CN203552220U - Touch device of multiplex touch display screen - Google Patents
Touch device of multiplex touch display screen Download PDFInfo
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- CN203552220U CN203552220U CN201320717504.6U CN201320717504U CN203552220U CN 203552220 U CN203552220 U CN 203552220U CN 201320717504 U CN201320717504 U CN 201320717504U CN 203552220 U CN203552220 U CN 203552220U
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Abstract
The utility model discloses a touch device of a multiplex touch display screen. The touch device of the multiplex touch display screen comprises a USB interface, a processor, the touch display screen, a comparing module and an interface switching module. The comparing module is used for detecting whether an external host is plugged in or not. When the external host is not plugged in, a high level is output, the interface switching module controls the USB interface, the processor and the touch display screen to be electrically connected in sequence, and the processor supplies power to the display screen and the USB interface. When the external host is plugged in, a low level is output, the interface switching module controls the processor to be disconnected with the USB interface and the touch display screen, meanwhile, the USB interface is electrically connected with the touch display screen and the external host, the processor does not supply power to the USB interface and the touch display screen, and the external host supplies power to the touch display screen through the USB interface at the same time. Therefore, touch signals of the touch display screen can be transmitted to the external host through the USB interface, so that the external host is controlled, and the function of multiplex display and the function of touch control of the touch display screen are achieved.
Description
Technical field
The utility model relates to electronic device field, particularly a kind of touch control device of multiplexing touch display screen.
Background technology
Science and technology is advanced by leaps and bounds, electronic product towards more succinctly, today of more intelligent, more humane development, touch screen operation has become the control mode of main flow.The touch screen terminals such as mobile phone, computer, MP3, intelligent television have intuitive display, easy to operate, meet the features such as user's use habit.
Because the screen size of TV is large, certain customers are used televisor as PC(personal computer, personal computer) display of main frame is used to reach better viewing effect, but this kind of mode only limits to bench teat computer.And because TV touch-screen is electrically connected with the processor of the machine core board of inside television, make the data of TV touch-screen can not be defeated by PC main frame, therefore, can not control PC main frame by TV touch-screen.Visible, when existing televisor is used as the display of PC main frame, the touch-screen that can not serve as PC main frame is used, and its use scenes is single.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of touch control device of multiplexing touch display screen, to solve touch control device of the prior art, and can not be by the problem of touch control manner control external host.
In order to achieve the above object, the utility model has been taked following technical scheme:
A touch control device for multiplexing touch display screen, comprises USB interface, processor and touch display screen, and it also comprises:
For detection of external host, whether access USB interface, export the comparison module of corresponding low and high level signal;
For the low and high level signal of exporting according to comparison module, corresponding control USB interface, processor and touch display screen are electrically connected successively, or the control processor interface switching module that disconnects, make simultaneously USB interface to be electrically connected with touch display screen and external host with USB interface and touch display screen;
Described interface switching module connects USB interface, processor, touch display screen and comparison module, and described comparison module connects USB interface.
In the touch control device of described multiplexing touch display screen, described interface switching module comprises: first switches chip, second switches chip, the first diode and switch control unit;
The VCC end of described the first switching chip holds the D+ end and the D-that are connected VDD3V3 feeder ear, the first switching chip to hold HSD1+ end and the HSD1-that the D+ end that is connected respectively USB interface is held with D-, the S end of the first switching chip is connected the output terminal of comparison module, the first switching chip to hold the HSD2+ end and the HSD2-that are connected processor, the first switching chip to hold the HSD2+ ' end and the HSD2-' end that are connected respectively the second switching chip with OE;
The described second VCC ' end that switches chip is connected VDD3V3 feeder ear with OE ' end, the second S ' end that switches chip connects the output terminal of comparison module, the second D+ end that switches chip is connected described touch display screen with D-end, and the second HSD1+ ' end that switches chip is connected processor with HSD1-' end;
The positive pole of described the first diode connects the output terminal of described comparison module by switch control unit, the negative pole of the first diode connects the VUSB end of USB interface and the input end of comparison module.
In the touch control device of described multiplexing touch display screen, described switch control unit comprises metal-oxide-semiconductor, triode and the first resistance, the source electrode of described metal-oxide-semiconductor connects the positive pole of the first diode, the drain electrode of described metal-oxide-semiconductor connects 5V feeder ear, also by the collector of the first resistance connecting triode, the collector of the grid connecting triode of metal-oxide-semiconductor; The base stage of described triode connects the output terminal of comparison module, the grounded emitter of triode.
In the touch control device of described multiplexing touch display screen, described interface switching module also comprises the first pressure-sensitive protector and the second pressure-sensitive protector; One end of described the first pressure-sensitive protector connects the D+ end of USB interface, the other end ground connection of described the first pressure-sensitive protector; One end of described the second pressure-sensitive protector connects the D-end of USB interface, the other end ground connection of described the second pressure-sensitive protector.
In the touch control device of described multiplexing touch display screen, described interface switching module also comprises: the first filter unit, one end of described the first filter unit connects the VUSB end of negative pole, comparison module and the USB interface of the first diode, the other end ground connection of the first filter unit.
In the touch control device of described multiplexing touch display screen, it is the integrated chip of FUSB30MUX that described the first switching chip and the second switching chip all adopt model.
In the touch control device of described multiplexing touch display screen, described comparison module comprises amplifier chip and the second diode, and the pressure drop of described the first diode is greater than the pressure drop of the second diode;
The 2nd end of described amplifier chip connects the negative pole of described the first diode and the VUSB of USB interface end, the 3rd end of described amplifier chip connects the negative pole of described the second diode, the positive pole of described the second diode connects 5V feeder ear, the 1st end of described amplifier chip connects the base stage of described triode, the S end and second of the first switching chip switches the S ' end of chip, and the 8th end of amplifier chip connects Vcc_12V feeder ear.
In the touch control device of described multiplexing touch display screen, described amplifier chip adopts the integrated chip that model is RC4558.
In the touch control device of described multiplexing touch display screen, described comparison module also comprises the second filter unit, and one end of described the second filter unit connects the 8th end of described Vcc_12V feeder ear and amplifier chip, the other end ground connection of the second filter unit.
In the touch control device of described multiplexing touch display screen, described touch control device is panel computer or intelligent television.
Compared to prior art, the touch control device of the multiplexing touch display screen that the utility model provides, whether by comparison module, detect external host inserts, when external host does not insert, comparison module output high level, interface switching module is according to the low and high level signal of comparison module output, and corresponding control USB interface, processor and touch display screen are electrically connected successively and make processor to display screen and USB interface power supply; When external host inserts, comparison module output low level; Interface switching module control processor disconnects, makes simultaneously USB interface to be electrically connected with touch display screen and external host with USB interface and touch display screen, make processor not to USB interface and touch display screen power supply, by external host, USB interface and touch display screen are powered simultaneously, thereby make the touching signals of touch display screen be transferred to external host by USB interface, the control of realization to external host, realize the function of the multiplexing demonstration of touch display screen and touch control, increased the use scenes of touch control device.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the touch control device of the multiplexing touch display screen of the utility model.
Fig. 2 is the touch control device of the multiplexing touch display screen of the utility model wiring schematic diagram during as PAD pattern using.
Fig. 3 is the wiring schematic diagram of the touch control device of the multiplexing touch display screen of the utility model while using as touch-screen.
Fig. 4 is the circuit diagram of interface switching module in the touch control device of the multiplexing touch display screen of the utility model.
Fig. 5 is the circuit diagram of comparison module in the touch control device of the multiplexing touch display screen of the utility model.
Embodiment
The utility model provides a kind of touch control device of multiplexing touch display screen, for making the purpose of this utility model, technical scheme and effect clearer, clear and definite, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The touch control device of the multiplexing touch display screen that the utility model provides, for panel computer or intelligent television, this touch control device can be used as display device and uses, realize the viewing function of touch control device, when having inserted external host in its USB interface, the touch-screen that can be used as external host is used, and by touch control manner, has realized the control to external unit.The mode of operation of touch control device comprises main equipment pattern and from equipment mode, its mode of operation is identified automatically by touch control device, during use, only external host need be inserted in USB interface, and touch control device is by automatic switchover mode of operation.
Refer to Fig. 1, it is the structured flowchart of the touch control device of the multiplexing touch display screen of the utility model.As shown in Figure 1, the touch control device system of the multiplexing touch display screen that the utility model provides comprises: usb 1 01, processor 102(are CPU, CentralProcessingUnit, central processing unit), touch display screen 103, interface switching module 104 and comparison module 105.Described interface switching module 104 connects usb 1 01, processor 102, touch display screen 103 and comparison module 105, and described comparison module 105 connects usb 1 01.
Take touch control device as intelligent television, external host as desktop computer be example, described usb 1 01 can adopt the A type socket of standard USB2.0 interface, intelligent television can be connected with desktop computer by usb bus.
Whether described comparison module 105 accesses USB interface for detection of external host (not shown), and according to the insertion state of external host, exports corresponding low and high level signal.Wherein, when external host inserts in usb 1 01, described comparison module 105 output low levels; When external host does not insert in usb 1 01, described comparison module 105 is exported high level.
The low and high level signal of described interface switching module 104 for exporting according to comparison module 105, corresponding control usb 1 01, processor 102 and touch display screen 103 are electrically connected successively, or control processor 102 disconnects, makes simultaneously usb 1 01 to be electrically connected with touch display screen 103 and external host with usb 1 01 and touch display screen 103.
The utility model judges by comparison module 105 whether external host inserts in usb 1 01, when external host does not insert in usb 1 01, comparison module 105 is exported high level, make interface switching module 104 control usb 1 01, processor 102 and touch display screen 103 and be electrically connected successively, by processor, to usb 1 01 and touch display screen 103, powered; As shown in Figure 2, now touch control device is as main equipment for its connected mode, and now intelligent television is used its TV functions, in usb 1 01, can insert the USB device such as USB flash disk, mouse.
When external host inserts in usb 1 01, comparison module 105 output low levels, interface switching module 104 control processors 102 are disconnected with usb 1 01 and touch display screen 103, the power supply of disconnection process device 102 to usb 1 01 and touch display screen 103, make usb 1 01 be connected with touch display screen 103 and external host simultaneously, by external host, to usb 1 01 and touch display screen 103, powered; Now touch control device is as from equipment, its connected mode is switched to the mode of connection of Fig. 3 by Fig. 2, now intelligent television is used as the touch-screen of desktop computer, the touching signals that touch display screen 103 is exported can be transferred to desktop computer by usb bus, by touch display screen 103, desktop computer is controlled.
See also Fig. 4, it is the circuit diagram of interface switching module in the touch control device of the multiplexing touch display screen of the utility model.As shown in Figure 1 and Figure 4, in the touch control device of multiplexing touch display screen of the present utility model, described interface switching module 104 comprises: first switches chip U1, second switches chip U2, the first diode D1 and switch control unit 1041.
Wherein, the VCC end of described the first switching chip U1 holds the D+ end and the D-that are connected VDD3V3 feeder ear, the first switching chip U1 to hold HSD1+ end and the HSD1-that the D+ end that is connected respectively usb 1 01 is held with D-, the S end of the first switching chip U1 is connected the output terminal of comparison module 105, the first switching chip U1 to hold the HSD2+ end and the HSD2-that are connected processor 102, the first switching chip U1 to hold the HSD2+ ' end and the HSD2-' end that are connected respectively the second switching chip U2 with OE.
The described second VCC ' end that switches chip U2 is connected VDD3V3 feeder ear with OE ' end, the second S ' end that switches chip U2 connects the output terminal of comparison module 105, second switches HSD1+ ' end that the D+ end of chip U2 and D-end be connected described touch display screen 103, the second switching chip U2 is connected processor 102 and comparison module 105 input end with HSD1-' end.
It is high speed COMS bus exchange switch that described the first switching chip U1 and second switches chip U2, and all adopting model is the integrated chip of FUSB30MUX.The positive pole of described the first diode D1 connects the output terminal of described comparison module 105 by switch control unit 1041, the negative pole of the first diode D1 connects the VUSB end of usb 1 01.
When comparison module 105 is exported high level, SWICH signal and the second SWICH signal that switches the S ' end of chip U2 of the S end of the SWICH signal of the input end of switch control unit 1041, the first switching chip U1 are high level.This high level signal makes switch control unit 1041 conductings, and 5V voltage is powered to usb 1 01 by the first diode D1; Meanwhile, the first D+ end that switches chip U1 is connected respectively HSD1+ end with D-end and is connected respectively HSD1+ ' end and HSD1-' end with HSD1-end, the second D+ ' end that switches chip U2 with D-' end.Now, processor 102 is electrically connected with usb 1 01 and touch display screen 103, and the equipment that touches can be powered to the USB device of inserting usb 1 01.
When comparison module 105 output low level, SWICH signal and the second SWICH signal that switches the S ' end of chip U2 of the S end of the SWICH signal of the input end of switch control unit 1041, the first switching chip U1 are low level.This low level signal is closed switch control unit 1041, disconnects the power supply of usb 1 01; Meanwhile, the first D+ end that switches chip U1 is connected respectively HSD2+ end with D-end and is connected respectively HSD2+ ' end and HSD2-' end with HSD2-end, the second D+ ' end that switches chip U2 with D-' end.Now, the power supply that disconnection process device 102 is given usb 1 01 and touch display screen 103, and make usb 1 01 be connected touch display screen 103 by the first switching chip U1 and the second switching chip U2, principal part main frame is powered to usb 1 01 and touch display screen 103, the touching signals of touch display screen is input in external host by usb bus, realizes the touch control operation to external host.
Please continue to refer to Fig. 4, described switch control unit 1041 comprises triode Q1, metal-oxide-semiconductor Q2 and the first resistance R 1, the source electrode of described metal-oxide-semiconductor Q2 connects the positive pole of the first diode D1, the drain electrode of described metal-oxide-semiconductor Q2 connects 5V feeder ear, also by the collector of the first resistance R 1 connecting triode Q1, the collector of the grid connecting triode Q1 of metal-oxide-semiconductor Q2; The base stage of described triode Q2 connects the output terminal of comparison module 105, the grounded emitter of triode Q1.
In the present embodiment, described triode Q1 is NPN triode, and metal-oxide-semiconductor Q2 is P channel MOS tube.When comparison module 105 is exported high level, triode Q1 conducting, drags down the grid of metal-oxide-semiconductor Q2, and the now grid level of metal-oxide-semiconductor Q2 conducting lower than source level can be powered 5V feeder ear to the VUSB end of usb 1 01; When comparison module 105 output low level, triode Q1 cut-off, the grid level of metal-oxide-semiconductor Q2 is drawn high as high level by the first resistance R 1, and the grid level of metal-oxide-semiconductor Q2 is ended higher than source level, and 5V feeder ear can not be given the VUSB end power supply of usb 1 01.
It should be noted that triode Q1 and metal-oxide-semiconductor Q2 in switch control unit 1041 can also adopt the switching tube of other type to replace, and replace NPN triode as triode Q1 can adopt PNP triode to add phase inverter.
Further, described interface switching module 104 also comprises the first pressure-sensitive protector E1 and the second pressure-sensitive protector E2, and one end of described the first pressure-sensitive protector E1 connects the D+ end of usb 1 01, the other end ground connection of described the first pressure-sensitive protector E1; One end of described the second pressure-sensitive protector E2 connects the D-end of usb 1 01, the other end ground connection of described the second pressure-sensitive protector E2.The pressure-sensitive protection device of this first pressure-sensitive protector E1 and the second pressure-sensitive protector E2 high speed signal, prevents from damaging the first switching chip U1 and second and switches chip U2.
Further, described interface switching module 104 also comprises the first filter unit 1042, one end of described the first filter unit 1042 connects the VUSB end of negative pole, comparison module 105 and the usb 1 01 of the first diode D1, the other end ground connection of the first filter unit 1042.
This first filter unit 1042 is mainly used in when external host inserts, and removes from the noise signal of usb 1 01 input, makes the first switching chip U1 and second switch chip U2 and switches fast its inner conducting state.
During concrete enforcement, described the first filter unit 1042 comprises the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3; One end of the first capacitor C 1, one end of the second capacitor C 2 and one end of the 3rd capacitor C 3 are all connected the VUSB end of negative pole, comparison module 105 and the usb 1 01 of the first diode D1, the equal ground connection of the other end of the other end of the first capacitor C 1, the other end of the second capacitor C 2 and the 3rd capacitor C 3.
See also Fig. 5, it is the circuit diagram of comparison module in the touch control device of the multiplexing touch display screen of the utility model.As shown in Figure 1 and Figure 5, in the touch control device of the multiplexing touch display screen of the utility model, described comparison module 105 comprises amplifier chip U3 and the second diode D2, and the pressure drop of described the first diode D1 is greater than the pressure drop of the second diode D2.If the pressure drop of the first diode D1 is 0.3V, the pressure drop of the second diode D2 is 0.2V, makes to produce certain voltage difference between two inputs of amplifier chip U3, thereby can make amplifier chip U3 export corresponding low and high level signal.
The 2nd end of described amplifier chip U3 connects the negative pole of described the first diode D1 and the VUSB of usb 1 01 end, the 3rd end of described amplifier chip U3 connects the negative pole of described the second diode D2, the positive pole of described the second diode D2 connects 5V feeder ear, the 1st end of described amplifier chip U3 connects the base stage of described triode Q1, the S end and second of the first switching chip U1 switches S ' end of chip U2, and the 8th end of amplifier chip U3 connects Vcc_12V feeder ear.Described amplifier chip adopts the integrated chip that model is RC4558, and the 5th, 6,7 ends of described amplifier chip U3 are unsettled, the 4th end ground connection.
For guaranteeing the normal work of described comparison module 105, described comparison module 105 also comprises the second filter unit 1051, one end of described the second filter unit 1051 connects the 8th end of Vcc_12V feeder ear and amplifier chip, the other end ground connection of the second filter unit 1051.
Wherein, described the second filter unit 1051 comprises the 4th capacitor C 4 and the 5th capacitor C 5, one end of one end of described the 4th capacitor C 4 and the 5th electric capacity 5 is all connected the 8th end of Vcc_12V feeder ear and amplifier chip U3, the equal ground connection of the other end of the other end of the 4th capacitor C 4 and the 5th capacitor C 5.The 4th capacitor C 4 and the 5th capacitor C 5, for the voltage of Vcc_12V feeder ear output is carried out to voltage stabilizing and filtering, make the voltage of the 8th end of inputting amplifier chip U3 more stable, guarantee the normal stable work of amplifier chip U3.
Below take touch control device as intelligent television, external host as desktop computer be example, and in conjunction with Fig. 1, Fig. 4 and Fig. 5, the working method of the touch control device to multiplexing touch display screen of the present utility model is elaborated:
When touch control device (being intelligent television) powers on, the initial voltage of the VUSB end of usb 1 01 is 0V, the voltage of now inputting the 2nd end (being the negative input end of comparison module 105) of amplifier chip U3 is 0, and the voltage of the 3rd end (being the positive input terminal of comparison module 105) of input amplifier chip U3 is 5V, make the 1st end (being the output terminal of comparison module 105) the output high level of amplifier chip U3, now triode Q1 and the equal conducting of metal-oxide-semiconductor Q2, in the first diode D1, have electric current to flow through, 5V feeder ear is to the VUSB end power supply of usb 1 01; The first switching chip U1 and the second switching chip U2 are connected processor 102 and touch display screen 103 simultaneously, and the processor 102 of intelligent television inside is powered to touch display screen 103.
After described touch control device powers on, due to triode Q1 and metal-oxide-semiconductor Q2 conducting, making has electric current to pass through in the first diode D1, again because the pressure drop of this first diode D1 is 0.3V, make the voltage of the 2nd end (i.e. oppositely input) of amplifier chip U3 be: VUSB=5V-0.3V=4.7V, and now the 3rd end of amplifier chip U3 (being forward input) voltage is: 5V-V
d2=5-0.2=4.8V, the forward of amplifier chip U3 is inputted higher than reverse input, so output the 1st end output high level of amplifier chip U1, namely the SWITCH signal in Fig. 4 and Fig. 5 is high level, the first D+ end that switches chip U1 is connected respectively HSD1+ end and HSD1-end with D-end, the second D+ ' end that switches chip U2 is connected respectively HSD1+ ' end and HSD1-' end with D-' end, processor 102 is electrically connected with usb 1 01 and touch display screen 103, now the mode of operation of touch control device is main equipment pattern, by processor processor 102, power to usb 1 01 and touch display screen 103, thereby use the television-viewing function of intelligent television, now can also external USB flash disk on intelligent television etc. USB device.
When external host (as desktop computer) connects touch control device of the present utility model (as intelligent television) by usb bus, because the VUSB signal in Fig. 4 is to be powered by the USB of desktop computer, so VUSB=5V in Fig. 4, make the forward voltage of amplifier chip U3 just lower than reverse voltage, now the 1st end input low level of amplifier chip U3, therefore the SWITCH signal in Fig. 4 and Fig. 5 is low level, now the first internal signal that switches chip U1 and the second switching chip U2 carries out high speed switching, make the D+ end of the first switching chip U1 be connected respectively HSD2+ end and HSD2-end with D-end, the second D+ ' end that switches chip U2 is connected respectively HSD2+ ' end and HSD2-' end with D-' end, processor 102 and usb 1 01 and touch display screen 103 are disconnected, and usb 1 01 is connected with touch display screen 103, triode Q1 and metal-oxide-semiconductor Q2 all end simultaneously, 5V feeder ear powers to usb 1 01, change into by external host and powering to touch display screen 103 by usb 1 01, now the mode of operation of intelligent television is from equipment mode, as touch-screen, use, user can input touching signals in touch display screen 103, by usb 1 02, is transferred to desktop computer, and desktop computer is carried out to touch control operation.
In sum, the touch control device of the multiplexing touch display screen that the utility model provides can automatic decision touch control device mode of operation, avoid selecting the touch control device that mode of operation mistake causes to damage because of artificial, and by the connection status of interface switching module high speed handoff processor, USB interface and touch display screen, realized the function of the multiplexing demonstration of touch display screen and touch control, can guarantee that the performance of USB interface under two kinds of patterns is unaffected.And the process of whole identifying, switch mode realizes by hardware, reduced software work consumption.
In addition, the utility model can be used the touch-screen televisor of giant-screen as the touch-screen of other host computer, increased the use scenes of televisor, has increased the market competitiveness of televisor, is applicable to promoting the use of.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1. a touch control device for multiplexing touch display screen, comprises USB interface, processor and touch display screen, it is characterized in that, also comprises:
For detection of external host, whether access USB interface, export the comparison module of corresponding low and high level signal;
For the low and high level signal of exporting according to comparison module, corresponding control USB interface, processor and touch display screen are electrically connected successively, or the control processor interface switching module that disconnects, make simultaneously USB interface to be electrically connected with touch display screen and external host with USB interface and touch display screen;
Described interface switching module connects USB interface, processor, touch display screen and comparison module, and described comparison module connects USB interface.
2. the touch control device of multiplexing touch display screen according to claim 1, is characterized in that, described interface switching module comprises: first switches chip, second switches chip, the first diode and switch control unit;
The VCC end of described the first switching chip holds the D+ end and the D-that are connected VDD3V3 feeder ear, the first switching chip to hold HSD1+ end and the HSD1-that the D+ end that is connected respectively USB interface is held with D-, the S end of the first switching chip is connected the output terminal of comparison module, the first switching chip to hold the HSD2+ end and the HSD2-that are connected processor, the first switching chip to hold the HSD2+ ' end and the HSD2-' end that are connected respectively the second switching chip with OE;
The described second VCC ' end that switches chip is connected VDD3V3 feeder ear with OE ' end, the second S ' end that switches chip connects the output terminal of comparison module, the second D+ end that switches chip is connected described touch display screen with D-end, and the second HSD1+ ' end that switches chip is connected processor with HSD1-' end;
The positive pole of described the first diode connects the output terminal of described comparison module by switch control unit, the negative pole of the first diode connects the VUSB end of USB interface and the input end of comparison module.
3. the touch control device of multiplexing touch display screen according to claim 2, it is characterized in that, described switch control unit comprises metal-oxide-semiconductor, triode and the first resistance, the source electrode of described metal-oxide-semiconductor connects the positive pole of the first diode, the drain electrode of described metal-oxide-semiconductor connects 5V feeder ear, also by the collector of the first resistance connecting triode, the collector of the grid connecting triode of metal-oxide-semiconductor; The base stage of described triode connects the output terminal of comparison module, the grounded emitter of triode.
4. the touch control device of multiplexing touch display screen according to claim 2, is characterized in that, described interface switching module also comprises the first pressure-sensitive protector and the second pressure-sensitive protector; One end of described the first pressure-sensitive protector connects the D+ end of USB interface, the other end ground connection of described the first pressure-sensitive protector; One end of described the second pressure-sensitive protector connects the D-end of USB interface, the other end ground connection of described the second pressure-sensitive protector.
5. the touch control device of multiplexing touch display screen according to claim 2, it is characterized in that, described interface switching module also comprises: the first filter unit, one end of described the first filter unit connects the VUSB end of negative pole, comparison module and the USB interface of the first diode, the other end ground connection of the first filter unit.
6. the touch control device of multiplexing touch display screen according to claim 5, is characterized in that, it is the integrated chip of FUSB30MUX that described the first switching chip and the second switching chip all adopt model.
7. the touch control device of multiplexing touch display screen according to claim 3, is characterized in that, described comparison module comprises amplifier chip and the second diode, and the pressure drop of described the first diode is greater than the pressure drop of the second diode;
The 2nd end of described amplifier chip connects the negative pole of described the first diode and the VUSB of USB interface end, the 3rd end of described amplifier chip connects the negative pole of described the second diode, the positive pole of described the second diode connects 5V feeder ear, the 1st end of described amplifier chip connects the base stage of described triode, the S end and second of the first switching chip switches the S ' end of chip, and the 8th end of amplifier chip connects Vcc_12V feeder ear.
8. the touch control device of multiplexing touch display screen according to claim 7, is characterized in that, described amplifier chip adopts the integrated chip that model is RC4558.
9. the touch control device of multiplexing touch display screen according to claim 7, it is characterized in that, described comparison module also comprises the second filter unit, and one end of described the second filter unit connects the 8th end of described Vcc_12V feeder ear and amplifier chip, the other end ground connection of the second filter unit.
10. according to the touch control device of the multiplexing touch display screen described in claim 1-9 any one, it is characterized in that, described touch control device is panel computer or intelligent television.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320717504.6U CN203552220U (en) | 2013-11-13 | 2013-11-13 | Touch device of multiplex touch display screen |
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| CN201320717504.6U CN203552220U (en) | 2013-11-13 | 2013-11-13 | Touch device of multiplex touch display screen |
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| CN203552220U true CN203552220U (en) | 2014-04-16 |
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| CN201320717504.6U Expired - Fee Related CN203552220U (en) | 2013-11-13 | 2013-11-13 | Touch device of multiplex touch display screen |
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|---|---|
| CN (1) | CN203552220U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022448A (en) * | 2015-07-22 | 2015-11-04 | 深圳市康冠商用科技有限公司 | Stack based peripheral switching method and apparatus |
| CN107562286A (en) * | 2017-10-31 | 2018-01-09 | 深圳市康冠商用科技有限公司 | A kind of touch switching device of touch-control all-in-one machine |
| CN108614647A (en) * | 2018-03-12 | 2018-10-02 | 嘉兴钛众电子科技有限公司 | A method of switching touch function with analog signal |
| CN109752618A (en) * | 2019-03-22 | 2019-05-14 | 敦泰电子有限公司 | A kind of combination of touch screen detection chip and terminal device |
| CN114265803A (en) * | 2021-11-08 | 2022-04-01 | 深圳英博达智能科技有限公司 | Method for multiplexing standard DP interface and supporting USB touch screen |
| CN107562286B (en) * | 2017-10-31 | 2024-07-12 | 深圳市康冠商用科技有限公司 | Touch switching device of touch control all-in-one machine |
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2013
- 2013-11-13 CN CN201320717504.6U patent/CN203552220U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022448A (en) * | 2015-07-22 | 2015-11-04 | 深圳市康冠商用科技有限公司 | Stack based peripheral switching method and apparatus |
| CN107562286A (en) * | 2017-10-31 | 2018-01-09 | 深圳市康冠商用科技有限公司 | A kind of touch switching device of touch-control all-in-one machine |
| CN107562286B (en) * | 2017-10-31 | 2024-07-12 | 深圳市康冠商用科技有限公司 | Touch switching device of touch control all-in-one machine |
| CN108614647A (en) * | 2018-03-12 | 2018-10-02 | 嘉兴钛众电子科技有限公司 | A method of switching touch function with analog signal |
| CN108614647B (en) * | 2018-03-12 | 2020-12-15 | 嘉兴钛众电子科技有限公司 | Method for switching touch function by using analog signal |
| CN109752618A (en) * | 2019-03-22 | 2019-05-14 | 敦泰电子有限公司 | A kind of combination of touch screen detection chip and terminal device |
| US11789562B2 (en) | 2019-03-22 | 2023-10-17 | Focaltech Electronics, Ltd. | Touch screen detection chip combination and terminal device |
| CN114265803A (en) * | 2021-11-08 | 2022-04-01 | 深圳英博达智能科技有限公司 | Method for multiplexing standard DP interface and supporting USB touch screen |
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