TW201519015A - Input system and electromagnetic charging method - Google Patents

Abstract

An input system and its electromagnetic charging method are disclosed. The input system comprises a sensing device. The sensing device comprises a charging module and a processing module. The processing module is electrically coupled to the charging module. The charging module has M charging coils, and the M charging coils have the same centroid. The processing module is used for enabling N charging coils among the M charging coils with a driving signal according to a indicating signal so as to emit a charging electromagnetic wave.

Description

Input system and electromagnetic charging method

The present disclosure relates to an input system and an electromagnetic charging method, and more particularly to an input system and an electromagnetic charging method using a batteryless wireless pointing device.

Many tabletes currently used as input systems on the market are used with wireless pointing devices, such as wireless stylus pens and wireless mice. At present, the power supply required for the operation of the wireless pointing device mainly uses two methods to obtain power: one is powered by a disposable battery, and the other is obtained by using electromagnetic resonance. If the disposable battery is used, the wireless indicating device must frequently replace the battery, which is extremely inconvenient and environmentally friendly for the user. Therefore, the use of electromagnetic resonance is currently the most appropriate power supply.

However, in the current technology of electromagnetic indication power supply between the wireless pointing device and the digital tablet, the digital tablet must emit a large magnetic field, and then received by the wireless indicator component. When the wireless indicator component accumulates a certain amount of energy, it is then transmitted to the tablet for reception. This method has the problems of high power consumption of the digital board, complicated circuit design, high cost and high electromagnetic field radiation.

Therefore, how to reduce the power consumption of the tablet, simplify the design on the circuit, reduce the cost price and improve the problem of insufficient electromagnetic field at the edge of the tablet is a problem solved by the industry at present.

In view of the above problems, the present disclosure provides an input system and an electromagnetic charging method applicable to the input system, wherein the number of turns of the charging coil in the sensing device is adjusted by the signal sent by the indicating device, thereby adjusting the issued The strength of charging electromagnetic waves. In this way, the efficiency of charging can be adjusted according to the requirements of the pointing device, so that the indicating device can be connected without additional power supply.

An input system according to the present disclosure includes an inductive device. The sensing device comprises a charging module and a processing module. The processing module is electrically connected to the charging module. The charging module has M charging coils, wherein the centers of the M charging coils have the same horizontal position. The processing module is configured to enable N charging coils of the M charging coils by a driving signal to emit a charging electromagnetic wave according to an indication signal, wherein M is a positive integer greater than 1, and N is a positive integer not greater than M.

According to an electromagnetic charging method of the present disclosure, N charging coils having the same enabling position are included to charge the indicating device. And, the indication signal is transmitted by the pointing device. And, the number and position of the N enabled charging coils are adjusted according to the indication signal, where N is an integer greater than zero.

In summary, the input system of the present disclosure is applicable to this In the electromagnetic charging method of the input system, the sensing device can determine whether to provide a stronger or weaker charging electromagnetic wave to the indicating device according to the indication signal sent by the indicating device, thereby improving the power usage efficiency of the input system.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

1‧‧‧Input system

11‧‧‧Induction device

111‧‧‧Charging module

111a‧‧‧First charging coil

111b‧‧‧second charging coil

111c‧‧‧third charging coil

113‧‧‧ receiving module

115‧‧‧Processing module

117a~b‧‧‧Multiplexer

13‧‧‧ indicating device

131‧‧‧Signal Transmitter Module

133‧‧‧Power sensor module

Ss‧‧ indication signal

Sf‧‧‧Charging electromagnetic waves

S410~S460‧‧‧Steps

1 is a schematic diagram of an apparatus of an input system in accordance with an embodiment of the present disclosure.

2 is a functional block diagram of an input system in accordance with an embodiment of the present disclosure.

Figure 3 is a side cross-sectional view of the sensing device in accordance with an embodiment of the present disclosure.

FIG. 4 is a schematic flow chart of a charging method according to an embodiment of the present disclosure.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention. In the present specification, M is a positive integer greater than 1, and N is a positive integer not greater than M.

Please refer to FIG. 1 , which is an input according to an embodiment of the present disclosure. Schematic diagram of the system. As shown in FIG. 1, the input system 1 includes an inductive device 11 and a pointing device 13. The pointing device 13 can be connected to the sensing device 11 only by radio. Next, please refer to FIG. 2, which is a functional block diagram of an input system according to an embodiment of the present disclosure. As shown in FIG. 2, the sensing device 11 in the input system 1 includes a charging module 111, a receiving module 113, and a processing module 115. The processing module 115 is electrically connected to the charging module 111 and the receiving module 113 respectively. On the other hand, the pointing device 13 in the input system 1 includes a signal transmitting module 131 and a power sensing module 133 that are electrically connected to each other. Further, the sensing device 11 and the pointing device 13 transmit signals and energy through the radio.

The charging module 111 has M charging coils, and the horizontal positions of the centers of each of the M charging coils are the same. Please refer to FIG. 3 , which is a side cross-sectional view of the sensing device according to an embodiment of the present disclosure. As shown in FIG. 3, the sensing device 11 has a first charging coil 111a, a second charging coil 111b, and a third charging coil 111c. The first charging coil 111a is located above the second charging coil 111b, and the second charging coil 111b is located above the third charging coil. Although the three charging coils 111a to 111c are equal in size as illustrated, they may actually be unequal. In addition, in the embodiment, although three charging coils are exemplified, those skilled in the art can adjust the number of coils according to actual needs, which may be two, four or more. The disclosure is not based on this embodiment. Limited. Moreover, in another embodiment, a plurality of charging coils may be arranged in a concentric manner, for example, the first charging coil may be Located on the innermost side, the second charging coil surrounds the first charging coil, and the third charging coil surrounds the second charging coil.

The receiving module 113 is configured to receive an indication signal. As shown in Fig. 2, the pointing device 13 issues an indication signal Ss, and the receiving module receives the indication signal Ss. In one embodiment, the indicating device 13 is an electro-magnetic stylus, and the indication signal Ss is presented in a manner that the electromagnetic field changes. In this case, the receiving module 113 may include multiple receiving coils for Induced electromagnetic field changes. In accordance with the spirit of the present disclosure, those skilled in the art can use an appropriate receiving module according to the pointing device. The disclosure is not limited to the above embodiments.

The processing module 115 is configured to enable N charging coils of the M charging coils to generate a charging electromagnetic wave by using one driving signal according to the indication signal Ss received by the receiving module 113. Taking FIG. 3 as an example, M is equal to 3, and there is a multiplexer 117a between the first charging coil 111a and the second charging coil 111b. The multiplexer 117a is used to directly connect the first charging coil 111a to the processing mode. The driving circuit in the group 115 or the first charging coil 111a is connected to the second charging coil 111b. Meanwhile, a multiplexer 117b is disposed between the second charging coil 111b and the third charging coil 111c, and the multiplexer 117b is used to directly connect the second charging coil 111b to the driving circuit in the processing module 115, or The second charging coil 111b is connected to the third charging coil 111c. According to the spirit of the disclosure, the processing module 115 can be an application-specific integrated circuit (ASIC), an advanced reduced instruction set. The present invention is not limited herein by an advanced RISC machine (ARM), a central processing unit (CPU), a single-chip controller, or other device suitable for performing arithmetic and control instructions.

Therefore, when the processing module 115 determines that a charging coil is enabled by the driving signal, the processing module 115 can control the multiplexer 117a to electrically connect the first charging coil 111a to the processing module 115. In this case, when the processing module 115 sends a driving signal, the second charging coil 111b and the third charging coil 111c are not driven by the driving signal, so only the first charging coil 111a is enabled to emit the charging electromagnetic wave. Sf.

When the processing module 115 determines that the two charging coils are enabled by the driving signal, the processing module 115 can control the multiplexer 117a and the multiplexer 117b to electrically connect the first charging coil 111a to the second charging coil 111b. The second charging coil 111b is electrically connected to the processing module 115. In this case, when the processing module 115 sends a driving signal, the third charging coil 111c is not enabled by the driving signal, so only the first charging coil 111a and the second charging coil 111b are enabled to emit the charging electromagnetic wave. Sf.

When the processing module 115 determines to enable the three charging coils with the driving signal, the processing module 115 can control the multiplexer 117a and the multiplexer 117b to electrically connect the first charging coil 111a to the second charging coil 111b. The second charging coil 111b is electrically connected to the third charging coil 111c. In this case, when the processing module 115 issues a drive signal, the charging coils 111a to 111c are both enabled to emit the charged electromagnetic wave Sf.

By way of example, the processing module 115 can control the number of enabled charging coils. Therefore, the processing module 115 can control the intensity of the emitted charging electromagnetic wave Sf according to requirements, thereby increasing or decreasing the efficiency of charging the indicating device 13. .

The signal transmitting module 131 in the pointing device 13 is configured to transmit the aforementioned indication signal Ss. As shown in the foregoing embodiment, if the indicating device 13 is an electromagnetic stylus, the indication signal Ss is presented in a manner that the electromagnetic field changes. In other words, the signal transmitting module 131 can be a coil for When it is enabled, it emits electromagnetic waves of a specific frequency range. In an embodiment, the indication signal Ss may be a simple electromagnetic wave, and the sensing device 11 detects the received electromagnetic wave to determine the position of the pointing device 13. In another embodiment, the indication signal Ss may be a signal transmitted by electromagnetic waves of a specific frequency, including a position signal and a state of charge signal. The indication signal Ss may be a frequency modulated signal (FM), an amplitude modulated signal (AM), or other specific modulated electromagnetic signal suitable for transmitting a message. The disclosure is not limited thereto.

The power sensing module 133 of the indicating device 13 is electrically connected to the signal transmitting module 131. The power sensing module 133 is configured to convert the charging electromagnetic wave Sf to generate the power-enabled signal transmitting module 131. Therefore, the power sensing module There is at least one induction coil in 133. In an embodiment, the power sensing module 133 further has a rectifying circuit to rectify the AC electromotive force converted by the inductive coil due to the inductive charging electromagnetic wave Sf.

A detailed description of how the processing module 115 determines how many charging coils are to be enabled is detailed below. In an embodiment of the disclosure, the processing module 115 determines to increase or decrease the number of enabled charging coils according to the intensity of the indication signal Ss received by the receiving module 113. For example, the processing module 115 is provided with a first preset value and a second preset value, wherein the first preset value is smaller than the second preset value.

In an embodiment, the processing module 115 may include a comparator for determining whether the strength of the received indication signal Ss is higher than a first preset value and lower than a second preset value. If the intensity of the received indication signal Ss is lower than the first preset value, the processing module 115 determines that the indicating device 13 does not obtain sufficient power, that is, the intensity of the charging electromagnetic wave Sf currently emitted by the charging coil is insufficient. At this point, the processing module 115 will select to enable more charging coils. For example, if there is only the first charging coil 111a, the processing module 115 selects to additionally enable the second charging coil 111b. Therefore, the multiplexer 117a and the multiplexer 117b are controlled to make the first charging coil 111a. The second charging coil 111b is electrically connected to the second charging coil 111b, and is electrically connected to the processing module 115. Thereby, the processing module 115 is equal to enabling one charging coil by the driving signal, and the charging electromagnetic wave Sf emitted by the first charging coil 111a and the second charging coil 111b is greater than that emitted by only the first charging coil 111a. The electromagnetic wave Sf is charged so that the indicating device 13 can obtain more electric energy.

Conversely, if the received indication signal Ss is stronger than the first The two preset values, the processing module 115 determines that the indicating device 13 does not obtain excessive power, that is, the intensity of the charging electromagnetic wave Sf currently emitted by the charging coil is too large, which may cause waste of electrical energy. At this time, the processing module 115 selects the charging coil of the enabling portion. For example, if the current first charging coil 111a to the third charging coil 111c are all connected together and the driving signal is enabled, the processing module 115 selects to disable the enabling of the third charging coil 111c, and therefore, controls The multiplexer 117a and the multiplexer 117b connect the first charging coil electrical property 111a to the second charging coil 111b, and the second charging coil 111b is not electrically connected to the third charging coil 111c, but with the processing module. 115 electrical connection. Thereby, the processing module 115 is equal to disabling the third charging coil 111c, and the charging electromagnetic wave Sf emitted by the first charging coil 111a and the second charging coil 111b is smaller than the charging by the first charging coil 111a to the third charging coil 111a. The coil 111c is simultaneously enabled to emit a charged electromagnetic wave Sf, thereby enabling the indicating device 13 to obtain less electric energy to reduce unnecessary power consumption.

In another embodiment, when the indication signal Ss sent by the indication device 13 includes a charging state signal for indicating whether the pointing device 13 obtains sufficient power, the processing module 115 may include a logic operation unit, and the processing module 115 The logic unit in the middle will directly determine whether the indicating device 13 obtains sufficient power according to the state of charge signal. If the information in the charging status signal indicates that the indicating device 13 does not obtain sufficient power, the processing module 115 additionally enables the charging coil with the driving signal. If the information in the charging status signal indicates that the indicating device 13 obtains excessive power, Processing module 115 will be released The charging coil is enabled to be partially activated, the method of which is detailed above, and will not be described herein. In addition, although the processing module 115 can only additionally enable or deactivate one charging coil at a time according to the foregoing method, the processing module 115 can additionally enable or deactivate the plurality of charging coils at one time.

The operation flow of the processing module in an embodiment can be briefly described as follows. Please refer to FIG. 1 to FIG. 4 together. FIG. 4 is a schematic flowchart of a charging method according to an embodiment of the present disclosure. As shown in step S410, the processing module 115 enables N charging coils with drive signals. At this time, the pointing device 13 receives the charging electromagnetic wave Sf emitted by the N charging coils, and transmits the indication signal Ss according to the obtained electric energy. After receiving the indication signal Ss, the processing module 115 determines whether the power of the indication signal Ss is less than the first preset value. If the processing module 115 determines that the power of the indication signal Ss is less than the first preset value, the processing module 115 additionally enables at least one charging coil with the driving signal as shown in step S430. If the processing module 115 determines that the power of the indication signal Ss is not less than the first preset value, the processing module 115 determines whether the power of the indication signal Ss is greater than the second preset value, as shown in step S440. If the processing module 115 determines that the power of the indication signal Ss is greater than the second preset value, the processing module 115 deactivates the at least one charging coil as shown in step S450. If the processing module 115 determines that the power of the indication signal Ss is not greater than the second preset value, the processing module 115 ends without performing other actions as shown in step S460, until the power of the next indication signal is less than the first preset value. Or a condition greater than the second preset value occurs.

The actual operation and effect of the method of the present disclosure will be explained below by way of practical examples. Returning to FIG. 1, in an embodiment, if the pointing device 13 is moved to the edge of the sensing device 11, the charging electromagnetic wave Sf received by the pointing device 13 is received because the magnetic field strength of the charging coil is low. The strength is low. At this time, the pointing device 13 cannot obtain sufficient electric energy, so the intensity of the indication signal Ss emitted by it is also weak (even if the indication signal cannot be issued). When the sensing device 11 finds that the intensity of the indication signal Ss is insufficient, the processing module 115 in the sensing device 11 generates more charging coils with the driving signal, so that the intensity of the emitted charging electromagnetic wave Sf rises, and the indicating device 13 get enough power.

At this time, if the pointing device 13 moves back to the center of the sensing device 11, since the magnetic field strength here is high, the intensity of the charged electromagnetic wave Sf received by the pointing device 13 is high. At this time, the electric energy obtained by the pointing device 13 exceeds the electric energy required by it, and the intensity of the indication signal Ss emitted by it is also strong. Therefore, when the sensing device 11 finds that the intensity of the indication signal Ss is too high, the processing module 115 in the sensing device 11 releases the charging coil of the enabling portion, so that the intensity of the emitted charging electromagnetic wave Sf decreases, thereby reducing the electric energy. waste. Similarly, when the pointing device 13 is away from or close to the sensing device 11, the processing module 115 in the sensing device 11 can also enhance the power obtained by the indicating device 13 or reduce the waste of electric energy by the above principle.

In summary, according to the input system implemented by the embodiment of the disclosure, the sensing device can be determined according to the indication signal sent by the indicating device. Whether to provide a stronger or weaker charging electromagnetic wave to the indicating device, so that the indicating device can obtain sufficient electric energy, and when the indicating device has too much electric energy, the waste of electric energy can be reduced, thereby improving the power consumption efficiency of the input system. .

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

11‧‧‧Induction device

111‧‧‧Charging module

113‧‧‧ receiving module

115‧‧‧Processing module

13‧‧‧ indicating device

131‧‧‧Signal Transmitter Module

133‧‧‧Power sensor module

Ss‧‧ indication signal

Sf‧‧‧Charging electromagnetic waves

Claims (11)

An input system comprising: a sensing device comprising: a charging module having M charging coils, wherein a center position of the M charging coils is the same; and a processing module electrically connected to the charging module And a group for enabling N charging coils of the M charging coils to emit a charging electromagnetic wave by a driving signal according to an indication signal, wherein M is a positive integer greater than 1, and N is a positive integer not greater than M. The input system of claim 1, further comprising: a pointing device for transmitting the indication signal, the indicating device comprising: a signal transmitting module for transmitting the indication signal; and a power sensing module, The signal transmission module is connected to the signal transmission module and has an induction coil for converting the charging electromagnetic wave to enable the signal transmission module. The input system of claim 2, wherein the indication signal comprises a position signal and a charging state signal, and the processing module determines the position of the indicating device according to the position signal, and according to the charging state signal, the driving signal The N charging coils are enabled to emit the charging electromagnetic waves. The input system of claim 3, wherein the processing module comprises a logic operation unit, configured to determine, according to the state of charge signal, whether the power generated by the energy sensing module is lower than a first preset value or higher than one Second preset a value, when the charging state signal indicates that the electric energy generated by the electric energy sensing module is less than the first preset value, enabling at least one of the unenabled coils of the M charging coils; when the charging state signal When the electric energy generated by the electric energy sensing module is greater than the second preset value, at least one of the N charging coils is deactivated. The input system of claim 1, wherein the processing module includes a comparator for generating the driving signal to enable the N charging coils of the M charging coils to transmit the charging according to the strength of the indication signal. Electromagnetic waves. The input system of claim 5, wherein when the intensity of the indication signal is less than a first predetermined value, at least one of the unenabled coils of the M charging coils is enabled; when the indication signal When the intensity is greater than a second predetermined value, at least one of the N charging coils is deactivated. The input system of claim 1, wherein the sensing device further comprises a receiving module electrically connected to the processing module for receiving the indication signal. An electromagnetic charging method comprising: enabling N charging coils to charge a pointing device; transmitting, by the indicating device, an indication signal, wherein a horizontal position of the center of the N charging coils is the same; and adjusting according to the indication signal The number and position of the N enabled charging coils, where N is an integer greater than zero. The electromagnetic charging method of claim 8, wherein the indication signal comprises a position signal and a state of charge signal, the position signal being used to represent the indication The location of the device, the state of charge signal is used to indicate the electrical energy received by the pointing device. The electromagnetic charging method of claim 9, wherein when the charging state signal indicates that the power received by the indicating device is less than a first preset value, increasing the number of N; when the charging state signal indicates that the indicating device receives When the electric energy is greater than a second preset value, the number of N is decreased. The electromagnetic charging method of claim 8, wherein the number of N is adjusted according to the intensity of the indication signal; for example, when the intensity of the indication signal is less than a first preset value, increasing the number of N; for example, when the indication signal When the intensity is greater than a second predetermined value, the number of N is decreased.