CN102262312A - Liquid crystal display equipment having electromagnetic induction function and control method thereof - Google Patents
Liquid crystal display equipment having electromagnetic induction function and control method thereof Download PDFInfo
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- CN102262312A CN102262312A CN2010101922499A CN201010192249A CN102262312A CN 102262312 A CN102262312 A CN 102262312A CN 2010101922499 A CN2010101922499 A CN 2010101922499A CN 201010192249 A CN201010192249 A CN 201010192249A CN 102262312 A CN102262312 A CN 102262312A
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Abstract
The invention discloses liquid crystal display equipment having an electromagnetic induction function and a control method thereof. The liquid crystal display equipment comprises an electromagnetic induction module, a first wireless communication module and a second wireless communication module, wherein the electromagnetic induction module comprises an electromagnetic induction control unit and an electromagnetic induction antenna unit; the electromagnetic induction module is used for detecting and calculating information of an electromagnetic pen, converting the information into a digital signal and sending the digital signal; the first wireless communication module is connected with the electromagnetic induction module and used for sending the received information of the electromagnetic pen; and the second wireless communication module is connected with a computer and used for sending the information of the electromagnetic pen received by the first wireless communication module to the computer. According to the liquid crystal display equipment and the control method disclosed by the invention, the structure of the liquid crystal display equipment can be simplified; the mobility of products can be improved; and the energy consumption of the products can be reduced.
Description
Technical field
The present invention relates to computer realm, particularly a kind of liquid crystal display that possesses function of electromagnetic induction reaches the control method to it.
Background technology
LCD (Liquid Crystal Display, LCD) have that electromagnetic radiation is low, low in energy consumption, thermal value is few and characteristics such as frivolous, (Cathode Ray Tube, CRT) display become the main flow display of market to have replaced cathode-ray tube (CRT) at present substantially.LCD by shell, LCD show module (LCD Module, LCM), A/D plate, backlight drive plate and various cable form.LCM is used for display image, comprises chase, display panels, module backlight and following chase, and module wherein backlight comprises backlight bar, light guide plate and blooming piece etc.; The A/D plate is used for VGA (VideoGraphics Array) signal or digital visual interface (the Digital Visual Interface of main frame output, DVI) conversion of signals is Low Voltage Differential Signal (Low-Voltage Differential Signaling, and this signal is transferred to the display panels of LCM by client cables LVDS); In addition, the A/D plate also will be imported power supply and be connected on the backlight drive plate; The backlight drive plate is connected with LCM, is used for lighting the backlight bar of LCM.
Hand-written liquid crystal display is plurality of advantages such as gained, intuitive and convenient as a kind of emerging product because of it is drawn, more and more is subjected to people's favor.The general fashion that adds handwriting functions to LCD is to increase hand-written touch module on LCD, as resistive touch diaphragm, capacitance touch diaphragm etc.The electromagnetic type touch apparatus can obtain the angle of inclination and the pressure information of time writer, thereby make things convenient for the user to carry out handwriting input owing to the bearing accuracy height.The electromagnetic type touch apparatus comprises electromagnetic induction antenna plate, electromagnetic induction control panel and time writer.Regularly on the electromagnetic induction antenna plate be provided with densely covered coil, the electromagnetic induction control panel can switch the emission of electromagnetic field at a high speed, can also receive the signal of induced electricity magnetic pen emission.The electromagnetic induction control panel transmits by the electromagnetic induction antenna plate, in the magnetic field range that produces, the electromagnetic signal that the time writer of built-in resonance electronic loop is sensed to the emission of electromagnetic induction antenna plate, after the electromagnetic induction antenna plate receives signal, give the electromagnetic induction control panel with its conduction, according to this signal, calculate coordinate, angle of inclination, mode of operation such as speed, the pressure sensitivity etc. of time writer by the electromagnetic induction control panel, these information are sent to computing machine through USB interface.
Usually, hand-written liquid crystal display has three lines and exposes in display outside: power lead, video signal cable (video signal cable that comprises VGA or DVI or extended formatting) and USB line.Wherein, power lead provides power supply for handwriting screen; Video signal cable is used to provide vision signal, and the USB line is used for transmitting hand-written data, and the USB line generally is connected to the USB mouth of main frame.Relative conventional liquid crystal, though hand-written LCD only many this single line of USB line, bring a lot of troubles can for manufacturer and client, manufacturer's meeting be revised mould because of this root USB line, and the user also has a lot of inconvenience when using.In addition, use a USB line to connect display and main frame, also limited the movability of hand-written LCD, promptly can only on this main frame or adjacent main frame, realize handwriting functions.
In addition, because the hand-written part of hand-written liquid crystal display is in running order always after the power supply power supply, at this moment, if wireless receiver is not connected on the main frame, the hand-written scanning of so hand-written part will can really not worked with monitoring, and consumes energy, run counter to the aim of " low-carbon (LC) ".
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention at first is to simplify the structure of hand-written liquid crystal display, secondly is the mobility that improves product, reduces the energy consumption of product.
(2) technical scheme
For this reason, the invention provides a kind of liquid crystal display that possesses function of electromagnetic induction, comprising:
Electromagnetic induction module comprises electromagnetic induction control module and electromagnetic induction antenna element, and described electromagnetic induction module is used for detecting, calculates time writer information and is converted to the digital signal transmission;
First wireless communication module is connected with described electromagnetic induction module, and the time writer information that is used for receiving sends;
Second wireless communication module is connected with computing machine, is used to receive the time writer information of described first wireless communication module communication transmission and be sent to computing machine.
Wherein, described first wireless communication module comprises: electromagnetic induction module interface, transmission/receiving element and send/receive antenna,
Described electromagnetic induction module interface is connected with described electromagnetic induction control module, is used to receive the time writer information that the electromagnetic induction control module sends, and is sent to transmission/receiving element; Also be used for the data from described transmission/receiving element are sent to the electromagnetic induction control module;
Described transmission/receiving element is used to receive described time writer information, and described time writer information is encoded, and the time writer information behind the transmission coding is to send/receive antenna; Also be used for the data from described send/receive antenna are sent to described electromagnetic induction module interface;
Described send/receive antenna is used for the time writer information behind the described coding is sent to second wireless communication module; Also be used for the data from described second wireless communication module are sent to transmission/receiving element.
Described first wireless communication module also comprises:
Transmission/reception control module is connected with transmission/receiving element with described electromagnetic induction module interface, is used to receive the time writer information of electromagnetic induction module interface transmission and be sent to transmission/receiving element; Also be used for the data from transmission/receiving element are sent to the electromagnetic induction module interface.
Described second wireless communication module comprises: reception/transmitting antenna, reception/transmitting element and computer interface,
Described reception/transmitting antenna, with the first wireless communication module wireless connections, the time writer information behind the coding that is used for receiving is sent to reception/transmitting element; Also be used for the data from described reception/transmitting element are sent to first wireless communication module;
Described reception/transmitting element is used for the time writer information behind the coding that receives is decoded; Decoded time writer information is sent to computer interface; Also be used for the data from described computer interface are sent to reception/transmitting antenna;
Described computer interface is connected with computing machine, is used for decoded time writer information is sent to computing machine, also is used for the data from described computing machine are sent to reception/transmitting element.
Described second wireless communication module also comprises:
Reception/sending controling unit is connected with computer interface with described reception/transmitting element, is used for the decoded time writer information that reception/transmitting element sends is handled; Time writer information after handling is sent to described computer interface.
Described first wireless communication module also is used to receive the heartbeat frame that second wireless communication module sends, and when receiving the heartbeat frame in timing, the scan function of electromagnetic induction control module is opened or kept to described electromagnetic induction control module; Otherwise close the scan function of electromagnetic induction control module.
The present invention also provides a kind of control method that possesses the liquid crystal display of function of electromagnetic induction, comprising:
After step 10, described liquid crystal display work on power, open the wireless receiving passage, receive the wireless signal that comes from the outside, simultaneously the setting-up time scope;
Whether step 20, judgement receive the heartbeat frame that second wireless communication module sends in the setting-up time scope; It is execution in step 40 then; Otherwise execution in step 50;
Step 50, close the scan function of electromagnetic induction control module, keep the wireless receiving function; Execution in step 60;
Described step 20 receives after the heartbeat frame in the setting-up time scope, also comprises:
Whether the ID of the heartbeat frame that step 30, judgement receive is consistent with the ID of electromagnetic induction module; It is execution in step 40 then; Otherwise execution in step 70;
Step 70, reset timing, execution in step 20.
(3) beneficial effect
Provided by the invention possess the liquid crystal display of function of electromagnetic induction by adopting radio communication device, cancelled the cable of transmission hand-written information in the existing hand-written liquid crystal display product, thereby simplified product structure, provide cost savings, improved the mobility of product, made user's use more convenient; Simultaneously, whether can normally receive the heartbeat frame that second wireless communication module sends, control the scan function of electromagnetic induction module flexibly, further reduce energy consumption, save the energy by monitoring.
Description of drawings
Fig. 1 is the liquid crystal display structural representation that possesses function of electromagnetic induction of the embodiment of the invention;
Fig. 2 is the structural representation of first wireless communication module of the embodiment of the invention;
Fig. 3 is the second wireless communication module structural representation of the embodiment of the invention;
Fig. 4 is the control method process flow diagram of the liquid crystal display that possesses function of electromagnetic induction of the embodiment of the invention;
Fig. 5 is the heartbeat frame data structure synoptic diagram of the embodiment of the invention.
Wherein, 1: electromagnetic induction module; 2: the first wireless communication modules; 3: the second wireless communication modules; 4: power module; 201: the electromagnetic induction module interface; 202: transmission/reception control module; 203: transmission/receiving element; 204: send/receive antenna; 301: reception/transmitting antenna; 302: reception/transmitting element; 303: reception/sending controling unit; 304: computer interface.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, be the liquid crystal display structural representation that possesses function of electromagnetic induction of the embodiment of the invention; The liquid crystal display of present embodiment comprises electromagnetic induction module 1, first wireless communication module 2 and second wireless communication module 3.Wherein electromagnetic induction module 1, comprise electromagnetic induction control module and electromagnetic induction antenna element, the electromagnetic induction control module transmits and receives electromagnetic wave by the electromagnetic induction antenna element, thereby determine, calculate the information such as position, track and pressure sensitivity of time writer, be referred to as time writer information in the present embodiment.Electromagnetic induction module 1 is used to detect, calculate the information of time writer and is converted to the digital signal transmission; First wireless communication module 2 is connected with electromagnetic induction module 1, and the time writer information that the electromagnetic induction module 1 that is used for receiving sends is sent to second wireless communication module 3; Second wireless communication module 3 is connected with computing machine, and the time writer information that is used for receiving with 2 communications of first wireless communication module is sent to computing machine; Present embodiment can also comprise power module 4, by the A/D plate of the LCD power module as present embodiment, is electromagnetic induction module 1 power supply.Wireless modes such as first wireless communication module 2 and second wireless communication module, 3 employing 2.4G are received and sent messages.
Again as shown in Figure 2, be the structural representation of first wireless communication module of the embodiment of the invention; First wireless communication module of present embodiment comprises electromagnetic induction module interface 201, transmission/reception control module 202, transmission/receiving element 203 and send/receive antenna 204.Wherein electromagnetic induction module interface 201 is connected with the electromagnetic induction control module of electromagnetic induction module 1, be used for keeping communicating by letter with electromagnetic induction module 1, receive the time writer information that the electromagnetic induction control module sends, and the information that receives sent to transmission/reception control module 202, transmission/receiving element 203 is handled and be sent to transmission/reception control module 202 with the time writer information that receives, information after transmission/receiving element 203 will be handled is encoded, and the time writer information behind the transmission coding is to send/receive antenna 204; Time writer information after send/receive antenna 204 will be encoded sends to second wireless communication module 3.
Wherein electromagnetic induction module interface 201 can also be used to receive the data that transmission/reception control module 202 sends, and sends it to electromagnetic induction module 1; Transmission/reception control module 202 also is used to receive the data of transmission/receiving element 203 transmissions and send it to electromagnetic induction interface 201, and send/receive antenna 204 also is used to receive the data of second wireless communication module transmission and send it to transmission/receiving element 203.
The transmission of present embodiment/reception control module 202 also can be set to one with electromagnetic induction module 1.
As shown in Figure 3, be the second wireless communication module structural representation of the embodiment of the invention, second wireless communication module of present embodiment comprises: reception/transmitting antenna 301, reception/transmitting element 302, reception/sending controling unit 303 and computer interface 304.Wherein reception/transmitting antenna 301 and 2 wireless connections of first wireless communication module are used to receive the time writer information behind the coding that first wireless communication module 2 sends, and this information is sent to reception/transmitting element 302; Reception/transmitting element 302 is used for the time writer information behind the coding is decoded; And send decoded information to reception/sending controling unit 303; Reception/sending controling unit 303 is used for decoded time writer information is handled, and the information after will handling is sent to computer interface 301; Computer interface 304 is connected with computing machine by USB mouth etc., is used for the time writer information after handling is sent to computing machine.Wherein reception/transmitting antenna 301 and reception/transmitting element 302 receive one or more time writer information from send/receive antenna 204.
Wherein computer interface 304 also be used for will receive the data that send of computing machine be sent to reception/sending controling unit 303; Reception/sending controling unit 303 also is used for the data that computer interface 304 sends are sent to reception/transmitting element 302; Reception/transmitting element 302 also is used for the data that reception/sending controling unit 303 sends are sent to reception/transmitting antenna 301; The data that reception/transmitting element 302 that reception/transmitting antenna 301 also is used for receiving sends are sent to first wireless communication module 2.
In the above-described embodiments, first wireless communication module also is used to receive the heartbeat frame that second wireless communication module sends, when first wireless communication module received the heartbeat frame in timing, the scan function of electromagnetic induction control module is opened or kept to electromagnetic induction module; Otherwise close scan function.Particularly, as shown in Figure 4, the control method process flow diagram for the liquid crystal display that possesses function of electromagnetic induction of the embodiment of the invention specifically comprises:
After step 10, liquid crystal display worked on power, first wireless communication module was opened the wireless receiving passage, received the wireless signal that comes from the outside, and started timing function simultaneously;
If first wireless communication module has been received the heartbeat frame from second wireless communication module in timing, and the ID that judges the heartbeat frame is identical with the ID of electromagnetic induction control module, think that then second wireless communication module that is connected with main frame has been in normal operating conditions, the electromagnetic induction control module is opened scan function so, to make things convenient for user's handwriting input.
Step 50, close the scan function of electromagnetic induction control module, keep the wireless receiving function; Execution in step 60;
If in timing, first wireless communication module is not received the heartbeat frame from second wireless communication module, thinks that then second wireless communication module does not have work, and then the electromagnetic induction control module will stop scanning, only keep the wireless receiving passage.
Step 70, reset timing, execution in step 20.
Certainly, under the situation that a plurality of hand-written equipment and one second wireless communication module are used, do not need to judge whether the ID of heartbeat frame is identical with the ID of this electromagnetic induction control module, as long as then hand-written equipment is received the heartbeat frame that second wireless communication module sends in timing, just open or keep hand-written scan function.
Second wireless communication module that is connected with computing machine is one to one with the liquid crystal display that possesses function of electromagnetic induction, promptly second wireless communication module only handle the wireless data that sends of supporting electromagnetic induction module, and the wireless data that other electromagnetic induction modules are sent does not process.Can use the heartbeat frame data structure of present embodiment this moment.As shown in Figure 5, be the heartbeat frame data structure synoptic diagram of the embodiment of the invention; Wherein the ID of heartbeat frame number, refer to ID number with the supporting electromagnetic induction control module of second wireless communication module; 0x55 and 0xAA are heartbeat flag of frame positions, and CRC is a check bit, to prevent occurring error in data in wireless transmission.If corresponding one second wireless communication module of some electromagnetic induction modules, so, " ID number " in the present embodiment data structure can.Certainly, this structure shown in Figure 5 is an embodiment of heartbeat frame, also can use other can realize the data structure of heartbeat frame function.
Provided by the invention possess the liquid crystal display of function of electromagnetic induction by adopting radio communication device, thereby cancelled the cable of transmission hand-written information in the existing hand-written liquid crystal display product, simplified product structure, provide cost savings, improved the mobility of product, made user's use more convenient; Simultaneously, whether can normally receive the heartbeat frame that second wireless communication module sends, control the scan function of electromagnetic induction control module flexibly, further reduce energy consumption, save the energy by monitoring.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (8)
1. a liquid crystal display that possesses function of electromagnetic induction is characterized in that, comprising:
Electromagnetic induction module comprises electromagnetic induction control module and electromagnetic induction antenna element, and described electromagnetic induction module is used for detecting, calculates time writer information and is converted to the digital signal transmission;
First wireless communication module is connected with described electromagnetic induction module, and the time writer information that is used for receiving sends;
Second wireless communication module is connected with computing machine, and the time writer information that is used for receiving with the described first wireless communication module communication is sent to computing machine.
2. the liquid crystal display that possesses function of electromagnetic induction as claimed in claim 1 is characterized in that, described first wireless communication module comprises: electromagnetic induction module interface, transmission/receiving element and send/receive antenna,
Described electromagnetic induction module interface is connected with described electromagnetic induction control module, is used to receive the time writer information that the electromagnetic induction control module sends, and is sent to transmission/receiving element; Also be used for the data from described transmission/receiving element are sent to the electromagnetic induction control module;
Described transmission/receiving element is used to receive described time writer information, and described time writer information is encoded, and the time writer information behind the transmission coding is to send/receive antenna; Also be used for the data from described send/receive antenna are sent to described electromagnetic induction module interface;
Described send/receive antenna is used for the time writer information behind the described coding is sent to second wireless communication module; Also be used for the data from described second wireless communication module are sent to transmission/receiving element.
3. the liquid crystal display that possesses function of electromagnetic induction as claimed in claim 2 is characterized in that, described first wireless communication module also comprises:
Transmission/reception control module is connected with transmission/receiving element with described electromagnetic induction module interface, is used to receive the time writer information of electromagnetic induction module interface transmission and be sent to transmission/receiving element; Also be used for the data from transmission/receiving element are sent to the electromagnetic induction module interface.
4. the liquid crystal display that possesses function of electromagnetic induction as claimed in claim 1 is characterized in that, described second wireless communication module comprises: reception/transmitting antenna, reception/transmitting element and computer interface,
Described reception/transmitting antenna, with the first wireless communication module wireless connections, the time writer information behind the coding that is used for receiving is sent to reception/transmitting element; Also be used for the data from described reception/transmitting element are sent to first wireless communication module;
Described reception/transmitting element is used for the time writer information behind the coding that receives is decoded; Decoded time writer information is sent to computer interface; Also be used for the data from described computer interface are sent to reception/transmitting antenna;
Described computer interface is connected with computing machine, is used for decoded time writer information is sent to computing machine, also is used for the data from described computing machine are sent to reception/transmitting element.
5. the liquid crystal display that possesses function of electromagnetic induction as claimed in claim 4 is characterized in that, described second wireless communication module also comprises:
Reception/sending controling unit is connected with computer interface with described reception/transmitting element, is used for the decoded time writer information that reception/transmitting element sends is handled; Time writer information after handling is sent to described computer interface.
6. the liquid crystal display that possesses function of electromagnetic induction as claimed in claim 1, it is characterized in that, described first wireless communication module also is used to receive the heartbeat frame that second wireless communication module sends, when receiving the heartbeat frame in timing, the scan function of electromagnetic induction control module is opened or kept to described electromagnetic induction control module; Otherwise close the scan function of electromagnetic induction control module.
7. the control method to the described arbitrary liquid crystal display that possesses function of electromagnetic induction of claim 1-6 is characterized in that, comprising:
After step 10, described liquid crystal display work on power, open the wireless receiving passage, receive the wireless signal that comes from the outside, simultaneously the setting-up time scope;
Whether step 20, judgement receive the heartbeat frame that second wireless communication module sends in the setting-up time scope; It is execution in step 40 then; Otherwise execution in step 50;
Step 40, open the scan function of electromagnetic induction control module;
Step 50, close the scan function of electromagnetic induction control module, keep the wireless receiving function; Execution in step 60;
Step 60, judge whether to receive heartbeat frame from second wireless communication module; It is execution in step 40 then; Otherwise execution in step 50.
8. control method as claimed in claim 7 is characterized in that, described step 20 receives after the heartbeat frame in the setting-up time scope, also comprises:
Whether the ID of the heartbeat frame that step 30, judgement receive is consistent with the ID of electromagnetic induction module; It is execution in step 40 then; Otherwise execution in step 70;
Step 70, reset timing, execution in step 20.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101922499A CN102262312A (en) | 2010-05-26 | 2010-05-26 | Liquid crystal display equipment having electromagnetic induction function and control method thereof |
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| CN2010101922499A CN102262312A (en) | 2010-05-26 | 2010-05-26 | Liquid crystal display equipment having electromagnetic induction function and control method thereof |
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| CN102262312A true CN102262312A (en) | 2011-11-30 |
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| CN2010101922499A Pending CN102262312A (en) | 2010-05-26 | 2010-05-26 | Liquid crystal display equipment having electromagnetic induction function and control method thereof |
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| CN106600892A (en) * | 2016-10-10 | 2017-04-26 | 中国电力科学研究院 | Electromagnetic induction intensity monitoring and alarming device and system |
| CN104049830B (en) * | 2014-06-24 | 2017-07-18 | 北京汉王鹏泰科技有限公司 | For time writer and the exchange method of magnetic board |
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| CN101526679A (en) * | 2008-03-07 | 2009-09-09 | 群康科技(深圳)有限公司 | Touch-control liquid crystal display device |
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| WO2009041119A1 (en) * | 2007-09-27 | 2009-04-02 | Sharp Kabushiki Kaisha | Antenna device, display device substrate, liquid crystal display unit, display system, method for manufacturing antenna device and method for manufacturing display device substrate |
| CN201134088Y (en) * | 2007-12-29 | 2008-10-15 | 汉王科技股份有限公司 | Wireless display apparatus for hand-writing |
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| CN102880372A (en) * | 2012-06-04 | 2013-01-16 | 东莞市沃德电子科技有限公司 | Electromagnetic sensing type display |
| CN104049830B (en) * | 2014-06-24 | 2017-07-18 | 北京汉王鹏泰科技有限公司 | For time writer and the exchange method of magnetic board |
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Application publication date: 20111130 |