CN102411433A - Bifunctional handwriting board using image capturing equipment - Google Patents
Bifunctional handwriting board using image capturing equipment Download PDFInfo
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- CN102411433A CN102411433A CN201010289402XA CN201010289402A CN102411433A CN 102411433 A CN102411433 A CN 102411433A CN 201010289402X A CN201010289402X A CN 201010289402XA CN 201010289402 A CN201010289402 A CN 201010289402A CN 102411433 A CN102411433 A CN 102411433A
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Abstract
The invention discloses a bifunctional handwriting board using image capturing equipment. Infrared image sensing equipment is used as a stylus position coordinate detection part and arranged above a writing area capable of accommodating writing paper by a bracket. A signal processing circuit matched with the infrared image sensing equipment comprises an image identification unit for identifying infrared light spots, a system control unit, a coordinate computation unit, a data coding unit and a transmission unit. An ink core capable of leaving written ink marks on the paper is arranged in a stylus. A handwriting pressure sensing element is arranged in a penholder at the tail end of the ink core. The stylus comprises four basic structures, namely wired styluses capable of emitting and reflecting infrared rays and wireless styluses capable of emitting and reflecting the infrared rays. The handwriting board provided by the invention can realize electronic and ink mark bifunctional writing, has the advantages of simplicity, convenience, no limitations in the writing paper, low manufacturing and using cost and the like, and is suitable for online education and communication.
Description
Technical field
The present invention relates to a kind of hand input device that is used for computing machine, belong to IMAQ and processing technology field, especially IMAQ and recognition technology are in the application in computing machine picture and text input technology field.
Background technology
Along with the development of the Web-based instruction, realize that through the internet remote teaching is more and more universal, but existing input medium and product but are difficult to satisfy this demand.For literature, history, politics etc. is main subject with the word content, although some inconvenience when input is like note, special format letter symbol in some cases, keyboard can also meet the demands basically; But the content of science and engineering subjects such as input structure complex mathematical, physical equation and chemical molecular formula and figure, matrix, keyboard just is difficult to meet the demands.If use contents such as handwriting pad input formula, chemical formula; Owing to there is not the ink marks on the paper; So during contents such as input formula, chemical formula, matrix, the user usually is difficult to confirm that at handwriting pad where character late will write, and causes importing content confused.Therefore application such as the Web-based instruction needs a kind of electronic document that computing machine can be discerned demonstration that can stay, and can stay the difunctional handwriting pad of ink marks again on paper.
Existing writing technology mainly contains resistive film technology, electromagnetic induction technology, space supersonic is technological, and these technology have constituted some kinds of basic handwriting pad technical schemes.Use the handwriting pad product of these technique constructions; Though the advantage of self is respectively arranged; Like the low cost of resistive film, the high precision of electromagnetic induction and the characteristics that pressure sensitivity function, space supersonic do not need the hand-written base plate of entity etc.; But a common shortcoming is arranged all: be exactly not to be suitable for designing to stay the electronic document that computing machine can be discerned demonstration, can stay the difunctional handwriting pad of ink marks again on paper.
Like the resistive film technology; Write with common pencil, pen, ball pen, signature pen though can on the handwriting pad face, enclose paper, shortcoming is: first pair of paper thickness is strict, above common 80g copy paper is attached to; The dynamics of writing is light slightly; Ink marks has had, but following resistive film but can not get enough pressure because of the existence of paper, can not stay electronic document; The skin hardness of second resistive film and intensity are all very low, if write to such an extent that dynamics is big slightly, cause handwriting pad to damage with regard to being easy to scratched by sharp-pointed nib.
For the electromagnetic induction technology, first because writing pencil inside needs to install electronic components such as coil, so be difficult to have living space the pen core that has printing ink is installed, especially pack into the now general finished product refill for ball-point pen or the pen core of signature pen.Second the existence because of electromagnetic field, though the pen core of design special, also because the existence of eddy current can not have metallic conductor at the tip of pen core.The material of making nib has like this just received great restriction, is difficult to design long-life printing ink pen core.Even manufacture and design out at all costs, also non-general user afford to consume.
For the space supersonic technology; Though can realize the difunctional handwriting pad of electronic document and ink marks document; But because the tip of writing pencil is equipped with barrel-shaped ultrasonic transmitter, a body inside has a large amount of electronic components again, so the diameter of first nib, size all are restricted; Be difficult to pack into the now the most general finished product refill for ball-point pen or the pen core of signature pen equally, the half special-purpose pen core that the ink volume capacity of can only packing into is very little.Such pen core life-span is very short, and general after writing one or two page on the paper of A4 breadth, the printing ink of pen core will run out, so daily cost of use is very high with writing big density.The second, be subject to the emission angle of ultrasonic transmitter on the writing pencil, hyperacoustic writing pencil inclination angle to pen and paper when writing requires very strict; Require a body approaching perpendicular to paper; The general maximum inclination angle that only allows to have tens degree with the vertical line of paper, the inclination angle is big again, when the ultrasonic receiver distance is far away slightly; With regard to the problem that is easy to signal weakening occur, write broken string, therefore do not meet very much ordinary people's writing posture.
If enlarge the technology that can be used for handwriting input again, also has infrared touch panel with electronic whiteboard technology, camera touch-screen with electronic whiteboard is technological, surface acoustic wave touch screen is technological, capacitance touch screen is technological.This type technology is mainly used in the surface of flat-panel monitor and projection screen, and the character of its writing surface determines employed touch objects of these hand-writing techniques or writing pencil can't use black core, therefore is not suitable for directly applying to personal handwritten plate series products.
Summary of the invention
The object of the invention; It is exactly shortcoming to prior art; Disclose a kind of electronic document that computing machine can be discerned demonstration that stays, can stay the technical scheme of the difunctional handwriting pad of ink marks again on paper, to satisfy the needs of science and engineering related content input in the Web-based instruction, the interchange.
Difunctional handwriting pad of the present invention includes writing pencil, the writing pencil position coordinates detection part of writing pressure sensor, and with write the signal that pressure sensor and position coordinates detection part match and receive and treatment circuit.In the present invention; The coordinate detection unit spare that uses; It is the image sensing apparatus that to catch infrared image; Be installed in the top of writing the zone, include the image identification unit, coordinate Calculation unit, digital coding and the transmission unit that are used for infrared light spot identification that are linked in sequence in the signal processing circuit that is mated, and the system control unit that is used to coordinate said each cell operation; Employed writing pencil, inner packet contain one can stay the black core of writing ink marks on paper, said pressure sensor is installed in the penholder of the tail end of Mo Xin; Also include a writing plane, be used to hold the paper of writing down; And the infrared light sources that ability is launched or reflected by the writing end of writing pencil shell, and the infrared ray source driving circuit that is mated.
Employed black core among the present invention is the employed black core of signature pen or ball pen.
Writing pencil of the present invention has two kinds: wired pen and wireless pen.
For wired pen, be used to drive the luminous driving circuit of infrared light sources and be connected with writing pencil through lead or cable with said signal receiving processing circuit, and with infrared light sources and pressure sensor wired connection.
A kind of structure of wired, said infrared light sources is some infraluminescence pipes, is installed on the writing end of writing pencil shell.
The wired writing pencil that also has a kind of reflective structure on the surface of writing pencil writing end shell, is enclosed with the optical material of the directed retroreflecting of one deck; Wherein infrared light sources is some infraluminescence pipes, and the position at image sensing apparatus place is installed, and the infrared radiation of being launched is in writing the zone.Like this, through the reflection of directed retroreflecting, the infrared ray that infrared light sources is launched is directed in the camera lens that has reflexed to imageing sensor.
The writing pencil of reflective structure also can be made wireless.Identical with wired writing pencil, on the surface of writing pencil writing end shell, be enclosed with the optical material of the directed retroreflecting of one deck; Wherein infrared light sources is some infraluminescence pipes, and the position of image sensing apparatus is installed, and the infrared radiation of being launched is in writing the zone; In said signal receiving processing circuit, also include a wireless data receiving element; In writing pencil, including one is the wireless data transmission unit of power supply with the battery; Be installed in the pressure detecting element in the writing pencil, be connected with the data input pin of wireless data transmission unit, with the quantity of state of transmission pressure detecting element to described wireless data receiving element.In general this also can use radio-frequency module to unlimited transceiver module.If but on the optical channel of camera; The infrared filter of the arrowband that the ultrared wavelength of being launched of the infraluminescence pipe that includes and be used to track is complementary; So said wireless data transmission and receiving element can be the wireless transmit receiving elements that utilizes the infrared transmission data of other wavelength.
For above-mentioned wired or wireless pen; If wired or wireless data transmission channel can be used for the coded data of transmission pressure detecting element; So the pressure sensor in the writing pencil can use the electric signal of output to become the sensing element of certain funtcional relationship with detected pressure.
The structure of another kind of wireless writing pencil, infrared light sources is some infraluminescence pipes, is installed on the shell of writing end of writing pencil, said writing pencil inner packet contains a battery and the control circuit as power supply; Include the luminous driving circuit of the said luminotron of driving in the said control circuit, bring in the luminance of control luminotron through a control; Described pressure detecting element is connected in said control end and the writing pencil.Further, if the picture recognition module in the said signal receiving processing circuit can be discerned the brightness of luminotron in the writing pencil, and the control end of the luminance of control luminotron can be controlled the brightness of luminotron.Pressure detecting element in the so described writing pencil also can use the above-mentioned sensing element that funtcional relationship is arranged.
The benefit of invention: through description to technical scheme of the present invention; Can see handwriting pad of the present invention except can realizing that electronics and ink marks are difunctional and writing; Also have simple in structure, easy to use, to writing advantages such as unrestricted, the low manufacturing cost and use cost of paper, life-span are long, can fully satisfy the needs of internet exchange and teaching.
Description of drawings
Fig. 1: the synoptic diagram of general structure of the present invention;
Fig. 2: circuit system block diagram of the present invention;
Fig. 3: a kind of infraluminescence pipe is installed in the structure of writing pencil writing end;
Fig. 4: but the part-structure synoptic diagram of a kind of use of the present invention reflected infrared;
Fig. 5: but a kind of structural representation of writing pencil of reflected infrared;
Fig. 6: the part-structure synoptic diagram of wireless writing pencil.
Specific embodiment
Principle of the present invention and embodiment are described with reference to the accompanying drawings.
Provided basic structure form of the present invention among Fig. 1.From Fig. 1, can see; The present invention by base 101, the support of holding up 102 of the main circuit plate that is used to lay total system, be installed in IMAQ sensing equipment (generally use common CMOS camera, be referred to as camera below) 103 within the shell 104, be used to hold, place writing paper write zone 105, writing pencil 106 constitutes.In the nib of writing pencil part writing end 107 positions just, include an infrared components, can launch or the reflect near infrared light line.In the present invention, why use near infrared ray (wavelength is generally 780～980nm) has three reasons as the light of usefulness of tracking: the firstth, human eye is invisible, can not produce interference to the user; The secondth, camera is very sensitive to the light of this wavelength period again, and visible light is also easily by filtering; The 3rd is that light source obtains easily, is widely used like the infraluminescence pipe of 850nm and 940nm.Writing a zone end of 105, can also be provided with one and be used to fill in or clamp and write with paper, write opening or mechanism 109 with book, person easy to use is the position of paper fixedly.
In the present invention, writing end 107 positions of writing pencil can use the infraluminescence pipe to launch infrared ray as infrared light sources, also can use the especially directed retroreflecting element of reflecting element to come reflected infrared, indicate the position at writing pencil nib place.When camera 103 capture these launched or the infrared ray that is reflected after, infrared ray forms images on the CMOS of camera target surface.
Fig. 2 has provided the block diagram of camera image signal processing system of the present invention.From Fig. 2, can see; After image sensing apparatus 103 (being camera among Fig. 1) collects the infrared ray of emission of writing pencil writing end or reflection; Be sent in the signal processing system that constitutes by DSP or single-chip microcomputer and inner executable code; Under the coordination control of system control unit 201, image identification unit 202 relatively waits computing through data, and identification extraction goes out the infrared view signal of writing pencil writing end from background signal; And then known conditions through setting; Utilize the coordinate Calculation function in coordinate Calculation and the data integration unit 203, obtain the positional information of writing pencil writing end in writing zone 105, i.e. coordinate figure in the coordinate system XOY that sets.If necessary; Can also be again according to the position deviation of infrared emission or reflecting element and nib and infrared components on the writing end 107 of writing pencil and user's general writing style; Coordinate figure is revised, obtained nib more accurate position in writing zone 105.After obtaining needed coordinate information; Utilize the data integration and the encoding function of coordinate Calculation and data integration unit 203 again; Coordinate data and other data are integrated, calculated like the pressure data of importing from the inner input port of writing pressure detecting element 205 of writing pencil; Finally,, output to and use in the computer system of the present invention through input-output unit 204 according to the communication protocol of setting.Various piece shown in Figure 2 except IMAQ loses 103, all can be installed among the base 101 of handwriting pad.
Given in Fig. 2 is function and a kind of structure and the order of various piece, module, unit, is not unique structure and order.Because the globality of microprocessor system and controllability; So function that the overwhelming majority realizes through code; Can design according to the ad hoc structure of micro controller system and the actual needs of product; Each function permutation and combination among different unit, also can be fitted together complex function unit of formation with image identification unit like system control unit.In addition; Used hereinly be used for the infrared light sources 206 that the writing pencil writing end tracks; Need according to writing pencil be wired pen or wireless pen, infrared ray is launched or be reflected, set independently be installed in hand-written in not still be through lead be mounted in the writing pencil or camera near, provided the connection of dotted line in therefore scheming; Only represent that this unit is that system is necessary, rather than being connected on electric must be arranged with other part shown in Figure 2.For the pressure detection input port, dotted line connects and had both represented with infrared light supply identical implication is arranged, and also has the implication of wireless connections simultaneously.
To system architecture shown in Figure 2, main input picture collection and Treatment Technology field have been mature technologies, and use can directly used or use for reference to plurality of applications in the technical scheme of other field.Even for being directed against technical scheme of the present invention, what the front background technology was given just can directly apply to the present invention about " infrared touch panel and electronic whiteboard technology, camera touch-screen and electronic whiteboard technology " employed basic technical scheme.There have been a lot of patent documentations to put down in writing this type technical scheme at present; Like number is Chinese patent or the disclosed technical schemes of patented claim such as 200610122739.5,200610122463.0,200410054381.8,00128801.6,200580038703.2, with and inner related technical scheme more early.
In the present invention, for the signal capture processing section,, all be existing mature technology, so no longer specify although very many different concrete structures can be arranged.Embodiment of the present invention mainly concentrates on the form and the structure aspects of writing pencil, and the concrete structure that therefore will combine writing pencil, infrared light supply below emphatically and write the pressure sensing part is explained various embodiments of the present invention.
Writing pencil used in the present invention can be by these four kinds of feature structures of wired pen, wireless pen, emission infrared ray and reflected infrared; Be combined into four kinds of different writing pencils; That is: the writing pencil of wired emission infrared ray, wired reflected infrared, wireless transmit infrared ray, these four kinds of structures of wireless reflected infrared constitutes various embodiment.Explain respectively below.
Embodiment 1: the ultrared wired writing pencil of a kind of emission
Fig. 3 is a kind of wired and structure of initiatively launching ultrared writing pencil.Can see that from figure at the writing end 107 of writing pencil some infraluminescence pipes 304 are installed, the outside is equipped with can pass through ultrared light inlet window 303.The shell that light inlet window is installed in writing pencil through modes such as screw thread or clampings is an end of penholder 301 just, the pen core 302 of a general signature pen, and when light inlet window separated with penholder, the opening through the penholder writing end was installed in the penholder.The nib sleeve is passed in the inner step of this end of penholder and the inside of light inlet window like this, defines the position of penholder jointly.Suitably design the gap between this secondary position limiting structure; Pen core can only be moved in a little scope; Can guarantee that pen core suffered pressure when writing is delivered on the pressure detecting element 307 that is installed in the penholder other end; Writing pressure when excessive again, the inner limited step of penholder can be undertaken fully and write pressure and be unlikely to damage pressure detecting element.
Embodiment 2: a kind of wired writing pencil of reflected infrared
Fig. 4 provides is to utilize the mode of reflected infrared to detect the structural representation of writing pencil position coordinates.In this structure, some infraluminescence pipes 401 are installed near camera lens of camera 103 or on every side.The reflecting element that the light 402 that the infraluminescence pipe is launched is installed in writing pencil writing end 107 reflects, and is captured by camera.
This structure both can be used for wireless pen, also can be used for wired pen.When being used for wired, the basic structure of writing pencil is as shown in Figure 5.Parcel or cover last layer reflectorized material 501 on the nib of writing pencil, the directed retroreflecting material that preferably can light be reflected back according to the former direction of incident path, like materials such as retroreflecting fabric, retroreflecting films, even retroreflecting coating.The penholder structure of the writing pencil of this structure can design with reference to Fig. 3, but has omitted lead and the dependency structure that is communicated with writing end, but can keep the structure that has moved position-limiting action to pen core, with pen core from the writing end penholder 301 of packing into.Because the pressure of writing generally speaking can be very not big, so Fig. 5 provided a kind of structure of simplification, from the tail end pen core of packing into, simplified the design of penholder, and body has omited the mounting structure of nib part.Can certainly in tail-hood 306, design other position limiting structure, realize sharing the excessive purpose of writing pressure.Here, pressure detecting element 306 is electrically connected with the lead that is connected camera image signal place system through lead equally.
Embodiment 3: the ultrared wireless writing pencil of another kind of emission
For wireless pen, the structure of Fig. 1, Fig. 4 all can be used.When using the structure of Fig. 1; The structure of part such as the installation of the penholder of wireless writing pencil, the structure of nib, pen core can be identical with the appropriate section among Fig. 3; The structure of rear end is as shown in Figure 6, and the tail end of penholder is used to hold as the battery 601 of power supply and the sleeve 603 of circuit board 602 and is connected with one.Be connected with control circuit on being installed in circuit board 602 as the infraluminescence pipe of light source; The driving circuit that includes the driven for emitting lights pipe in this control circuit includes the luminance that the control luminotron is brought in a control; Described pressure detecting element 307 is connected in this control end and the writing pencil.Pressure detecting element 307 detects and writes after the pressure like this, after the infrared ray that luminotron is launched of writing end is captured by camera, can obtain the position at writing pencil nib place.
Embodiment 4: the wireless writing pencil of another kind of reflected infrared
When using structure shown in Figure 4, the structure of part such as the installation of the penholder of wireless writing pencil, the structure of nib, pen core can be identical with the appropriate section among Fig. 5, and structure as shown in Figure 6 still can be used in the rear end.At this moment, in the signal receiving processing circuit of camera, can wireless data receiving element of design and installation; On the circuit board 602 in writing pencil, wireless data transmission unit of relative set, pressure detecting element is connected with the data input pin of data transmission unit.The quantity of state that this radio path can the transmission pressure detecting element like this is to aforesaid receiving element.This radio path can use radio-frequency communication module.If on the optical channel of camera; The infrared filter of the arrowband that the ultrared wavelength of being launched of the infraluminescence pipe that includes and be used to track is complementary, this radio channel also can use the infrared module that the most advanced and sophisticated infraluminescence tube wave length of wavelength and writing pencil differs greatly so.As track and use the 850nm infrared light supply, wireless module is with the infrared light supply of 940nm.
In the present invention; If the data that wireless communication module can transfer encoding; So no matter to be wired writing pencil, also to be to use the wireless pen of wireless module communication, the pressure detecting element in the writing pencil; All can use the electric signal of output to become the sensing element of certain funtcional relationship with detected pressure, be disclosed pressure transducer in 201010101907.9 one Chinese patent application like number.If the picture recognition module in the signal receiving processing circuit of camera can be discerned the brightness of luminotron in the writing pencil; The control end of controlling the luminance of luminotron simultaneously also can be controlled the brightness of luminotron; The wireless writing pencil that combines the structure of Fig. 3 and Fig. 6 so and constitute, pressure detecting element wherein also can use the sensing element that funtcional relationship is arranged like this.Like this, just can include the information of writing pencil writing physical strength in the data that the signal receiving processing circuit of camera is exported, be used for the actual impression of writing of more vivid simulation.
The foregoing description has provided several kinds of organization plans that the present invention can implement, but embodiment of the present invention can with embodiment be not confined to above-mentioned concrete structure.For example the signal processing circuit of camera and components of system as directed just can have the very multiple software and hardware structure that can realize functions such as image recognition, coordinate Calculation; The concrete structure of writing pencil also can have infinitely multiple; Be included in pen and go up additional functions such as increasing other function keys, therefore, on the basis of basic structure scheme of the present invention; To technical schemes such as improvement of the present invention, replacement, omission, transplanting, all belong within protection scope of the present invention.
Claims (10)
1. difunctional handwriting pad that uses image-capturing apparatus; Include writing pencil, the writing pencil position coordinates detection part of writing pressure sensor; And receive and treatment circuit with writing the signal that pressure sensor and position coordinates detection part match, it is characterized in that:
Employed coordinate detection unit spare; It is the image sensing apparatus that to catch infrared image; Be installed in the top of writing the zone; Include image identification unit, coordinate Calculation and the data integration unit, the input-output unit that are used for infrared light spot identification that are linked in sequence in the signal processing circuit that is mated, and the system control unit that is used to coordinate said each cell operation;
Said writing pencil, inner packet contain one can stay the black core of writing ink marks on paper, said pressure sensor is installed in the penholder of the tail end of Mo Xin;
Also include a writing plane, be used to hold the paper of writing down;
An ability is by the infrared light sources of emission of the writing end of writing pencil shell or reflection, and the infrared ray source driving circuit that is mated.
2. difunctional handwriting pad according to claim 1 is characterized in that: described black core is the employed black core of signature pen or ball pen.
3. difunctional handwriting pad according to claim 1 is characterized in that: be connected through lead between said writing pencil and the said signal receiving processing circuit, and be connected with pressure sensor with said infrared light sources through lead.
4. difunctional handwriting pad according to claim 3 is characterized in that: said infrared light sources is some infraluminescence pipes, is installed on the writing end of writing pencil penholder.
5. difunctional handwriting pad according to claim 3 is characterized in that: on the surface of said writing pencil writing end penholder, be enclosed with the optical material of the directed retroreflecting of one deck; Said infrared light sources is some infraluminescence pipes, and the position at said image sensing apparatus place is installed, and the infrared radiation of being launched is write in the zone described.
6. difunctional handwriting pad according to claim 1 is characterized in that: on the surface of said writing pencil writing end penholder, be enclosed with the optical material of the directed retroreflecting of one deck; Said infrared light sources is some infraluminescence pipes, the position that said image sensing apparatus is installed, and the infrared radiation of being launched is write in the zone described; In said signal receiving processing circuit, also include the wireless data receiving element of the electric signal that is used for receiving the writing pencil pressure sensor; Corresponding therewith in said writing pencil, including one is the wireless data transmission unit of power supply with the battery; The said pressure detecting element that is installed in the said writing pencil is connected with the data input pin of said wireless data transmission unit.
7. difunctional handwriting pad according to claim 6 is characterized in that: on the optical channel of said image sensing apparatus, the infrared filter of the arrowband that the ultrared wavelength of being launched with said infrared light supply is complementary is installed; Said wireless data transmission and receiving element are the wireless transmit receiving elements that utilizes the infrared transmission data of other wavelength.
8. difunctional handwriting pad according to claim 1; It is characterized in that: said infrared light sources is some infraluminescence pipes; Be installed on the penholder of writing end of said writing pencil, said writing pencil inner packet contains a battery and the control circuit as power supply; Include the luminous driving circuit of the said luminotron of driving in the said control circuit, bring in the luminance of control luminotron through a control; Described pressure detecting element is connected in said control end and the writing pencil.
9. difunctional handwriting pad according to claim 8; It is characterized in that: the picture recognition module in the said signal receiving processing circuit can be discerned the brightness of luminotron in the writing pencil, and the control end of the luminance of control luminotron can be controlled the luminosity of said luminotron.
10. according to the described difunctional handwriting pad of any claim among the claim 1-9, it is characterized in that: the pressure sensor in the said writing pencil is that the electric signal of output becomes the sensing element of certain funtcional relationship with detected pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010289402XA CN102411433A (en) | 2010-09-21 | 2010-09-21 | Bifunctional handwriting board using image capturing equipment |
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|---|---|---|---|
| CN201010289402XA CN102411433A (en) | 2010-09-21 | 2010-09-21 | Bifunctional handwriting board using image capturing equipment |
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| CN102411433A true CN102411433A (en) | 2012-04-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103838444A (en) * | 2012-11-27 | 2014-06-04 | 联想(北京)有限公司 | Input method and input equipment |
| CN104303138A (en) * | 2013-03-08 | 2015-01-21 | 日东电工株式会社 | Information management system |
| US9213442B2 (en) | 2013-03-08 | 2015-12-15 | Nitto Denko Corporation | Electronic underlay with wireless transmission function |
| US9239641B2 (en) | 2013-03-08 | 2016-01-19 | Nitto Denko Corporation | Electronic underlay |
| US9811211B2 (en) | 2013-03-06 | 2017-11-07 | Nitto Denko Corporation | Position sensor |
| CN107757189A (en) * | 2017-11-14 | 2018-03-06 | 黄彩霞 | A kind of smart pen |
| WO2019090530A1 (en) * | 2017-11-08 | 2019-05-16 | 深圳市柔宇科技有限公司 | Handwriting board, handwriting device and handwriting method |
| CN111464770A (en) * | 2020-04-07 | 2020-07-28 | 北京爱国小男孩科技有限公司 | Intelligent pen and painting and calligraphy Internet of things sharing system based on intelligent pen |
| CN112543906A (en) * | 2018-06-07 | 2021-03-23 | 深圳市柔宇科技股份有限公司 | Handwriting pen, handwriting input device and page positioning method |
| CN112947779A (en) * | 2021-04-19 | 2021-06-11 | 广州宏途教育网络科技有限公司 | Writing start system based on operation of intelligent pen |
-
2010
- 2010-09-21 CN CN201010289402XA patent/CN102411433A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103838444A (en) * | 2012-11-27 | 2014-06-04 | 联想(北京)有限公司 | Input method and input equipment |
| CN103838444B (en) * | 2012-11-27 | 2016-12-21 | 联想(北京)有限公司 | A kind of input method and input equipment |
| US9811211B2 (en) | 2013-03-06 | 2017-11-07 | Nitto Denko Corporation | Position sensor |
| US9239641B2 (en) | 2013-03-08 | 2016-01-19 | Nitto Denko Corporation | Electronic underlay |
| CN104303138B (en) * | 2013-03-08 | 2016-01-27 | 日东电工株式会社 | Information management system |
| US9250724B2 (en) | 2013-03-08 | 2016-02-02 | Nitto Denko Corporation | Information management system |
| US9213442B2 (en) | 2013-03-08 | 2015-12-15 | Nitto Denko Corporation | Electronic underlay with wireless transmission function |
| CN104303138A (en) * | 2013-03-08 | 2015-01-21 | 日东电工株式会社 | Information management system |
| WO2019090530A1 (en) * | 2017-11-08 | 2019-05-16 | 深圳市柔宇科技有限公司 | Handwriting board, handwriting device and handwriting method |
| CN107757189A (en) * | 2017-11-14 | 2018-03-06 | 黄彩霞 | A kind of smart pen |
| CN112543906A (en) * | 2018-06-07 | 2021-03-23 | 深圳市柔宇科技股份有限公司 | Handwriting pen, handwriting input device and page positioning method |
| CN111464770A (en) * | 2020-04-07 | 2020-07-28 | 北京爱国小男孩科技有限公司 | Intelligent pen and painting and calligraphy Internet of things sharing system based on intelligent pen |
| CN111464770B (en) * | 2020-04-07 | 2022-11-08 | 日照爱国小男孩物联网科技有限公司 | Intelligent pen and painting and calligraphy Internet of things sharing system based on intelligent pen |
| CN112947779A (en) * | 2021-04-19 | 2021-06-11 | 广州宏途教育网络科技有限公司 | Writing start system based on operation of intelligent pen |
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Application publication date: 20120411 |