CN107168467A - A kind of capacitance plate Intelligent flat - Google Patents

A kind of capacitance plate Intelligent flat Download PDF

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Publication number
CN107168467A
CN107168467A CN201710387686.8A CN201710387686A CN107168467A CN 107168467 A CN107168467 A CN 107168467A CN 201710387686 A CN201710387686 A CN 201710387686A CN 107168467 A CN107168467 A CN 107168467A
Authority
CN
China
Prior art keywords
capacitance plate
interface
complete machine
intelligent flat
isolator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710387686.8A
Other languages
Chinese (zh)
Inventor
马正
邬营杰
刘天保
陶炳俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Original Assignee
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shiyuan Electronics Thecnology Co Ltd, Guangzhou Shirui Electronics Co Ltd filed Critical Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority to CN201710387686.8A priority Critical patent/CN107168467A/en
Publication of CN107168467A publication Critical patent/CN107168467A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637Details related to the display arrangement, including those related to the mounting of the display in the housing
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/1613Constructional details or arrangements for portable computers
    • G06F1/1633Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1643Details related to the display arrangement, including those related to the mounting of the display in the housing the display being associated to a digitizer, e.g. laptops that can be used as penpads
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

The invention discloses a kind of capacitance plate Intelligent flat, including:Complete machine, capacitance plate, liquid crystal display panel and isolator, the liquid crystal display panel are arranged between the complete machine and the capacitance plate;Wherein, the complete machine includes power supply, TV mainboards, capacitance plate control panel and liquid crystal display screen drive board;The power supply is connected with the TV mainboards;The liquid crystal display screen drive board is connected with the liquid crystal display panel and the TV mainboards, and the capacitance plate control panel is connected with the capacitance plate;The capacitance plate control panel has first interface, and the TV mainboards have second interface, and the first interface is connected with the second interface by the isolator.The present invention is isolated by increasing isolator to complete machine with the capacitance plate, so that the connection interference that complete machine is subject to will not be conducted to the capacitance plate, it is ensured that the steady operation of capacitance plate.

Description

A kind of capacitance plate Intelligent flat
Technical field
The present invention relates to Intelligent flat field, more particularly to a kind of capacitance plate Intelligent flat.
Background technology
Intelligent flat is that the content being shown on display flat board is manipulated to realize man-machine interaction by touch technology Integration apparatus.Intelligent flat be integrated with projector, electronic whiteboard, curtain, sound equipment, television set, video conference terminal it is many Plant function, it is adaptable to Group Communication occasion, concentration solves the communication of meeting medium-long range audio frequency and video, various form meeting document high definitions Clear display, video file is played, live sound equipment, screen writing, and the systematization meeting such as file mark, preservation, printing and distribution is needed Ask, be widely used in the fields such as education and instruction, enterprise's meeting, commercial exhibition, communication environment, lifting Group Communication can be effectively improved Efficiency.
Conventional Intelligent flat is broadly divided into infrared screen Intelligent flat and capacitance plate according to touch type and intelligently put down at present Plate.Infrared ray of the infrared screen (Infrared Touch Screen Technology) by touch-screen and on touch-screen housing Transmitting is constituted with receiving sensing element, and Infrared emitting and receiving sensing element forms infra-red detection net in screen surface, Any touching object can change the infrared ray on contact and realize touch screen operation.Capacitance plate is sensed using the electric current of human body It is operated.The advantage of infrared touch panel is cheap, and not by electric current, voltage and electrostatic interference, suitable severe ring Border condition, has the disadvantage that resolution ratio is low, and due to adding housing, causes the increase of complete machine thickness.The advantage of capacitance plate is writing Experience is smooth, high resolution, and can accomplish that complete machine is frivolous, but the shortcoming of capacitance plate is easily to be produced drift by the interference of external environment Move, cause to touch and forbidden or can not touched writing.For example, when environment temperature, humidity change, can all cause the drift of capacitance plate Move, cause touch-control inaccurate.The drift reason of capacitance plate belongs to technical inadequate natural endowment, environment potential surface (including user Body) although farther apart with capacitance touch screen, bigger than finger area is more, and these factors all directly affect touch location Determination.
The content of the invention
But inventor has found during capacitance plate to be applied to Intelligent flat, particularly large-sized Intelligent flat, i.e., Make the influence for excluding external environmental interference, the phenomenon that hop or writing are interrupted, and this phenomenon still occurs in capacitance plate Producing cause not yet having rational explanation at present.Inventor by further study show that, it is main that this hop is produced Reason is that the noise signal and liquid crystal display panel and complete machine of external electrical entoilage can operationally be done to the ground connection generation of complete machine Disturb, the need for carrying out USB communications due to complete machine and capacitance plate and capacitance plate be powered, the ground connection of complete machine and capacitance plate Ground connection needs connection, and this interference for just causing complete machine to be grounded is transmitted to the ground connection of capacitance plate, and need to be with it during capacitance plate work The ground connection of body is as reference, therefore after ground connection is disturbed, it is possible to causes the change of reference, causes capacitance plate hop.
In view of the above-mentioned problems, it is an object of the invention to provide a kind of capacitance plate Intelligent flat, it can avoid complete machine to electricity The interference of Rong Ping ground connection, solves the hop phenomenon that capacitance plate is produced by interference.
The invention provides a kind of capacitance plate Intelligent flat, including:Complete machine, capacitance plate, liquid crystal display panel and isolator, The liquid crystal display panel is arranged between the complete machine and the capacitance plate;Wherein, the complete machine include power supply, TV mainboards, Capacitance plate control panel and liquid crystal display screen drive board;The power supply is connected with the TV mainboards;The liquid crystal display screen drive board and the liquid LCD panel and TV mainboards connection, the capacitance plate control panel are connected with the capacitance plate;The capacitance plate control panel With first interface, the TV mainboards have second interface, and the first interface passes through the isolator with the second interface Connection.
Preferably, the isolator has signal isolation function.
Preferably, the isolator has isolated from power function and signal isolation function simultaneously.
Preferably, the first interface and the second interface are USB interface, and the isolator is USB isolator.
Preferably, the first interface and the second interface are USB2.0 interfaces.
Preferably, the first interface and the second interface are USB3.0 interfaces.
Preferably, the first interface and the second interface are the interface based on VB1 agreements.
Preferably, the first interface and the second interface are the interface based on UART protocol.
Preferably, the first interface and the second interface are the interface based on SPI protocol.
Preferably, the first interface and the second interface are com port.
Preferably, the first interface and the second interface are the interface based on I2C agreements.
Preferably, the capacitance plate Intelligent flat also includes AD conversion module;The capacitance plate receives line by capacitance plate And capacitance plate output line is connected with the capacitance plate control panel, the AD conversion module is connected to the capacitance plate and received on line.
Preferably, the AD conversion module is arranged at one end being connected with the capacitance plate that the capacitance plate receives line.
Preferably, the complete machine also includes complete machine backboard, and the capacitance plate control panel is hung on the complete machine backboard;Institute State capacitance plate and receive line and the capacitance plate output line and drawn from the capacitance plate control panel, and along the inwall of the complete machine backboard The capacitance plate body is connected to after cabling;Wherein, the electric capacity, which receives line and the electric capacity output line, has conductor layer, parcel First insulating barrier of the conductor layer and the screen layer of parcel first insulating barrier, the screen layer and the complete machine backboard Insulation processing is carried out between inwall.
Preferably, the second insulating barrier for wrapping up the screen layer is provided with outside the screen layer;Or
Cross-over block is lined between the inwall of the screen layer and the complete machine backboard;Or
The inwall of the complete machine backboard posts insulating tape with the part that the screen layer is contacted.
Preferably, in addition to power isolator, the power supply passes through the power isolator and the capacitance plate control panel Connection.
Capacitance plate Intelligent flat provided in an embodiment of the present invention, by the TV mainboards and the capacitance plate control panel it Between add the isolator so that the interference that the earth terminal of the complete machine is subject to will not pass to the earth terminal to the capacitance plate, And then avoid capacitance plate and produce the phenomenon of hop because complete machine is interfered, improve the job stability of the capacitance plate.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in embodiment will be made below Simply introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of capacitance plate Intelligent flat provided in an embodiment of the present invention.
Fig. 2 is a kind of connection diagram of complete machine provided in an embodiment of the present invention.
Fig. 3 is the schematic diagram that complete machine provided in an embodiment of the present invention is isolated with capacitance plate by isolator.
Fig. 4 is the connection diagram between the interface provided in an embodiment of the present invention based on VB1 agreements.
Fig. 5 is the connection diagram between the interface provided in an embodiment of the present invention based on UART protocol.
Fig. 6 is the connection diagram between the interface provided in an embodiment of the present invention based on SPI protocol.
Fig. 7 is the schematic diagram of RS232 interfaces provided in an embodiment of the present invention.
Fig. 8 is the pin definition figure of Fig. 7 RS232 interfaces.
Fig. 9 is the pin definition figure of RS422 interfaces.
Figure 10 is the first pin definition figure of RS485 interfaces.
Figure 11 is second of pin definition figure of RS485 interfaces.
Figure 12 is the connection diagram between the interface provided in an embodiment of the present invention based on I2C agreements.
Figure 13 is complete machine provided in an embodiment of the present invention and another connection diagram of capacitance plate.
Figure 14 is the schematic cross-section that capacitance plate provided in an embodiment of the present invention is received.
Figure 15 is complete machine provided in an embodiment of the present invention and another connection diagram of capacitance plate.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Fig. 1 to Fig. 3 is referred to, the embodiments of the invention provide a kind of capacitance plate Intelligent flat 100, including:Complete machine 10, electricity Hold screen 20, liquid crystal display panel 30 and isolator 40, the liquid crystal display panel 30 is arranged at the complete machine 10 and the electric capacity Between screen 20;Wherein, the complete machine 10 includes power supply 11, TV mainboards 12, capacitance plate control panel 13 and liquid crystal display screen drive board 14.Institute State power supply 11 to be connected with the TV mainboards 12, the liquid crystal display screen drive board 14 connects with the liquid crystal display panel 30 and TV mainboards 12 Connect, the capacitance plate control panel 13 is connected with the capacitance plate 20;The capacitance plate control panel 13 has first interface, the TV Mainboard 12 has second interface, and the first interface is connected with the second interface by the isolator 40.
In embodiments of the present invention, the power supply 11 is powered to the TV mainboards 12, the liquid crystal display screen drive board 14 and institute Liquid crystal display panel 30 is stated to connect, thus earth terminal, the earth terminal of TV mainboards 12 and the liquid crystal display panel 30 of the power supply 11 Earth terminal be connected to each other.In the prior art, the TV mainboards 12 are directly connected with the capacitance plate control panel 13 by interface Connect to be communicated or be communicated and powered simultaneously (either power supply or communication can all cause the TV mainboards 12 with The capacitance plate control panel 13 is altogether), and the capacitance plate control panel 13 is also directly connected to the capacitance plate 20, thus it is actual On, earth terminal (i.e. the earth terminal of complete machine 10), the earth terminal of liquid crystal display panel 30 and the capacitance plate 20 of the power supply 11 Earth terminal all be connection.In practical work process, the noise signal of external electrical entoilage and the He of liquid crystal display panel 30 Complete machine 10 operationally may (the actual earth terminal of complete machine 10 be carried on the back for the complete machine of complete machine 10 to the earth terminal of the complete machine 10 Plate) interference is produced, because the earth terminal of complete machine 10 is connected with the earth terminal of the capacitance plate 20, thus the ground connection of the complete machine 10 The interference at end will be transmitted to the earth terminal of the capacitance plate 20, and need to be with the earth terminal of itself during the work of the capacitance plate 20 Level is as reference, therefore after the earth terminal of the capacitance plate 20 is disturbed, it is possible to causes the change of datum, causes There is hop in touch-control process in the capacitance plate 20.Particularly, when applied to large-sized capacitance plate, due to operating voltage Increase, this interference just becomes apparent, and possibly even occurring capacitance plate when serious can not write.
In embodiments of the present invention, in order to which the interference for the earth terminal for preventing the complete machine 10 is transmitted to the capacitance plate 20 Earth terminal, adds the isolator 40 between the TV mainboards 12 and the capacitance plate control panel 13.The isolator 40 Possess isolation features, i.e., ensure the TV mainboards 12 and the normal communication of capacitance plate control panel 13 and/or normal power supply and On the premise of communication so that the TV mainboards 12 turn into electrically segregate, independent with the capacitance plate control panel 13 Earth-free equipment.Wherein, for realizing that the technology of isolation includes but is not limited to transformer isolation, inductance loop seclusion, Magnetic isolation, optocoupler Isolation etc., the present invention is not specifically limited.
In summary, capacitance plate Intelligent flat 100 provided in an embodiment of the present invention, by the TV mainboards 12 with it is described 40 pairs of the isolator TV mainboards are added between capacitance plate control panel 13 with the capacitance plate control panel 13 to isolate, and are made The interference that is subject to of earth terminal of the complete machine 10 will not be transmitted to the earth terminal of the capacitance plate 20, and then avoid the electricity Hold screen 20 and produce the phenomenon of hop because earth terminal is interfered, improve the job stability of the capacitance plate 20.
For ease of the understanding of the present invention, some currently preferred embodiments of the present invention is done further described below.
Preferably, the first interface and the second interface are USB interface, and the isolator is USB isolator.
Wherein, the USB interface can be USB2.0 interfaces or USB3.0 interfaces, and the present invention is not specifically limited.Accordingly, The isolator is USB isolator.
By taking USB2.0 as an example, it includes 4 lines in physical layer:Two provide 5V power supplys and ground connection, two other to peripheral hardware (D+ and D-), which is constituted, can transmit the twisted-pair feeder of differential data.Wherein, D+ and the signal lines of D- two transmission height are passed through in USB transmission Level transmits data.
In the preferred embodiment, due to being communicated and being powered simultaneously between first interface and the second interface, Therefore the USB isolator need to be provided simultaneously with isolating the isolated from power function and isolation signals line (D+ and D-) of 5V power lines Signal isolation function.
Wherein, the technology of isolated from power function include but is not limited to transformer isolation, inductance loop seclusion, Magnetic isolation, it is special every From isolated from power, the present invention is not specifically limited.
The technology of signal isolation function includes but is not limited to light-coupled isolation, inductance loop seclusion, Magnetic isolation etc., and the present invention, which is not done, to be had Body is limited.
In the present embodiment, for example, the USB isolator can by ADUM4160 chips (usb signal isolator, every It is Magnetic isolation from principle) add isolated from power technology (such as powering up isolating chip) formation.In addition, in other implementations of the present invention In example, can also there are other methods while realizing isolated from power and signal isolation, these implementation methods are in the guarantee of the present invention Within the scope of, it will not be described here.
Preferably, the first interface and the second interface are the interface based on VB1 agreements.
As shown in figure 4, the communication protocol of VB1 data transfers is as follows:VB1 can use 2 controls in signals transmission Pin, one is hot plug pin HTPDN, and one is clock lock pin LOCKN, is both drawn high by pull-up resistor, is continuously height When, receiving device is accessed or in unactivated state in transmission end periphery.After receiving terminal cut-in operation, HTPDN is set low, start into Row CDRtraining (clock and data recovery), transmission end starts and locked clock frequency, and receiving terminal is completed after clock recovery, will LOCKN is set low, and starts ALNtraining, after the completion of just start the transmission of data available.
In the preferred embodiment, the isolator 40 may be based on the isolator of VB1 agreements, due to the first interface The transmission of communication signal is only carried out between the second interface, thus 40 need of the isolator possess signal isolation function i.e. Can, specific signal isolation function realizes that technology includes but is not limited to light-coupled isolation, Magnetic isolation, inductance loop seclusion etc., this implementation Example is not specifically limited.
Preferably, the first interface and the second interface are the interface based on UART protocol.
UART communication mode is as shown in figure 5, each UART interface includes four pin:VCC:Power pin, is usually 3.3v;GND:It is grounded pin;RXD:Receive data pin;TXD:Data pin is sent, its operation principle is will to transmit each of data Character one is transmitted with connecing one.Wherein everybody meaning it is as follows:Start bit:First send a logic " 0 " signal, represent to pass The beginning of defeated character.Data bits:And then after start bit.The number of data bits can be 4,5,6,7,8 etc., constitute a word Symbol.Generally use ASCII character.Transmit, positioned by clock since lowest order.Parity check bit:Data bits are added behind this position, So that the digit of " 1 " should be even number (even parity check) or odd number (odd), the correctness of data transmission is verified with this.Stop Position:It is the end mark of a character data.Can be 1,1.5, the high level of 2.Because data are in transmission line Upper timing, and each equipment has the clock of their own, it is likely that in the communications two equipment rooms occur in that it is slight not It is synchronous.Therefore stop position is not only to represent the end of transmission, and provides computer correction clock synchronous chance.It is applied to The digit of stop position is more, and the synchronous degrees of tolerance of different clocks is bigger, but data transmission rate is simultaneously also slower.Spare bits: In logical one state, represent there is no data transmission on current line.Baud rate:It is the index for weighing data transmission speed.Table Show the symbolic number (symbol) of transmission each second.The information content (bit number) of one symbology is relevant with the exponent number of symbol.Example Such as data transmission speed is 120 character per seconds, transmits and uses exponent characters No. 256, each symbology 8bit, then baud rate is exactly 120baud, bit rate is 120*8=960bit/s.
In a practical situation, UART has two kinds of connected modes, and the first is only to connect two pins of TXD and RXD, now institute Stating isolator 40 only needs possess signal isolation function.Second is that four pins are all connected, and now, the isolator 40 is needed It is provided simultaneously with signal isolation function and isolated from power function.
Preferably, the first interface and the second interface are the interface based on SPI protocol.
SPI communication process is as shown in fig. 6, SPI has 4 signal lines, respectively SCLK:Serial clock, for same step number According to transmission, exported by main frame;MOSI:Main frame exports slave input data line;MISO:Main frame inputs slave output data line;SS: Chip select line, low level effectively, is exported by main frame.On spi bus, multiple slaves can occur in a certain moment, but can only exist One main frame, main frame determines the slave to be communicated by chip select line.
In the present embodiment, because the first interface and the second interface only carry out signal communication, thus it is described every Only need possess signal isolation function from device 40.
Preferably, the first interface and the second interface are com port.
In the present embodiment, the com port can be for RS232 interfaces, RS422 interfaces, RS485 interfaces or other are self-defined Interface.
It is described separately below for three kinds of above-mentioned interfaces.
For the situation of RS232 interfaces:
As shown in fig. 7, RS232 interfaces have 9 pins, the definition of each pin is as shown in Figure 8, it can be seen that in order to enter Row communication, three pins of the company of having to are TXD pins, RXD pins and GND pin between first interface and second interface.Cause This, the isolator 40 need to possess isolated from power function and signal isolation function.
For the situation of RS422 interfaces:
The definition of each pin of RS422 interfaces is as shown in figure 9, wherein, ground wire pin can not even can connect, power pins one As do not connect.
Situation about being connected for ground wire and/or power line, now, the isolator 40 need to possess isolated from power function and letter Number isolation features.
For ground wire and the unconnected situation of power line, now, the isolator 40 possesses signal isolation function.
For the situation of RS485 interfaces.
RS485 interfaces have two kinds of definition, and Figure 10 the first definition includes 4 data transfer pins (TDA-/Y, TDB +/Z, RDA-/A, RDB+/B) and a ground wire pin GND.Ground wire pin does not connect typically.Now, the isolator 40 is needed Possesses signal isolation function.
In second of Figure 11 definition, RS485 interfaces include two data transfer pins (Data-/B/485-, Data+/ A/485+), a ground wire pin GND and a power supply wire pin (+9V).Ground wire pin and power supply wire pin do not connect typically , now, the isolator 40 need to possess signal isolation function.
It is preferred that, the first interface and the second interface are the interface based on I2C agreements.
As shown in figure 12, I2C buses are very simple in physical connection, respectively by SDA (serial data line) and SCL (strings Row clock line) and pull-up resistor composition.Principle of Communication is by the control to SCL and SDA line low and high level sequential, to produce Signal required for I2C bus protocols carries out the transmission of data.In bus idle state, this both threads is typically connect above Pull-up resistor draw high, each modular circuit that remain in high level, bus and connect is both that (main controller must be band to main controller Have cpu logic module) (or controlled device), it is transmitter (or receiver) again, but the main frame only one of which in system, clock signal Produced by main frame.
As seen from Figure 12, now, the isolator 40 need to possess signal isolation function.
Preferably, as shown in figure 13, the capacitance plate Intelligent flat 100 also includes AD conversion module 50;The capacitance plate 20 are connected by capacitance plate reception line 21 and capacitance plate output line 22 with the capacitance plate control panel 13, the AD conversion module 40 The capacitance plate is connected to receive on line 21.
As shown in figure 3, RX1, RX2, RX3 shown in Fig. 3 receive a part for line 21, the capacitance plate for the capacitance plate The touch signal (analog signal) that receiving line 21 is used to detect the capacitance plate 20 is sent to the capacitance plate control panel 13, The capacitance plate control panel 13 generates touch coordinate information according to the touch signal, and the touch coordinate information is sent to The TV mainboards 12, are converted into touch coordinate value, and be sent to external set by the TV mainboards 12 by the touch coordinate information Standby 60 (such as PC modules or Android module), the external equipment 60 is responded according to the touch coordinate value, and will response The image information generated afterwards is sent to TV mainboards 12, and described image signal and drive screen instruction are sent to described by the TV mainboards 12 Driving plate of liquid crystal display screen 14, the driving plate of liquid crystal display screen 14 liquid crystal display panel according to the drive screen order-driven 30, and finally show by display described image information.
In a practical situation, in Intelligent flat, in particularly large-sized Intelligent flat, the need for wiring, institute State capacitance plate receive line 21 may be long, this may result in the capacitance plate receive line 21 in transmission signal by compared with Big interference, especially, when the signal of transmission is analog signal, it can produce distortion and superposition clutter after being disturbed, and this Distortion and superposition clutter are difficult elimination and recovery, therefore this may result in that touch coordinate information is inaccurate, cause last touch Position judgment is inaccurate.
Therefore, in embodiments of the present invention, receive line 21 in each capacitance plate and add the AD conversion module 50, The AD conversion module 50 can convert analog signals into data signal, although data signal can also exist in transmitting procedure because The problem of disturbing and produce error code, but this error code can be eliminated by prior anti-interference coding, therefore can ensure The accuracy of touch coordinate information, improves the degree of accuracy that touch location judges.
Preferably, the AD conversion module 50 is arranged at the capacitance plate and receives being connected with the capacitance plate 20 for line 21 One end.
In the preferred embodiment, to be arranged at the capacitance plate receiving line 21 with the electric capacity for the AD conversion module 50 One end of the connection of screen 20, i.e., be just converted into number when analog signal has just been generated and obtained just in the capacitance plate reception transmission of line 21 Word signal, thus the problem of being difficult to recover after analog signal is disturbed can be mitigated to greatest extent, improve touch point judgement The degree of accuracy.
Currently, it should be appreciated that the AD conversion module 50 may also set up receives the close of line 21 in the capacitance plate The one end connected in the capacitance plate 20, the present invention is not specifically limited.
Preferably, the complete machine 10 also includes complete machine backboard, and the capacitance plate control panel 13 hang on the complete machine backboard On;The capacitance plate receives line 21 and the capacitance plate output line 22 is drawn from the capacitance plate control panel 13, and along described whole The capacitance plate is connected to after the inwall cabling of machine backboard;Wherein, the capacitance plate receives line 21 and the capacitance plate output line 22 have the screen layer of conductor layer, the first insulating barrier of the parcel conductor layer and parcel first insulating barrier, the shielding Insulation processing is carried out between layer and the inwall of the complete machine backboard.
In the present embodiment, the complete machine backboard is made up of metal material, and its one side play fixed supporting role, the TV Circuit board 12, the capacitance plate control panel 13 and various circuit board lids are all fixed on complete machine backboard.On the other hand, as above Described, the complete machine backboard is also the ground on ground maximum in complete machine 10, sense.In the prior art, the capacitance plate connects Take-up 21 and the capacitance touch screen emission lines 24 are close to the parallel cabling of inwall of the complete machine backboard, in the course of the work, whole Machine backboard may be disturbed by the liquid crystal display panel 30, and the complete machine backboard it is disturbed after will produce space radiation, These space radiations can disturb the signal that transmission in line 21 and the capacitance plate output line 22 is received in the capacitance plate.
Therefore, also referring to Figure 14, so that the capacitance plate receives line 21 as an example, in the present embodiment, the capacitance plate Receiving line 21 has conductor layer 211, the first insulating barrier 212 of the parcel conductor layer 211 and wraps up first insulating barrier 212 Screen layer 213, carry out insulation processing between the screen layer 213 and the complete machine backboard.
In the present embodiment, the conductor layer 211 is used to carrying out the transmission of signal, and first insulating barrier 212 is played pair The effect that the conductor layer 211 is insulated, the screen layer 213 can be metal screen layer, the sky of its maskable complete machine backboard Between radiate the interference to the signal of transmission in the conductor layer 211.Because the screen layer 233 is metal screen layer, therefore also Need to carry out insulation processing to the screen layer 213.
Specifically, the second insulating barrier 214 of the screen layer 213 can be wrapped up in the outer setting of the screen layer 213, also may be used To pad cross-over block between the screen layer 213 and the complete machine backboard so that the screen layer 213 and the complete machine backboard It is physically isolated, the part patch insulating tape that can also be contacted in the complete machine backboard with the screen layer 213 is insulated, Wherein, it is preferred that can in outer the second insulating barrier 214 for setting the parcel screen layer 213 of the screen layer 213, reached compared with Good insulation effect.
Similarly, the capacitance plate output line 22 also carries out similar insulation processing, and the present invention will not be described here.
Preferably, the Intelligent flat 100 also includes power isolator 70, and the power supply 11 passes through the power isolator 70 are connected with the capacitance plate control panel 13.
In some cases, the capacitance plate control panel 13 can not directly be powered by the TV mainboards 12 by interface.Example Such as, the pin of interface does not include power pins or power pins are not attached to or the pin of interface includes power pins, but carries The power supply of confession is not enough to drive the capacitance plate control panel 13 to work.Especially, for large-sized capacitance plate Intelligent flat, i.e., Interface is set there are power pins, the power supply provided by power pins is often not enough to drive the capacitance plate control panel 13.
Therefore, as shown in figure 15, in the preferred embodiment, the capacitance plate control panel 13 is directly supplied by the power supply 11 Electricity, then now, power isolator 70 is connected between the power supply 11 and the capacitance plate control panel 13, described for realizing Isolated from power between power supply 11 and the capacitance plate control panel 13, so that power supply 11, the ground connection of TV mainboards 12 and the electric capacity The ground connection of screen 20 does not reconnect, it is to avoid the connection interference that the earth terminal of the complete machine 10 is subject to has influence on the capacitance plate 20 Earth terminal.
It should be noted that similarly, the liquid crystal display screen drive board 14 also has two kinds of power supply modes, for reduced size Intelligent flat, the liquid crystal display screen drive board 14 can be powered by the TV mainboards 12, and for large-sized Intelligent flat, it is described Liquid crystal display screen drive board 14 need to be powered by the power supply 11.Above disclosed is only some preferred embodiments of the invention, when So the interest field of the present invention can not be limited with this, one of ordinary skill in the art will appreciate that realizing the complete of above-described embodiment Portion or part flow, and the equivalent variations made according to the claims in the present invention, still fall within and invent covered scope.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..

Claims (16)

1. a kind of capacitance plate Intelligent flat, it is characterised in that including:Complete machine, capacitance plate, liquid crystal display panel and isolator, institute Liquid crystal display panel is stated to be arranged between the complete machine and the capacitance plate;Wherein, the complete machine includes power supply, TV mainboards, electricity Hold screen control panel and liquid crystal display screen drive board;The power supply is connected with the TV mainboards;The liquid crystal display screen drive board and the liquid crystal Display panel and TV mainboards connection, the capacitance plate control panel are connected with the capacitance plate;The capacitance plate control panel tool There is first interface, the TV mainboards have second interface, and the first interface is connected with the second interface by the isolator Connect.
2. capacitance plate Intelligent flat according to claim 1, it is characterised in that the isolator has signal isolation work( Energy.
3. capacitance plate Intelligent flat according to claim 1, it is characterised in that the isolator has isolated from power simultaneously Function and signal isolation function.
4. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is USB interface, and the isolator is USB isolator.
5. capacitance plate Intelligent flat according to claim 4, it is characterised in that the first interface and the second interface For USB2.0 interfaces.
6. capacitance plate Intelligent flat according to claim 4, it is characterised in that the first interface and the second interface For USB3.0 interfaces.
7. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is the interface based on VB1 agreements.
8. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is the interface based on UART protocol.
9. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is the interface based on SPI protocol.
10. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is com port.
11. the capacitance plate Intelligent flat according to claims 1 to 3 any one, it is characterised in that the first interface and The second interface is the interface based on I2C agreements.
12. capacitance plate Intelligent flat according to claim 1, it is characterised in that the capacitance plate Intelligent flat also includes AD conversion module;The capacitance plate receives line by capacitance plate and capacitance plate output line is connected with the capacitance plate control panel, institute AD conversion module is stated to be connected on the capacitance plate reception line.
13. capacitance plate Intelligent flat according to claim 12, it is characterised in that the AD conversion module is arranged at described Capacitance plate receives one end being connected with the capacitance plate of line.
14. capacitance plate Intelligent flat according to claim 12, it is characterised in that the complete machine also includes complete machine backboard, The capacitance plate control panel is hung on the complete machine backboard;The capacitance plate receives line and the capacitance plate output line from described Capacitance plate control panel is drawn, and is connected to the capacitance plate body along after the inwall cabling of the complete machine backboard;Wherein, the electricity Holding reception line and the electric capacity output line has conductor layer, the first insulating barrier of the parcel conductor layer and parcel described first exhausted Insulation processing is carried out between the inwall of the screen layer of edge layer, the screen layer and the complete machine backboard.
15. capacitance plate Intelligent flat according to claim 14, it is characterised in that
The second insulating barrier for wrapping up the screen layer is provided with outside the screen layer;Or
Cross-over block is lined between the inwall of the screen layer and the complete machine backboard;Or
The inwall of the complete machine backboard posts insulating tape with the part that the screen layer is contacted.
16. the capacitance plate Intelligent flat according to claim 1,12 to 15 any one, it is characterised in that also including power supply Isolator, the power supply is connected by the power isolator with the capacitance plate control panel.
CN201710387686.8A 2017-05-26 2017-05-26 A kind of capacitance plate Intelligent flat Pending CN107168467A (en)

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PCT/CN2017/104992 WO2018214379A1 (en) 2017-05-26 2017-09-30 Smart tablet with capacitive touch screen

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