated to its index position to conform to the tip position of the active capacitive stylus. In this way, the position of the tip of the active capacitive stylus is consistent with the position of the indicator of the touch input device, so that the effect of precise touch can be achieved, and the user can smoothly perform actions such as clicking, inputting, and dragging.

50‧‧‧Touch input device

52‧‧‧ touch surface

53‧‧‧Induction loop

54‧‧‧ indicator location

56‧‧‧ nib position

100‧‧‧Active capacitive stylus

110‧‧‧Sheet unit

112‧‧‧ nib

114‧‧‧Axis

116‧‧‧Induction coil

S‧‧‧ signal

Θ‧‧‧ tilt angle

S100‧‧‧Active capacitive stylus calibration method

S110~S140‧‧‧Steps

FIG. 1 is a flow chart of a method for calibrating an active capacitive stylus according to an embodiment of the invention.

FIG. 2 is a schematic diagram of the active capacitive stylus transmitting signal of the present invention.

FIG. 3 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention.

FIG. 4 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention.

FIG. 5 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention.

The specific embodiments of the present invention are further described below in conjunction with the drawings and embodiments. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention.

FIG. 1 is a flow chart of a method for calibrating an active capacitive stylus according to an embodiment of the invention. FIG. 2 is a schematic diagram of the active capacitive stylus transmitting signal of the present invention. FIG. 3 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention. FIG. 4 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention.

Please refer to Figure 1 first. The active capacitive stylus calibration method S100 of this embodiment includes the following steps S110 to S140.

In step S110, the active capacitive stylus 100 generates at least one signal S by an induction coil 116. The at least one signal S is transmitted to the touch through the tip 112 and the induction coil 116 of the active capacitive stylus 100. The input device 50 is controlled to trigger the touch input device 50.

As shown in FIG. 2, the active capacitive stylus 100 is tilted to the touch input device 100. The touch input device 50 is, for example, a capacitive touch panel. The touch input device 50 includes a touch surface 52 and an inductive loop 53. The active capacitive stylus 100 has a relative to the touch surface 52 An angle of inclination θ. The active capacitive stylus 100 includes a housing unit 110, a tip 112, an axis 114, and an induction coil 116, wherein the axis 114 passes through the tip 112.

The housing unit 110 further includes an inductance and a magnetic structure. When the magnetic structure generates a displacement variation relative to the induction coil 116, the induction coil 116 has an inductance variation, and the corresponding signal S is generated according to the inductance variation, and the induction is performed. The signal S generated by the coil 116 is transmitted to the pen tip 112 of the active capacitive pen 100 and transmitted to the touch input device 50. In addition, the embodiment can transmit the signal S to the touch input device 50 through the induction coil 116. .

It should be noted that the active capacitive stylus 100 mentioned in this embodiment does not need to calculate the pressure value of the active capacitive stylus 100 under the control unit of the MCU or the microprocessor. This embodiment is The signal S is transmitted directly to the touch input device 50 through the tip 112 and the induction coil 116 of the active capacitive stylus 100, which not only reduces the set volume of the integral active capacitive stylus 100, but also reduces the active capacitance. The manufacturing and production cost of the stylus pen 100 improves the ease of use of the active capacitive stylus 100.

In addition, the above signal S can be, for example, a string signal, but the invention is not limited thereto.

Referring to FIG. 1 again, in step S120, at least one of the pen tip 112 and the induction coil 116 from the active capacitive stylus 100 is synchronously received by an inductive loop 53 in the touch input device 50. Signal S.

In this embodiment, after the sensing circuit 53 in the touch input device 50 receives the at least one signal S transmitted from the pen tip 112 and the induction coil 116 of the active capacitive stylus 100, the following steps are further included. The sensing circuit 53 of the input device 50 displays the index position 54 on the touch surface 52 of the touch input device 50 according to the sensing result of the signal S (as shown in FIG. 3).

Then, in step S130, the touch input device 50 determines whether the active capacitive stylus 100 is tilted to the touch input device 50 according to the waveform change of each signal S.

In this embodiment, since the sensing circuit 53 in the touch input device 50 synchronously receives at least one signal S transmitted from the pen tip 112 and the induction coil 116 of the active capacitive stylus 100, the touch input device 50 The sensing circuit 53 can determine whether the active capacitive stylus 100 is tilted to the touch input device 50 by the signal S transmitted by the pen tip 112 and the induction coil 116.

For example, the inductive loop 53 in the touch input device 50 converts the signal transmitted by the nib 112 and the inductive coil 116 into a corresponding value (such as a voltage amount or a capacitance), which is determined according to the judgment of the touch input device. Differently, by comparing and calculating the above values, it can be known whether the active capacitive stylus 100 is tilted to the touch input device 50. Moreover, since the inductive loop 53 in the touch input device 50 receives at least one or more synchronization signals, the accuracy of the determination of the inductive loop 53 can be improved.

Further, in the embodiment, the signal S can be, for example, a sine wave signal, and the active capacitive stylus 100 emits a sine wave signal to the signal of the square wavy waveform emitted by the conventional stylus. The touch input device 50, whether the active capacitive stylus 100 is perpendicular to the touch input device 50, or the active capacitive stylus is tilted to the touch input device 50, the sine wave emitted by the active capacitive stylus 100 The magnetic field formed by the signal does not change, so the signal S received by the inductive loop 53 in the touch input device 50 does not change due to the swing position (such as the tilt state) of the active capacitive stylus 100.

When the active capacitive stylus 100 is tilted to the touch input device 50, as shown in FIG. 3, the touch surface 52 of the touch input device 50 has an index position 54 and a nib position 56. 54 is the direction in which the tip 112 of the active capacitive stylus 100 is connected along the axis 114. At the position where the touch surface 52 is displayed, the nib position 56 is a position where the nib 112 of the active capacitive stylus 100 is perpendicular to the touch input device 50.

As shown in FIG. 3, the nib position 56 of the nib 112 of the active capacitive stylus 100 does not conform to the index position 54 of the touch input device 50. In other words, the index position 54 of the touch input device 50 deviates from the nib position 56 of the nib 112 of the active capacitive stylus 100.

In step S130, if it is determined that the active capacitive stylus 100 is tilted to the touch input device 50, and by the above determination mechanism, it can be known that the index position 54 of the touch input device 50 is not aligned with the active capacitive stylus. The nib position 56 of the nib 112 of 100 proceeds to the following step S140.

Next, in step S140, the touch input device 50 is calibrated to an index position 54 according to the waveform of the signal S. Under this step, the index position 54 coincides with the nib position 56 (as shown in Figure 4).

Because the touch input device 50 is calibrated to the index position 54 of the active capacitive stylus 100 under the calibration step of the foregoing step S140, the index position 56 of the touch input device 50 is performed at this time. Allows the user to accurately click, input, drag, etc., thus achieving the effect of precise touch.

FIG. 5 is a schematic diagram of an operational embodiment of the active capacitive stylus of the present invention. The active capacitive stylus 100 of FIG. 5 is similar to the active capacitive stylus 100 of FIG. 4, wherein the same steps are denoted by the same reference numerals and have the same functions, and the description will not be repeated. .

As described above, whether the active capacitive stylus 100 is perpendicular to the touch input device 50, or the active capacitive stylus is tilted to the touch input device 50, the active capacitive stylus 100 transmits a signal S ( The area of the magnetic field formed by the sine wave signal does not change. Similarly, when When the active capacitive stylus 100 is tilted to the handwriting device 50, the active capacitive stylus 100 is rotated at the same tilt angle θ, and the magnetic field formed by the signal S (such as a sine wave signal) does not change, so The index position 54 can still be coincident with the nib position 56 by the calibration step of the aforementioned step S140 (as shown in Fig. 4). Therefore, the touch input device 50 is not affected by the tilt and rotation of the active capacitive stylus 100, and the touch input device 50 can still determine and calculate the corresponding coordinate value.

In summary, in the active capacitive stylus calibration method of the present invention, the tip and the induction coil of the active capacitive stylus send at least one signal (for example, a sine wave signal, but the invention is not limited thereto) to The touch input device, the sensing circuit in the touch input device synchronously receives the pen tip and the induction coil to send at least one signal and convert the received signal into a corresponding value (such as a voltage amount or a capacitance according to the touch input) The device is judged differently, and the touch input device is calibrated to its index position to conform to the tip position of the active capacitive stylus. In this way, the position of the tip of the active capacitive stylus is consistent with the position of the indicator of the touch input device, so that the effect of precise touch can be achieved, and the user can smoothly perform actions such as clicking, inputting, and dragging.

In addition, when the active capacitive stylus is tilted to the touch input device and rotated at the same tilt angle, the touch input device can still determine and calculate the relative coordinate value according to the waveform of the received signal, thereby making the touch The position of the indicator of the control input device coincides with the position of the nib, thereby significantly increasing the accuracy of the position of the active capacitive stylus touch input device.

The above description is only intended to describe the preferred embodiments or embodiments of the present invention, which are not intended to limit the scope of the present invention. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

S100‧‧‧Active capacitive stylus calibration method

S110~S140‧‧‧Steps

Claims (4)

An active capacitive stylus calibration method includes the following steps: an active capacitive stylus generates at least one signal by an induction coil, the at least one signal passing through a tip of the active capacitive stylus and the induction coil Transmitting to a touch input device to trigger the touch input device; receiving, by an inductive loop in the touch input device, the pen tip and the induction coil from the active capacitive stylus The touch input device determines whether the active capacitive stylus is tilted to the touch input device according to the waveform of each of the signals; and calibrates the touch input device to an index position according to the waveform of the signal . The active capacitive stylus calibration method according to the first aspect of the invention, wherein the sensing circuit of the touch input device displays on a touch surface of the touch input device according to the sensing result of each of the signals The location of the indicator. The active capacitive stylus calibration method according to the first aspect of the invention, wherein the touch input device is a capacitive touch panel. The method for calibrating an active capacitive stylus according to claim 1, wherein the signal is a sine wave signal.