CN206819220U - Intelligent flat plate of capacitive screen - Google Patents
Intelligent flat plate of capacitive screen Download PDFInfo
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- CN206819220U CN206819220U CN201720604307.1U CN201720604307U CN206819220U CN 206819220 U CN206819220 U CN 206819220U CN 201720604307 U CN201720604307 U CN 201720604307U CN 206819220 U CN206819220 U CN 206819220U
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- complete machine
- intelligent flat
- isolator
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Abstract
The utility model discloses an electric capacity screen intelligence is dull and stereotyped, include: the liquid crystal display panel is arranged between the complete machine and the capacitive screen; the whole machine comprises a power supply, a TV mainboard, a capacitive screen control board and a liquid crystal screen drive board; the power supply is connected with the TV mainboard; the liquid crystal display drive board is connected with the liquid crystal display panel and the TV main board, and the capacitive screen control board is connected with the capacitive screen; the capacitive screen control board is provided with a first interface, the TV mainboard is provided with a second interface, and the first interface is connected with the second interface through the isolator. The utility model discloses an increase the isolator to the complete machine with the electric capacity screen is kept apart to make the ground connection interference that the complete machine received can not conduct for the electric capacity screen guarantees the stable work of electric capacity screen.
Description
Technical field
It the utility model is related 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 more
Kind function, suitable for 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 play, live sound equipment, screen writing, and the systematization meeting such as file mark, preservation, printing and distribution needs
Ask, be widely used in the fields such as education and instruction, enterprise's meeting, commercial exhibition, can be effectively improved and link up environment, lifting Group Communication
Efficiency.
Currently used Intelligent flat is broadly divided into infrared screen Intelligent flat and capacitance plate according to touch type intelligently puts down
Plate.Infrared screen (Infrared Touch Screen Technology) is by touch-screen and the infrared ray on touch-screen housing
Transmitting is formed 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 advantages of infrared touch panel is cheap, and not by electric current, voltage and electrostatic interference, suitable severe ring
Border condition, shortcoming are that resolution ratio is low, and due to adding housing, cause the increase of complete machine thickness.The advantages of capacitance plate is writing
Experience is smooth, high resolution, and can accomplish that complete machine is frivolous, but is easily to be produced drift by the interference of external environment the shortcomings that capacitance plate
Move, cause to touch and forbidden or can not touched writing.For example, when environment temperature, humidity change, it 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.
Utility model content
But capacitance plate is being applied to Intelligent flat by inventor, is found during particularly large-sized Intelligent flat, i.e.,
Make the influence for excluding external environmental interference, hop or the phenomenon that writing is interrupted, and this phenomenon still occurs in capacitance plate
Producing cause explained at present there has been no rational.Utility model people by further study show that, caused by this hop
Main cause is that the noise signal of external electrical entoilage and liquid crystal display panel and complete machine can produce to the ground connection of complete machine at work
Raw interference, because complete machine and capacitance plate carry out USB communications and the needs being powered to capacitance plate, the ground connection of complete machine and electric capacity
The ground connection of screen needs to connect, 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 during capacitance plate work
The ground connection of itself is used as reference, therefore after ground connection is disturbed, it is possible to cause the change of reference, cause capacitance plate hop.
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of capacitance plate Intelligent flat, it can avoid complete machine
Interference to the ground connection of capacitance plate, solves capacitance plate because of hop phenomenon caused by interference.
The utility model provides a kind of capacitance plate Intelligent flat, including：Complete machine, capacitance plate, liquid crystal display panel and every
From device, the liquid crystal display panel is arranged between the complete machine and the capacitance plate；Wherein, the complete machine includes power supply, TV
Mainboard, 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 institute
State liquid crystal display panel and TV mainboards connection, the capacitance plate control panel are connected with the capacitance plate；The capacitance plate control
Making sheet has a first interface, and the TV mainboards have a second interface, the first interface and the second interface by it is described every
Connected from device.
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, it is provided with the second insulating barrier for wrapping up the screen layer 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 contacts.
Preferably, in addition to power isolator, the power supply pass through the power isolator and the capacitance plate control panel
Connection.
The capacitance plate Intelligent flat that the utility model embodiment provides, by being controlled in the TV mainboards and the capacitance plate
The isolator is added between plate so that the interference that the earth terminal of the complete machine is subject to will not pass to being grounded to the capacitance plate
End, and then avoid capacitance plate and produce the phenomenon of hop because complete machine is interfered, improve the working stability of the capacitance plate
Property.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model, below by embodiment it is required use it is attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present utility model, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation for the capacitance plate Intelligent flat that the utility model embodiment provides.
Fig. 2 is a kind of connection diagram for the complete machine that the utility model embodiment provides.
Fig. 3 is the schematic diagram that the complete machine that the utility model embodiment provides is isolated with capacitance plate by isolator.
Fig. 4 is the connection diagram between the interface based on VB1 agreements that the utility model embodiment provides.
Fig. 5 is the connection diagram between the interface based on UART protocol that the utility model embodiment provides.
Fig. 6 is the connection diagram between the interface based on SPI protocol that the utility model embodiment provides.
Fig. 7 is the schematic diagram for the RS232 interface that the utility model embodiment provides.
Fig. 8 is the pin definition figure of Fig. 7 RS232 interface.
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 based on I2C agreements that the utility model embodiment provides.
Figure 13 is the complete machine that the utility model embodiment provides and another connection diagram of capacitance plate.
Figure 14 is the schematic cross-section that the capacitance plate that the utility model embodiment provides receives.
Figure 15 is the complete machine that the utility model embodiment provides and another connection diagram of capacitance plate.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1 to Fig. 3 is referred to, the utility model embodiment provides a kind of capacitance plate Intelligent flat 100, including：Complete machine
10th, capacitance plate 20, liquid crystal display panel 30 and isolator 40, the liquid crystal display panel 30 be arranged at the complete machine 10 with it is described
Between capacitance plate 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.The power supply 11 is connected with the TV mainboards 12, the liquid crystal display screen drive board 14 and the liquid crystal display panel 30 and TV master
Plate 12 is connected, and the capacitance plate control panel 13 is connected with the capacitance plate 20；The capacitance plate control panel 13 has first interface,
The TV mainboards 12 have second interface, and the first interface is connected with the second interface by the isolator 40.
In the utility model embodiment, the power supply 11 is powered to the TV mainboards 12, the liquid crystal display screen drive board 14
It is connected with the liquid crystal display panel 30, thus the earth terminal and LCD of the earth terminal of the power supply 11, TV mainboards 12
The earth terminal of plate 30 is connected to each other.In the prior art, the TV mainboards 12 and the capacitance plate control panel 13 are straight by interface
Connect in succession and (either power to be communicated or be communicated and powered simultaneously or communication can all cause the TV mainboards
12 with the capacitance plate control panel 13 altogether), and the capacitance plate control panel 13 is also directly connected to the capacitance plate 20, thus
In fact, the earth terminal and the electric capacity of the earth terminal (i.e. the earth terminal of complete machine 10) of the power supply 11, liquid crystal display panel 30
The earth terminal of screen 20 is all connection.In practical work process, the noise signal and liquid crystal display panel of external electrical entoilage
30 and complete machine 10 at work may to the earth terminal of the complete machine 10 (the actual earth terminal of complete machine 10 be complete machine 10 complete machine
Backboard) interference is produced, because the earth terminal of complete machine 10 is connected with the earth terminal of the capacitance plate 20, thus the complete machine 10 connects
The interference of ground terminal 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 as reference, therefore when the capacitance plate 20 earth terminal be disturbed after, it is possible to cause the change of datum, lead
The capacitance plate 20 is caused hop occur in touch-control process.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 the utility model embodiment, in order to prevent the interference of the earth terminal of the complete machine 10 to be transmitted to the capacitance plate
20 earth terminal, the isolator 40 is added between the TV mainboards 12 and the capacitance plate control panel 13.The isolation
Device 40 possesses isolation features, that is, is ensureing the TV mainboards 12 and the normal communication of capacitance plate control panel 13 and/or normal confession
On the premise of electricity and communication so that the TV mainboards 12 turn into electrically segregate, only with the capacitance plate control panel 13
Vertical earth-free equipment.Wherein, for realize isolation technology include but is not limited to transformer isolation, inductance loop seclusion, Magnetic isolation,
Light-coupled isolation etc., the utility model is not specifically limited.
In summary, the utility model embodiment provide capacitance plate Intelligent flat 100, by the TV mainboards 12 with
Added between the capacitance plate control panel 13 isolator 40 the TV mainboards and the capacitance plate control panel 13 are carried out every
From so that the interference that the earth terminal of the complete machine 10 is subject to will not be transmitted to the earth terminal of the capacitance plate 20, and then avoid
The capacitance plate 20 produces the phenomenon of hop because earth terminal is interfered, and improves the job stability of the capacitance plate 20.
For ease of to understanding of the present utility model, doing to some preferred embodiments of the present utility model further retouch below
State.
Preferably, the first interface and the second interface are USB interface, and the isolator is USB isolator.
Wherein, the USB interface can be that USB2.0 interfaces or USB3.0 interfaces, the utility model are not specifically limited.Phase
Answer, 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-) forms the twisted-pair feeder that can transmit differential data.Wherein, height is transmitted by D+ and the signal lines of D- two 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 the isolated from power function and isolation signals line (D+ and D-) for isolating 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 utility model 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 utility model is not
It is specifically 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, it is of the present utility model other
In embodiment, can also there are other methods while realize isolated from power and signal isolation, these implementation methods are new in this practicality
Within the scope of the guarantee of type, 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, transmission end periphery accesses receiving device or in unactivated state.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, will after receiving terminal completes clock recovery
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 transmits 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., form a word
Symbol.Generally use ASCII character.Transmit since lowest order, positioned by clock.Parity check bit：After data bits add 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 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
If data transmission speed is 120 character per seconds, transmission uses exponent characters No. 256, each symbology 8bit, then baud rate is exactly
120baud, bit rate are 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 needs
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 is effective, 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 determine 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 RS232 interface, 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 interface：
As shown in fig. 7, RS232 interface has 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 needs
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, remain high level, in bus and each modular circuit for connecing 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 in system only has one, 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 50
The capacitance plate is connected to receive on line 21.
As shown in figure 3, RX1, RX2, RX3 shown in Fig. 3 are the part that the capacitance plate receives line 21, the capacitance plate
Line 21 is received to be used to the touch signal (analog signal) that the capacitance plate 20 detects being 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, the touch coordinate information is converted into touch coordinate value by the TV mainboards 12, and is sent to external set
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 described image information is finally shown by display.
In a practical situation, in Intelligent flat, in particularly large-sized Intelligent flat, due to the needs of 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 touch coordinate information inaccuracy, cause last touch
Position judgment is inaccurate.
Therefore, in the utility model embodiment, receive line 21 in each capacitance plate and add the AD conversion mould
Block 50, the AD conversion module 50 can convert analog signals into data signal, although data signal also can in transmitting procedure
The problem of in the presence of error code is produced because of interference, but this error code can be eliminated by prior anti-interference coding, therefore
The accuracy of touch coordinate information can be ensured, improve 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, it is receiving line 21 with the electric capacity to be arranged at the capacitance plate for the AD conversion module 50
One end of the connection of screen 20, i.e., just it is 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
In one end of the capacitance plate 20 connection, the utility model 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 can be made up of metal material, and its one side play fixed supporting role, described
TV circuit boards 12, the capacitance plate control panel 13 and various circuit board lids are all fixed on complete machine backboard.On the other hand, as before
Described in face, the complete machine backboard is also ground maximum in complete machine 10, the ground on sense.In the prior art, the capacitance plate
Receive line 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,
Complete machine backboard may be disturbed by the liquid crystal display panel 30, and the complete machine backboard it is disturbed after will produce space spoke
Penetrate, 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 parcel 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 plays 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 interference of the radiation 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 for wrapping up the screen layer 213 can be set outside 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, insulating tape can also be pasted in the part that the complete machine backboard contacts with the screen layer 213 and insulated,
Wherein, it is preferred that the second insulating barrier 214 for wrapping up the screen layer 213 can be set outside 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 utility model 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, not comprising power pins, either power pins are not attached to the pin of interface or the pin of interface includes power pins, but are carried
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, it is described for realizing
Isolated from power between power supply 11 and the capacitance plate control panel 13, so as to power supply 11, ground connection and the electric capacity of TV mainboards 12
The ground connection of screen 20 does not reconnect, and avoids the connection interference that the earth terminal of the complete machine 10 is subject to and 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 be directed to large-sized Intelligent flat, described
Liquid crystal display screen drive board 14 need to be powered by the power supply 11.It is above disclosed be only some preferred embodiments of the utility model and
, the interest field of the utility model can not be limited with this certainly, one of ordinary skill in the art will appreciate that realizing above-mentioned
All or part of flow of embodiment, and the equivalent variations made according to the utility model claims, still fall within utility model institute
The scope covered.
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)
- A kind of 1. 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 thatThe second insulating barrier for wrapping up the screen layer is provided with outside the screen layer；OrCross-over block is lined between the inwall of the screen layer and the complete machine backboard；OrThe inwall of the complete machine backboard posts insulating tape with the part that the screen layer contacts.
- 16. according to the capacitance plate Intelligent flat described in claim 1,12 to 15 any one, it is characterised in that also including power supply Isolator, the power supply are connected by the power isolator with the capacitance plate control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720604307.1U CN206819220U (en) | 2017-05-26 | 2017-05-26 | Intelligent flat plate of capacitive screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720604307.1U CN206819220U (en) | 2017-05-26 | 2017-05-26 | Intelligent flat plate of capacitive screen |
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| Publication Number | Publication Date |
|---|---|
| CN206819220U true CN206819220U (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720604307.1U Active CN206819220U (en) | 2017-05-26 | 2017-05-26 | Intelligent flat plate of capacitive screen |
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| CN (1) | CN206819220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168467A (en) * | 2017-05-26 | 2017-09-15 | 广州视源电子科技股份有限公司 | Intelligent flat plate of capacitive screen |
-
2017
- 2017-05-26 CN CN201720604307.1U patent/CN206819220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168467A (en) * | 2017-05-26 | 2017-09-15 | 广州视源电子科技股份有限公司 | Intelligent flat plate of capacitive screen |
| WO2018214379A1 (en) * | 2017-05-26 | 2018-11-29 | 广州视源电子科技股份有限公司 | Smart tablet with capacitive touch screen |
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