CN102479020B - Anti-interference electromagnetic handwriting device and electromagnetic pen position identification method - Google Patents
Anti-interference electromagnetic handwriting device and electromagnetic pen position identification method Download PDFInfo
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Abstract
The invention discloses an anti-interference electromagnetic handwriting device and an electromagnetic pen position identification method. An electromagnetic signal from an electromagnetic pen is received through an antenna board and is sent to a control panel; and the control panel is used for controlling the working status of a display panel according to the received electromagnetic signal, and judging whether to identify the position of the electromagnetic pen according to working status information of the display panel. With the adoption of the scheme in the invention, the influence of a noise interference signal on the electromagnetic pen can be effectively avoided when the display panel is refreshed, so as to prevent error action of the electromagnetic pen.
Description
Technical field
The present invention relates to electric digital processing field, particularly, in thering is the electromagnetic handwriting equipment of display panel, prevent from refreshing because of display panel a kind of jamproof electromagnetic handwriting device and the time writer location recognition method that causes misoperation.
Background technology
In existing electromagnetic handwriting device, while utilizing the time writer with resonant circuit to move in antenna plate, the resonant circuit of the excitation of electromagnetic wave time writer sending from the transmission coil of antenna plate, thus by time writer, induce strong resonance signal.When receiving coil senses time writer signal, it is processed and samples and can determine the position of time writer.But above display panel being arranged on to antenna plate and while forming the equipment such as hand-written demonstration, display panel duty is divided into two kinds: state and the page turning of normal display page content or the Flushing status while refreshing.When display panel is during in Flushing status, screen interference noise when receiving coil also can receive display panel when receiving time writer input signal and refreshes, above noise signal is received after coil reception, thereby may be considered to the input signal generation false triggering action of time writer.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of jamproof electromagnetic handwriting device and time writer location recognition method, to prevent that time writer from producing misoperation because of noise signal.
For achieving the above object, technical scheme of the present invention is achieved in that
Jamproof electromagnetic handwriting device provided by the invention comprises: display panel, be arranged on described display panel below antenna plate, be arranged on control panel and the inner time writer with electromagnetic resonant circuit of the below of described antenna plate, described control panel, for the electromagnetic signal sending according to antenna plate, control the duty of display panel, and according to the work state information of described display panel, judge whether time writer position to identify.
In such scheme, described control panel judges whether time writer position to be identified as according to the work state information of display panel: at described display panel during in Flushing status, the electromagnetic signal that control panel stops receiving is processed, thereby stops time writer position to identify; At described display panel, finish after Flushing status, control panel is processed the electromagnetic signal receiving, thus the position of identification time writer.
In such scheme, described control panel comprises: sending part, receiving portion, handling part and control part; Wherein,
Sending part, for sending electromagnetic signal to described antenna plate;
Acceptance division, generates input signal for the electromagnetic signal that antenna plate is received, and sends to handling part;
Handling part, for described input signal is processed, generates identifying information and sends to control part;
Control part, for according to the position of described identifying information identification time writer, and during in Flushing status, makes handling part stop the processing to input signal at described display panel; At described display panel, finish after Flushing status, make handling part continue input signal to process.
In such scheme, described sending part comprises: signal generator and the first multidiameter option switch; Wherein,
Signal generator, for generation of the electromagnetic signal of specified waveform;
The first multidiameter option switch, for selecting to connect the transmission coil of described antenna plate, and sends the electromagnetic signal producing by described transmission coil.
In such scheme, described acceptance division comprises: the second multidiameter option switch and enlarging section; Wherein,
The second multidiameter option switch, for selecting to connect the receiving coil of described antenna plate, and exports to enlarging section by described receiving coil by the electromagnetic signal receiving;
Enlarging section, for received electromagnetic signal is amplified, generates described input signal and sends to handling part.
In such scheme, described handling part comprises: shaping circuit, integrating circuit, A/D sample circuit; Wherein,
Shaping circuit, carries out filter shape processing for the input signal to from described acceptance division;
Integrating circuit, carries out integration for the input signal to after filter shape is processed, and generates integrated waveform;
A/D sample circuit, for described integrated waveform is sampled, is that identifying information sends to control part by the coordinate transformation corresponding to peak value place of sampling gained.
The present invention also provides a kind of jamproof time writer location recognition method, and the method comprises:
Antenna plate receives the electromagnetic signal from time writer, and described electromagnetic signal is sent to control panel; Control panel is controlled the duty of display panel according to received electromagnetic signal, and judges whether time writer position to identify according to the work state information of described display panel.
In such scheme, described control panel judges whether time writer position to be identified as according to the work state information of display panel: at described display panel during in Flushing status, the electromagnetic signal that control panel stops receiving is processed, thereby stops time writer position to identify; At described display panel, finish after Flushing status, control panel is processed the electromagnetic signal receiving, thus the position of identification time writer.
In such scheme, what described control panel stopped the electromagnetic signal of reception to carry out is treated to: stop electromagnetic signal carrying out filter shape processing and/or stop the signal after filter shape is processed carry out integration and/or stop described integrated waveform to sample.
In such scheme, the method also comprises: described control panel, according to corresponding zone bit, judges that whether described display panel is in Flushing status; Described control panel refreshes spent clock according to display panel, judges whether the Flushing status of display panel finishes.
In jamproof electromagnetic handwriting device provided by the present invention and time writer location recognition method, antenna plate receives the electromagnetic signal from time writer, and described electromagnetic signal is sent to control panel; Control panel is controlled the duty of display panel according to received electromagnetic signal, and at display panel during in Flushing status, the electromagnetic signal that control panel stops receiving is processed, thereby stops time writer position to identify; At described display panel, finish after Flushing status, control panel is processed the electromagnetic signal receiving, thus the position of identification time writer.Adopt scheme of the present invention, the impact of the noise interferences in the time of can effectively avoiding display panel to refresh on time writer, prevents the misoperation of time writer.
Accompanying drawing explanation
Fig. 1 is the formation schematic diagram of the jamproof electromagnetic handwriting device of the present invention;
Fig. 2 is the formation block diagram of control panel in the jamproof electromagnetic handwriting device of the present invention;
Fig. 3 is the jamproof time writer location recognition method of the present invention process flow diagram.
Embodiment
Basic thought of the present invention is: antenna plate receives the electromagnetic signal from time writer, and described electromagnetic signal is sent to control panel; Control panel is controlled the duty of display panel according to received electromagnetic signal, and judges whether time writer position to identify according to the work state information of described display panel.
Below in conjunction with the drawings and specific embodiments, describe scheme of the present invention in detail.
As shown in Figure 1, this device comprises the structure of electromagnetic handwriting device provided by the invention: display panel 10, the stacked antenna plate 20 of display panel 10 belows, stacked control panel 30 and the time writer 40 that is arranged on antenna plate 20 belows of being arranged on; Wherein, on control panel 30, be equipped with the each several part circuit that forms electromagnetic handwriting device.The inside of time writer 40 has resonant circuit (not shown), and when time writer 40 carries out input operation near antenna plate 20, described resonant circuit can the mode by resonance generate stronger time writer signal by the electromagnetic wave receiving.
As shown in Figure 1, antenna plate 20 has vertically disposed a plurality of transmission coils 201 and a plurality of receiving coil 202 mutually.When time writer 40 carries out input operation near antenna plate 20, by the electromagnetic wave that sends coil 201 transmissions, by the resonant circuit in time writer 40 (not shown), received, resonant circuit generation resonance also produces stronger time writer signal, this time writer signal can be received by a plurality of receiving coils 202, therefore, by a plurality of receiving coils 202 being scanned to, obtain the coordinate that the electromagnetic intensity receiving is maximum receiving coil 202, be the input position of time writer 40.
Fig. 2 is the formation block diagram of control panel 30 in electromagnetic handwriting device.The control panel 30 of electromagnetic handwriting device as shown in Figure 2 comprises: sending part 301, acceptance division 302, handling part 303 and the control part 304 that the demonstration of each part mentioned above and display panel 10 is controlled.
Sending part 301 has signal generator 3011 and multidiameter option switch 3013.Signal generator 3011, under the control of control part 304, generates the electromagnetic signal of specified waveform, and the electromagnetic signal for generating can offer multidiameter option switch 3013 after amplifier 3012 is enlarged into prescribed strength; Multidiameter option switch 3013 is controlled to switch by control part 304 and is selected to connect any one transmission in coil 201, thereby can scan the transmission coil 201 of connecting, and the transmission coil of connecting by this selection sends the electromagnetic signal generating.
Handling part 303 comprises shaping circuit 3031, integrating circuit 3032 and A/D sample circuit 3033.Wherein, shaping circuit 3031, carries out filter shape processing to the input signal from acceptance division 302; Integrating circuit 3032, carries out integration to the signal after being processed by shaping circuit 3031, generates integrated waveform; A/D sample circuit 3033, samples to the integrated waveform being obtained by integrating circuit 3032, and is that identifying information inputs to control part 304 by the coordinate transformation corresponding to peak value of sampling gained.Because coordinate information corresponding to the peak value of the gained of sampling in A/D sample circuit 3033 is with the most corresponding close to the receiving coil 202 position of time writer, thereby control part 304 can identify time writer 40 position exactly according to the identifying information generating after sampling.
In addition, control part 304 is also controlled the demonstration of display panel 10, as display menu, text, picture etc., thereby the duty of display panel 10 is divided into two kinds, wherein, state is: a state for normal display page content, another kind of state is: from the Flushing status of switching and text/picture page turning between display menu, text or picture.Under Flushing status, display panel 10 also can generate electromagnetic waves, and because display panel 10 is very approaching apart from antenna plate 20, thereby the receiving coil in antenna plate 20 202 also can receive display panel 10 and refresh produced electromagnetic wave, referred to here as noise electromagnetic wave.
The noise electromagnetic wave that display panel 10 produces is present on whole surface, and substep is inhomogeneous, and receiving coil 202 not only can receive time writer signal, equally also can receive this noise electromagnetic wave.When this noise electromagnetic wave being processed in handling part 303, by 3033 pairs of these noise electromagnetic waves of A/D sample circuit, sampled, thereby think it is the electromagnetic signal producing because of time writer 40 by mistake, cause the misoperation of electromagnetic handwriting device.
In the present invention, at display panel 10 during in Flushing status, by control part 304, make handling part 303 stop the processing to input signal, the interference that the noise electromagnetic wave producing in the time of can avoiding display panel 10 to refresh produces time writer 40 location recognition, eliminates the misoperation causing because of noise electromagnetic wave.
Based on above-mentioned electromagnetic handwriting device, the present invention also provides a kind of jamproof time writer location recognition method, and as shown in Figure 3, the method comprises the following steps treatment scheme:
Step 401: control panel judges that whether display panel is in Flushing status; If display panel, in Flushing status, performs step 402; Otherwise, perform step 404;
In this step, control panel can obtain the electromagnetic signal that user inputs by time writer 40 from antenna plate 202, and identify time writer 40 position, also can be by being arranged on interface (not shown) on control part 304 etc., the instruction receiving from external unit (not shown) by antenna plate 202.
When user sends page turning or similar operations instruction by time writer 40, control part 304 is controlled display panel 10 according to the operational order receiving and is carried out refresh operation, so that the picture refreshing showing is new menu, nextpage text or lower width picture etc., now, at display panel during in Flushing status, control part 304 can generate corresponding zone bit, and thus, control part 304 can judge that whether display panel 10 is in Flushing status according to this zone bit; When display panel is during in Flushing status, perform step 402; Otherwise, perform step 403.
Step 402: control panel stops time writer position to identify;
In this step, control part 304 judgement display panels 10, when Flushing status, send instruction to handling part 303, make handling part 303 stop input signal processing.In the present embodiment, the A/D sample circuit 3033 that control part 304 is controlled in handling part 303 stops input signal sampling, make control part 304 stop time writer position to identify, now, even if the received coil 202 of the noise electromagnetic wave producing when display panel 10 refreshes receives, also can not be considered to the input signal of time writer 40, can avoid the misoperation of electromagnetic handwriting device 1.
Step 403: whether the Flushing status that judges display panel finishes, if refresh end, performs step 404; Otherwise, return to step 402;
In this step, control part 304 judges that whether the Flushing status of display panel 10 finishes, if display panel Flushing status finishes, performs step 404; If display panel Flushing status does not finish, return to step 402.In the present embodiment, control part 304 can refresh spent clock according to display panel, judges whether Flushing status finishes, wherein, display panel 10 refresh the more new model that spent clock depends on that display panel adopts.
Step 404: control panel is identified the position of time writer according to the electromagnetic signal receiving, and returns to step 401.
In this step, identifying information is processed and generated to 303 pairs of input signals of handling part, and control part 304 continues identification time writer 40 position according to the identifying information generating, and returns to step 401; In the present embodiment, handling part is treated to input signal: the 3033 pairs of input signals of A/D sample circuit in handling part are sampled.
In the present embodiment, at display panel 10 during in Flushing status, control part 304 is by closing the A/D sample circuit 3033 in handling part 303, make handling part 303 stop sampling, thereby make control part 304 stop identifying the position of time writer, the interference that the noise electromagnetic wave producing in the time of can avoiding display panel 10 to refresh produces time writer 40 location recognition, eliminates the misoperation causing because of noise electromagnetic wave.
In addition, control part 304 can also be by closing any one or more circuit in rectification circuit in handling part 303, integrating circuit and A/D sample circuit, to reach effect same as the previously described embodiments.When a plurality of or whole circuit that make handling part 303 are closed, can also further reduce the power consumption of electromagnetic handwriting device, be conducive to the mobile application of this device.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a jamproof electromagnetic handwriting device, comprising: display panel, be arranged on described display panel below antenna plate, be arranged on control panel and the inner time writer with electromagnetic resonant circuit of the below of described antenna plate, it is characterized in that,
Described control panel, controls the duty of display panel, and according to the work state information of described display panel, judges whether time writer position to identify for the electromagnetic signal sending according to antenna plate; Described control panel judges whether time writer position to be identified as according to the work state information of display panel: at described display panel during in Flushing status, the electromagnetic signal that control panel stops receiving is processed, thereby stops time writer position to identify; At described display panel, finish after Flushing status, control panel is processed the electromagnetic signal receiving, thus the position of identification time writer.
2. electromagnetic handwriting device according to claim 1, is characterized in that, described control panel comprises: sending part, receiving portion, handling part and control part; Wherein,
Sending part, for sending electromagnetic signal to described antenna plate;
Acceptance division, generates input signal for the electromagnetic signal that antenna plate is received, and sends to handling part;
Handling part, for described input signal is processed, generates identifying information and sends to control part;
Control part, for according to the position of described identifying information identification time writer, and during in Flushing status, makes handling part stop the processing to input signal at described display panel; At described display panel, finish after Flushing status, make handling part continue input signal to process.
3. electromagnetic handwriting device according to claim 2, is characterized in that, described sending part comprises: signal generator and the first multidiameter option switch; Wherein,
Signal generator, for generation of the electromagnetic signal of specified waveform;
The first multidiameter option switch, for selecting to connect the transmission coil of described antenna plate, and sends the electromagnetic signal producing by described transmission coil.
4. electromagnetic handwriting device according to claim 2, is characterized in that, described acceptance division comprises: the second multidiameter option switch and enlarging section; Wherein,
The second multidiameter option switch, for selecting to connect the receiving coil of described antenna plate, and exports to enlarging section by described receiving coil by the electromagnetic signal receiving;
Enlarging section, for received electromagnetic signal is amplified, generates described input signal and sends to handling part.
5. electromagnetic handwriting device according to claim 2, is characterized in that, described handling part comprises: shaping circuit, integrating circuit, A/D sample circuit; Wherein,
Shaping circuit, carries out filter shape processing for the input signal to from described acceptance division;
Integrating circuit, carries out integration for the input signal to after filter shape is processed, and generates integrated waveform;
A/D sample circuit, for described integrated waveform is sampled, is that identifying information sends to control part by the coordinate transformation corresponding to peak value of sampling gained.
6. a jamproof time writer location recognition method, is characterized in that, the method comprises:
Antenna plate receives the electromagnetic signal from time writer, and described electromagnetic signal is sent to control panel; Control panel is controlled the duty of display panel according to received electromagnetic signal, and judges whether time writer position to identify according to the work state information of described display panel;
At described display panel, during in Flushing status, the electromagnetic signal that control panel stops receiving is processed, thereby stops time writer position to identify; At described display panel, finish after Flushing status, control panel is processed the electromagnetic signal receiving, thus the position of identification time writer.
7. method according to claim 6, it is characterized in that, the electromagnetic signal that described control panel stops receiving is treated to: stop electromagnetic signal carrying out filter shape processing and/or stop the signal after filter shape is processed carry out integration and/or stop described integrated waveform to sample.
8. method according to claim 6, is characterized in that, the method also comprises: described control panel, according to corresponding zone bit, judges that whether described display panel is in Flushing status; Described control panel refreshes spent clock according to display panel, judges whether the Flushing status of display panel finishes.
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| JP6082172B1 (en) | 2015-04-09 | 2017-02-15 | 株式会社ワコム | Method, system, sensor controller, and active stylus using active stylus and sensor controller |
| CN105677107B (en) * | 2016-01-11 | 2018-07-17 | 福州瑞芯微电子股份有限公司 | The optimization method and system of the hand-written followability of screen |
| CN106484298B (en) * | 2016-10-10 | 2020-01-03 | 广东小天才科技有限公司 | Display method and device for handwriting input and intelligent equipment |
| CN107621895B (en) * | 2017-10-31 | 2024-04-09 | 深圳市精源宇科技有限公司 | Electromagnetic input device |
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| CN101501618A (en) * | 2006-06-09 | 2009-08-05 | 苹果公司 | Touch screen liquid crystal display |
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Effective date of registration: 20161118 Address after: 100193 Beijing, Haidian District, northeast Wang West Road, building 3, floor 363, room 5, room 8 Patentee after: BEIJING HANVON PENGTAI TECHNOLOGY CO., LTD. Address before: 100193 Beijing, northeast Wang West Road, building 8, intellectual property department, building No. 5, Haidian District Patentee before: Hanwang Tech Co., Ltd. |
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Address after: 100193 363, 3 floor, 5 building, 8 Northeast Road, Haidian District, Beijing. Patentee after: Beijing Hanvon Peng Thai Polytron Technologies Inc Address before: 100193 363, 3 floor, 5 building, 8 Northeast Road, Haidian District, Beijing. Patentee before: BEIJING HANVON PENGTAI TECHNOLOGY CO., LTD. |