CN106775020A - capacitance pen - Google Patents

Abstract

The invention relates to a capacitive pen communicating with a capacitive touch device, comprising: a hollow shaft; and a cartridge including a cartridge body portion and a tip portion, wherein the cartridge body portion is accommodated inside the barrel, the tip portion is exposed to the outside from one end of the barrel, at least a part of an outer surface of the tip portion is made of a conductive material, and wherein the cartridge body portion contains therein a material writable on a general writing medium via the tip portion; and the control unit is accommodated in the pen holder and is used for controlling the pen point part to send signals to the capacitive touch equipment.

Description

Capacitive pen

technical field

The invention relates to a capacitive pen, in particular to a capacitive pen capable of writing on a common writing medium and a capacitive touch device at the same time.

Background technique

With the development of information technology, electronic devices such as portable mobile devices are more and more closely related to people's lives. Such a portable mobile device can receive user input, and perform user desired functions according to the input. As an input device for receiving user input, touch devices are widely used due to their advantages of small size, light weight and easy operation.

Touch devices are mainly divided into two types, resistive touch devices and capacitive touch devices. Resistive touch devices are low in cost and easy to manufacture, but they can only support single-finger operation. The capacitive touch device has strong operability and supports multi-finger function, so it has become the first choice of the touch device at present.

The capacitive touch device includes a capacitive touch screen. The capacitive touch screen can sense the capacitance change caused by the touch of a finger (or stylus) through the orthogonal capacitance pattern distributed thereon, so as to measure the touch position and touch intensity. The capacitive touch screen can be a transparent panel located in front of the capacitive touch device, or it can be an opaque human-computer interaction board.

Since the conductive body that can be sensed by the touch screen needs a large contact area, it will cause the problem of inaccurate positioning, and at the same time, the support for the pen has not been very ideal. Therefore, people expect capacitive touch devices to support pen writing, at least including functions such as slim pen tip, suspension sensing, precise positioning, and precise pressure sensitivity.

The active capacitive pen solves the above problems, and it is a capacitive pen used in conjunction with a capacitive touch screen. The active capacitive pen can send a pulse signal synchronized with the capacitive touch screen, which enhances capacitive sensing, thereby reducing the contact area, while the thin tip significantly enhances the user experience.

FIG. 1 shows a schematic diagram of the working principle of an active capacitive pen and a capacitive touch device.

As shown in Figure 1, the touch control device includes: a panel, on which are configured parallel capacitive plates orthogonal to each other for sending and receiving signals; sending capacitive plates, which are arranged on the panel, and are used to send out detection Wave; pen 11, which receives the command information sent by the panel through the nib, and then sends signal waves to the panel through the nib; the receiving capacitor plate, which is arranged on the panel, is used to receive the detection of the sending capacitor plate wave and the signal wave of the pen; the analog signal processing unit, which sends the corresponding waveform according to the capacitor plate selected by the control processing unit, or pre-processes the signal from the receiving capacitor plate; the control processing unit 14 of the panel, which will pre-process The processed received signal is mapped into a digital signal through AD, and the touch position is obtained through processing. In the case of a capacitive pen, the position of the pen and the information returned by the pen are obtained.

However, the traditional active capacitive pen is mainly used for writing, positioning and key operation with capacitive touch media such as tablets, electronic whiteboards, mobile phones, and capacitive touch panels. The nib is usually made of ordinary metal, POM, TPU and other materials that are conducive to writing on media such as screens. Materials of this type do not leave marks on the medium on which they are written. The capacitive pen detects the pressure change of the pen tip and sends this pressure information to the capacitive screen. At the same time, the capacitive screen receives the positioning information of the pen tip, so that it can restore and simulate the actual handwriting written by the user for display or storage.

But no matter what kind of capacitive pen, writing can only store and restore handwriting information on electronic devices, and cannot display it on other media at the same time. For example, if you need to leave writing marks on paper, you can only store it first and then print it out through a printer; or write on paper and then scan it into an electronic device; or you need to print it on paper through a printer. This undoubtedly increases the cost of hardware consumables, and at the same time increases the difficulty of use for users with special needs. For example, in some occasions that need to be recorded, it is necessary to record on paper media in real time, and at the same time store or project on electronic equipment, which cannot be realized through the existing capacitive pen solution.

Contents of the invention

To solve this problem, the present invention proposes a capacitive pen capable of writing on common writing media and capacitive touch devices at the same time.

The present invention provides a capacitive stylus for communicating with a capacitive touch device, comprising: a hollow pen barrel; Inside the pen holder, the front end of the nib part is exposed to the outside of the pen holder, and wherein, the main body part of the pen core contains materials that can be written on common writing media through the nib part; the control unit is contained in the The inside of the pen holder is used to control the capacitive pen to send a signal to the capacitive touch device.

Preferably, the first refill is made of conductive material, the main part of the refill is connected to the control unit, and the tip part sends signals to the capacitive touch device.

Preferably, the pen holder is made of non-conductive material.

Preferably, the pen barrel is made of conductive material, and the nib portion is electrically insulated from the pen barrel.

Preferably, the first pen core is made of a non-conductive material, at least a portion of the pen holder close to the pen tip is made of a conductive material, and the at least a part of the pen holder is connected to the control unit. Connect and send signals to the capacitive touch device.

Preferably, the material contained in the main body of the refill is ink or ink.

Preferably, the first refill is detachable.

Preferably, the capacitive pen further includes: a second refill made of conductive material; and a switching unit, configured to switch between the first refill and the second refill, so that one of them protrudes The outside of the barrel, while the other is retracted inside the barrel.

Preferably, the capacitive stylus further includes a pressure-sensitive measuring unit accommodated inside the pen holder for measuring the pressure of the pen tip on the capacitive touch device.

Preferably, the capacitive stylus further includes a power supply unit located in the pen holder, for providing power to the control unit and the pressure-sensitive measurement unit.

Preferably, the capacitive pen further includes at least one key unit arranged on the pen holder, the at least one key unit is connected to the control unit and is configured to be connected between the capacitive pen and the capacitive touch screen Implement the specified functions when communicating.

The capacitive pen of the present invention can write on the common writing medium and the capacitive touch screen at the same time, improves the efficiency of information entry, solves the problem that the capacitive pen in the prior art cannot write on the common writing medium, and can cope with complex application environments, Moreover, the refill can be replaced after the ink is used up, and it can also be switched to an ordinary capacitive pen at any time, thus meeting the increasing requirements of users for information entry.

Description of drawings

The accompanying drawings are used together with the text description to further illustrate the embodiments of the present invention. in:

FIG. 1 shows a schematic diagram of the working principle of an active capacitive pen and a capacitive touch device.

Fig. 2 shows a schematic block diagram of the capacitive pen of the present invention.

Fig. 3 shows a schematic structural view of the capacitive pen of the present invention.

Fig. 4 shows the working flowchart of the capacitive pen of the present invention.

Fig. 5 shows an example of application of the capacitive pen of the present invention.

detailed description

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In all the drawings, the same reference numerals denote the same elements, and their repeated descriptions are omitted.

Fig. 2 shows a schematic block diagram of the capacitive pen of the present invention.

Referring to FIG. 2 , the capacitive pen 10 of the present invention includes a hollow pen barrel 100 and a pen core. The refill includes a refill body portion 102 and a nib portion 104 . The refill main body 102 is housed inside the pen barrel 100 , and the pen tip 104 is exposed from one end of the pen barrel 100 to the outside.

The main body portion 102 of the refill contains materials that can be written on common writing media via the nib portion 104 .

As shown in FIG. 2 , the capacitive stylus 10 further includes a control unit 106 housed inside the pen holder 100 for controlling the pen tip 104 to send signals to the capacitive touch device.

Preferably, at least a part of the tip portion 104 away from the main body portion 102 of the pen core is made of conductive material for capacitive coupling with the capacitive touch device. In addition, the cartridge can be made of conductive material, and the cartridge main body 102 is connected to the control unit 106 . In this way, the control unit 106 can send the signal to be sent to the capacitive touch device to the tip part 104 through the main part of the refill 102 .

In addition, in the capacitive pen 10 , the pen holder 100 can be made of conductive material, and the control unit 106 can send signals to the capacitive touch device through the pen holder 100 . In this case, preferably, the conductive outer surface of the tip portion 104 is electrically insulated from the barrel 100 .

In addition, the main body part 102 of the pen core can also be made of a non-conductive material, and at least a part of the pen holder 100 close to the pen tip part 104 is made of a conductive material. Moreover, at least a part of the pen holder 100 is connected with the control unit 106 and sends a signal to the capacitive touch device. In the case that the refill main body 102 is made of a non-conductive material and the pen holder 100 is made of a conductive material, the capacitive pen 10 sends and receives signals through the pen holder 100 to complete, therefore, common ink refills can be used, for example: in daily life The ballpoint refills used, etc., thereby improving the versatility of the refills.

Through the nib portion 104, on the one hand, the capacitive pen 10 of the present invention can communicate with capacitive touch devices, and on the other hand, the capacitive pen 10 of the present invention can write on common writing media such as paper.

Preferably, in the capacitive pen 10 of the present invention, the material contained in the refill body 102 may be ink or ink. That is to say, the capacitive pen 10 can realize the same writing function as an ordinary ink pen, ballpoint pen or signature pen.

In addition, in the capacitive pen 10 of the present invention, the pen core is detachable. When the material contained in the refill body portion 102 is used up, the user can open the capacitive pen 10 and replace the old refill with a new refill. Alternatively, the user can replace the refill in the capacitive stylus 10 with a common conductive material, thereby converting the capacitive stylus 10 into a common capacitive stylus, and writing directly on the capacitive touch device.

In another preferred embodiment of the capacitive pen 10 of the present invention, a common capacitive pen refill and the above-mentioned refill are set in the pen holder 100, and the two pens can be connected by a specific mechanical structure arranged on the outer surface of the pen holder 100. The refill can be switched freely, for example, the refill switching structure of existing two-color pens on the market.

The structure of the capacitive pen 10 of the present invention will be described in detail below with reference to FIG. 3 .

As shown in FIG. 3 , the capacitive pen 10 of the present invention may include a pen holder 100 , a core body 102 , a pen tip 104 , a control unit 106 , a pressure sensing unit 108 , a power supply unit 110 and a key unit 112 .

The control unit 106 is used to control the pressure sensing component 108 to measure the pressure of the pen tip 104 and control the capacitive stylus 10 to send a signal to the capacitive touch device. The capacitive touch device can determine the position of the capacitive stylus 10 according to the signal, and at the same time, the capacitive touch device can obtain information including the pressure sensitivity information of the capacitive stylus 10 , key information, ID number, battery power and other information from the signal.

The pressure-sensitivity measurement unit 108 is accommodated inside the pen barrel 100 and is used to measure the pressure of the pen tip 104 on the capacitive touch device. The pressure sensing unit 108 provides the measured pressure to the control unit 106, and the control unit 106 generates a signal to be sent to the capacitive touch device according to the pressure.

The power supply unit 110 is located in the pen holder 100 , preferably at the tail of the capacitive pen 10 , for providing power to the control unit 106 and the pressure-sensitive measurement unit 108 .

Preferably, the power supply unit 110 can be a button battery, a rechargeable battery or a supercapacitor.

As shown in FIG. 3 , at least one key unit 112 may also be provided on the pen holder 100 . The button unit 112 is connected with the control unit 106 and is configured to realize a prescribed function when the capacitive stylus 10 communicates with the capacitive touch device.

For example, the button unit 112 can be configured to perform specific operations such as left and right buttons of a mouse. The buttons can be defined by the user as functions similar to the left and right buttons of a mouse, or can be defined by the user to implement functions such as eraser, screen capture, random drawing of a specific shape area on the screen, and cropping, moving, and editing.

In addition, the capacitive pen 10 of the present invention also includes a sending circuit. The sending circuit is arranged between the control unit 106 and the refill, and provides the refill with data to be sent to the capacitive touch device under the control of the control unit 106 .

Due to the above structure, the capacitive pen 10 of the present invention can simultaneously leave the same content on common writing media, such as paper, and electronic devices with touch screens.

The operation method of the capacitive pen 10 of the present invention will be described below with reference to FIG. 4 .

As shown in FIG. 4, the capacitive pen 10 writes on the paper placed on the surface of the capacitive touch device 20. At this time, the ink or ink in the main body part 102 of the pen core is applied on the paper along with the nib part 104, realizing Writing on common writing media. At the same time, the control unit 106 of the capacitive stylus 10 generates a signal, sends it to the sending circuit, is converted into a sending signal by the sending circuit, and sends the sending signal to the capacitive touch device 20 through the pen tip 104 . The capacitive touch device 20 receives the transmission signal, and obtains data such as position information of the capacitive pen 10 according to the transmission signal.

In addition, although not shown in FIG. 4 , the capacitive stylus 10 may include a pressure-sensitive measurement unit 108 (refer to FIG. 3 ). The pressure-sensitive measuring unit 108 includes a pressure sensor and a measuring element. The pressure applied by the nib part 104 is obtained by the pressure sensor in the pressure-sensitive measuring unit 108. The pressure sensor is connected with the main body part 102 of the pen core. When pressure is applied, the pressure sensor will produce corresponding changes, such as capacitance changes, resistance changes, etc.

The measuring element in the pressure-sensitive measuring unit 108 can measure this change, thereby obtaining the pressure of the pen tip portion 104 . After the pressure sensing unit 108 obtains the pressure information of the pen tip 104 , it sends it to the control unit 106 . Then, the control unit 106 encodes the pressure related information of the pen tip 104 into the transmission signal according to a preset communication protocol, and then sends the transmission signal carrying the pressure information of the pen tip 104 to the capacitive touch device 20 through the pen tip 104 .

Optionally, a receiving coil is provided outside the pen tip 104 of the capacitive pen 10 , and the receiving coil is located inside the pen barrel 100 . The receiving coil receives the data transmitted from the capacitive touch device 20 and provides it to the receiving circuit. The receiving circuit processes the received data and sends it to the control unit, so as to realize the interaction between the capacitive pen 10 and the capacitive touch device 20 .

An application example of the capacitive pen of the present invention will be described below with reference to FIG. 5 .

In some occasions where recording is required, the user not only needs to record the content on a paper medium in real time, but also needs to store or project the content on an electronic device. The capacitive pen 10 of the present invention can realize this function.

As shown in FIG. 5 , a paper 30 is placed on the capacitive touch screen of the electronic device 20 . The user uses the capacitive pen 10 to write on the paper 30 , such as drawing a curve as shown in FIG. 5 .

During this process, the capacitive pen 10 and the electronic device record the same curve on the capacitive touch screen through capacitive coupling.

The electronic device 20 can be connected to the PC 40 by wire or wirelessly. In this case, the electronic device 20 transmits the recorded curve drawn by the capacitive pen 10 to the PC 40, and the PC 40 can simultaneously display the curve on its display and store the relevant data. The user can then read the data for further editing process.

In addition, the electronic device 20 can also be connected to the projector 50 in a wired or wireless manner. In this case, the projector 50 can project the curve drawn by the capacitive pen 10 recorded by the electronic device 20 . This is especially beneficial when presenting to a larger audience, such as large conferences.

The capacitive pen of the prior art can only write on the capacitive touch screen, although the content is electronically recorded, it cannot leave a paper record. For example, in a drawing application, users may also want to keep their manuscripts as souvenirs. After all, files in electronic format are too easy to be copied and have insufficient collection value.

At the same time, the writing pen of the prior art cannot write on the capacitive touch screen. In the occasions where contracts and other agreements need to be signed, it may be necessary to sign with an ordinary signature pen first, and then scan the paper contract with the signature into an electronic document. pieces. However, the capacitive pen of the present invention can realize one-step completion, place the contract signature page on the touch screen displaying the corresponding page of the electronic contract, and the user can realize the above-mentioned purpose by signing once, which improves the efficiency.

The purpose, technical solutions and beneficial effects of the present invention have been further described in detail in conjunction with specific embodiments. It should be understood that, the specific implementation manners of the present invention are described above only for the purpose of illustration, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (11)

1. A capacitive pen communicating with a capacitive touch device, comprising: a hollow pen barrel; and The first refill, including the main part of the refill and the nib part, wherein, The main body part of the refill is accommodated inside the barrel, and the front end of the nib part is exposed to the outside of the barrel, and wherein, The main part of the refill contains materials that can be written on common writing media through the tip part; A control unit, which is housed inside the pen barrel, is used to control the capacitive pen to send signals to the capacitive touch device. 2. The capacitive pen according to claim 1, wherein the first refill is made of a conductive material, the main part of the refill is connected to the control unit, and the pen tip is connected to the capacitive touch pen. The device sends a signal. 3. The capacitive pen according to claim 2, wherein the pen shaft is made of non-conductive material. 4. The capacitive pen according to claim 2, wherein the barrel is made of a conductive material, and the nib portion is electrically insulated from the barrel. 5. The capacitive pen according to claim 1, wherein the first pen core is made of a non-conductive material, at least a part of the penholder close to the pen tip is made of a conductive material, and the penholder The at least a part of is connected with the control unit, and sends a signal to the capacitive touch device. 6. The capacitive pen according to any one of claims 1-5, wherein the material contained in the main body of the refill is ink or ink. 7. The capacitive pen according to claim 6, wherein the first refill is detachable. 8. The capacitive pen according to claim 6, further comprising: a second refill made of a conductive material; and a switching unit for switching the first refill and the second refill so that both One of them protrudes from the outside of the penholder, while the other retracts into the inside of the penholder. 9. The capacitive stylus according to claim 8, further comprising a pressure-sensitive measuring unit accommodated inside the pen holder for measuring the pressure of the pen tip on the capacitive touch device. 10. The capacitive stylus according to claim 8, further comprising a power supply unit located in the pen holder, for providing power to the control unit and the pressure-sensitive measurement unit. 11. The capacitive pen according to claim 8, further comprising at least one key unit arranged on the pen holder, the at least one key unit is connected with the control unit, and is configured to, when the capacitive pen When communicating with the capacitive touch device, specified functions are realized.