CN105373509A - Tablet computer USB port expanding structure - Google Patents
Tablet computer USB port expanding structure Download PDFInfo
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- CN105373509A CN105373509A CN201510760062.7A CN201510760062A CN105373509A CN 105373509 A CN105373509 A CN 105373509A CN 201510760062 A CN201510760062 A CN 201510760062A CN 105373509 A CN105373509 A CN 105373509A
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- Prior art keywords
- usb
- resistance
- usb port
- panel computer
- module
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4009—Coupling between buses with data restructuring
- G06F13/4018—Coupling between buses with data restructuring with data-width conversion
Abstract
The invention discloses a tablet computer USB port expanding structure. The tablet computer USB port expanding structure comprises a control logic module, a bleeder circuit and an expanding jig, wherein the control logic module comprises a first logic signal output end, a second logic signal output end, a first logic signal input end and a second logic signal input end; the first logic signal output end and the second logic signal output end are connected with a switching module in the tablet computer; the switching module is connected with the USB port; the bleeder circuit comprises a first resistor, a second resistor, a third resistor and a fourth resistor; the expanding jig comprises butt joint port, a charging interface and a USB module; the butt joint port is connected with the charging interface and the USB module and is matched with the USB port; and the USB module is provided with a USB connector which can be connected with USB equipment. In the tablet computer USB port expanding structure, the demand of charging the tablet computer, transmitting data and discharging the external USB equipment can be satisfied through the setting of the expanding jig.
Description
Technical field
The present invention relates to panel computer USB port expansion technique field, particularly relate to a kind of panel computer USB port expansion structure.
Background technology
Panel computer has become existence day by day universal in current life.Panel computer is owing to only having a USB port, and charging and data are conveyed through this USB port and carry out in an asynchronous manner.Particularly, panel computer comprises mainboard and commutation circuit, USB port is connected with commutation circuit, commutation circuit is charger or USB device for what identify that USB port accesses, thus control USB interface unlatching charge mode or data-transmission mode, namely panel computer can not carry out charging and data transmission simultaneously.So, when panel computer is applied in production line, easily there is following problem:
(1) partial test needs to take USB port for a long time, and electricity can be caused to decline, and just can have influence on follow-up test when electricity drops to a certain degree to can not get supplementing;
(2) when needing in production run to use mouse, flash disk and keyboard simultaneously, need sequentially to insert use respectively, cannot accomplish to use simultaneously, cause producing line manpower consumption often, production run is more complicated also;
(3) part panel computer is in order to save cost, and can cancel some designs as LED, such production line test personnel accurately cannot know the state of panel computer;
(4) in order to reduce dull and stereotyped power consumption rate, there is office demand to need to insert USB device, and when USB device electricity is lower, needing first to be connected with flat board again its charging, affecting efficiency.
Summary of the invention
Based on the technical matters that background technology exists, the present invention proposes a kind of panel computer USB port expansion structure.
A kind of panel computer USB port expansion structure that the present invention proposes, for expanding the USB port of panel computer, it comprises steering logic module, bleeder circuit and expansion tool;
Steering logic module and bleeder circuit are installed in panel computer, and steering logic module comprises the first logical signal output terminal, the second logical signal output terminal, the first logic signal input end and the second logic signal input end; First logical signal output terminal is connected with the handover module in panel computer with the second logical signal output terminal, and handover module is connected with USB port;
Bleeder circuit comprises the first resistance, the second resistance, the 3rd resistance and the 4th resistance; First resistance first end connects power supply, and its second end connects the second resistance first end, and the second resistance second end connects the 3rd resistance first end, and the 3rd resistance second end connects the 4th resistance first end, the 4th resistance second end ground connection; USB port is connected with the second resistance second end, and the second logic signal input end is connected with the first resistance second end, and the first logic signal input end is connected with the 4th resistance first end;
Expansion tool comprises craft port, charging inlet and USB module; Craft port is connected with charging inlet and USB module, and matches with USB port, and USB module is provided with the USB connector that can connect USB device.
Preferably, handover module comprises usb signal switching chip and power supply chip.
Preferably, usb signal switches chip employing SGM7227.
Preferably, power supply chip adopts BQ24192RGER chip.
Preferably, USB module comprises USB modular converter and multiple USB connector, and USB modular converter connects craft port and multiple USB connector respectively.
Preferably, the quantity of USB connector is no less than three.
Preferably, USB modular converter adopts USB2514 chip.
Preferably, expand tool and be provided with LED.
Preferably, steering logic module comprises the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, and the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-type metal-oxide-semiconductor; The S pole of the first metal-oxide-semiconductor connects the first logic signal input end, and its D pole connects the first logical signal output terminal, its G pole ground connection; The S pole of the second metal-oxide-semiconductor connects the second logic signal input end, and its D pole connects the second logical signal output terminal, its G pole ground connection.
The annexation of panel computer USB port expansion structure bleeder circuit provided by the invention and USB port, make at USB port connecting charger respectively, when USB device and expansion tool, the resistance to earth of the first logic signal input end and the second logic signal input end is all different, thus make the first logic signal input end different with the voltage that the second logic signal input end inputs, and the level signal that the first logical signal output terminal and the second logical signal output terminal export respectively with the input voltage of the first logic signal input end and the second logic signal input end relative to, so, handover module can identify according to the access device of the output level of steering logic module to USB port, to carry out pattern switching to USB port.In the present invention, the setting of expansion tool, can meet the demand that panel computer carries out charging, data are transmitted and discharged to outside USB device simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of panel computer USB port expansion structure schematic diagram.
Embodiment
Panel computer shows touch-screen as one, is widely used by people due to its frivolous being easy to carry.Panel computer only has a USB port, its mainboard is connected with this USB port by handover module, when panel computer needs charging, USB port connecting charger, when panel computer needs to carry out data transmission or USB device needs to charge constantly by panel computer with USB device, USB port connects external USB equipment.Handover module is charger or USB device for what identify that USB port connects, to carry out pattern switching to USB port.
With reference to Fig. 1, a kind of panel computer USB port expansion structure that the present invention proposes, for expanding the USB port of panel computer, it comprises steering logic module, bleeder circuit and expansion tool.
Expansion tool comprises craft port, charging inlet and USB module.Craft port is connected with charging inlet and USB module, and matches with USB port, and USB module is provided with the USB connector that can connect USB device.Matched by craft port and USB port, expansion tool can be connected with panel computer, then expand tool by charging inlet and USB module connecting charger and USB device respectively, to meet the needs that panel computer carries out charging and data are transmitted simultaneously.
Steering logic module and bleeder circuit are installed in panel computer, and steering logic module comprises the first logical signal output terminal OUT1, the second logical signal output terminal OUT2, the first logic signal input end IN1 and the second logic signal input end IN2.First logical signal output terminal OUT1 is connected with the handover module in panel computer with the second logical signal output terminal OUT2, and handover module is connected with USB port.The level signal that handover module can export according to the first logical signal output terminal OUT1 and the level signal that the second logical signal output terminal OUT2 exports carry out pattern switching to USB port, such as, when the level signal that the first logical signal output terminal OUT1 exports and the level signal that the second logical signal output terminal OUT2 exports are 1, handover module switches USB port to charge mode, so that USB port connecting charger charges; When the level signal that the first logical signal output terminal OUT1 exports and the level signal that the second logical signal output terminal OUT2 exports are 0, handover module switches USB port to data-transmission mode, so that USB port connects USB device; When the level signal that the first logical signal output terminal OUT1 exports is 0 and the level signal that the second logical signal output terminal OUT2 exports is 1, handover module switches USB port to mode of extension, under this kind of pattern, USB port possesses charging and data-transformation facility simultaneously, so that USB port connects expansion tool.
Bleeder circuit comprises the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4.First resistance R1 first end connects power supply, and its second end connects the second resistance R2 first end, and the second resistance R2 second end connects the 3rd resistance R3 first end, and the 3rd resistance R3 second end connects the 4th resistance R4 first end, the 4th resistance R4 second end ground connection.USB port is connected with the second resistance R2 second end, and the second logic signal input end IN2 is connected with the first resistance R1 second end, and the first logic signal input end IN1 is connected with the 4th resistance R4 first end.
In present embodiment, the level signal of the level signal that the first logical signal output terminal OUT1 exports and the second logical signal output terminal OUT2 output is corresponding with the voltage that the voltage that the first logic signal input end IN1 receives and the second logic signal input end IN2 receive respectively.
In present embodiment, steering logic module comprises the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, and the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-type metal-oxide-semiconductor; The S pole of the first metal-oxide-semiconductor connects the first logic signal input end IN1, and its D pole connects the first logical signal output terminal OUT1, its G pole ground connection; The S pole of the second metal-oxide-semiconductor connects the second logic signal input end IN2, and its D pole connects the second logical signal output terminal OUT2, its G pole ground connection.When the voltage of the first logic signal input end IN1 input reaches certain value, first metal-oxide-semiconductor D pole and the conducting of S pole, its D pole has voltage to export, first logical signal output terminal OUT1 exports high level 1, otherwise, when first logic signal input end IN1 input voltage less or be 0 time, the first metal-oxide-semiconductor D pole and S pole cut-off, its D pole Non voltage output, the first logical signal output terminal OUT1 output low level 0.In like manner, when the voltage of the second logic signal input end IN2 input reaches certain value, the second logical signal output terminal OUT2 exports high level 1, otherwise, when second logic signal input end IN2 input voltage less or be 0 time, the second logical signal output terminal OUT2 output low level 0.
In present embodiment, when USB port connecting charger, charger substitutional resistance is infinitely great, therefore the first resistance R1, second resistance R2, 3rd resistance R3 carries out series connection dividing potential drop with the 4th resistance R4 to the power supply that the first resistance R1 is connected, first logic signal input end IN1 and the second logic signal input end IN2 all has voltage to input, by presetting the first resistance R1, second resistance R2, the resistance of the 3rd resistance R3 and the 4th resistance R4, such as the 4th resistance R4 selects large valued resistor, the size of the first logic signal input end IN1 and the second logic signal input end IN2 input voltage can be controlled, the first logical signal output terminal OUT1 and the second logical signal output terminal OUT2 is made all to export high level 1.When USB port connects USB device, the substitutional resistance of USB data line is infinitely small, so, second resistance R2 second end is by USB data line ground connection, now the 4th resistance R4 sky connects, so, and the first logic signal input end IN1 no-voltage input, so, the first logical signal output terminal OUT1 output low level 0; By controlling the second resistance R2 size, making it be less than the first resistance R1, the second resistance R2 dividing potential drop can be made less, thus the second logic signal input end IN2 input voltage is less, the second logical signal output terminal OUT2 output low level 0.When USB port connects expansion tool, because the substitutional resistance expanding tool is limited, can be such as 4.7kohm by its equivalence, now, 3rd resistance R3, the 4th resistance R4 and the equal place in circuit of expansion tool, so the second logic signal input end IN2 input voltage is comparatively large, and the second logical signal output terminal OUT2 exports high level 1; Because the first resistance R1 and the second resistance R2 dividing potential drop are comparatively large, the 4th electric resistance partial pressure is less, thus the first logic signal input end IN1 input voltage is less, the first logical signal output terminal OUT1 output low level 0.
In present embodiment, by the gating to the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, can arrange, when G pole and S pole tension difference are greater than 2V, metal-oxide-semiconductor conducting, and the first resistance is set respectively, second resistance, the resistance of the 3rd resistance and the 4th resistance is 10kohm, 2.2kohm, 86, 6kohm and 200kohm, so, when the first resistance R1 is connected to 5V power supply, according to charger, the difference of USB data line and expansion tool substitutional resistance, the input voltage of the first logic signal input end IN1 and the second logic signal input end IN2, the output level of the first logical signal output terminal OUT1 and the second logical signal output terminal OUT2 can meet relation as shown in following table one:
Table one USB port connects the logic corresponding relation of distinct device
| Equipment | Substitutional resistance | IN1 voltage | IN2 voltage | OUT1 level | OUT2 level |
| Charger | Infinitely great | 3.3V | 4.8V | 1 | 1 |
| USB device | Infinitely small | 0V | 0.9V | 0 | 0 |
| Expansion tool | 4.7 kohm | 0.95V | 2.2V | 0 | 1 |
In present embodiment, handover module comprises usb signal and switches chip and power supply chip, and usb signal switches chip and adopts SGM7227, and it is for controlling enabling of USB data transmission pattern.Power supply chip adopts BQ24192RGER chip, and it supports charging and discharging pattern, also can support input and output simultaneously, also be with overcurrent protection function.The use of BQ24192RGER chip, after USB port can be made to connect expansion tool, both by charging inlet charging, can be again the charging of expansion tool.
In present embodiment, USB module comprises USB modular converter and multiple USB connector, USB modular converter connects craft port and multiple USB connector respectively, particularly, the quantity of USB connector can be set to be no less than three, to meet the connection needs of mouse, keyboard and other USB device respectively.USB modular converter can adopt USB2514 chip, and its Ke Jiang mono-road usb signal is converted to four road usb signals.
In present embodiment, expansion tool is provided with LED L1, and after expansion tool works on power, LED L1 lights, so that user grasps expansion in real time, whether tool normally works.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (9)
1. a panel computer USB port expansion structure, for expanding the USB port of panel computer, is characterized in that, comprises steering logic module, bleeder circuit and expansion tool;
Steering logic module and bleeder circuit are installed in panel computer, and steering logic module comprises the first logical signal output terminal (OUT1), the second logical signal output terminal (OUT2), the first logic signal input end (IN1) and the second logic signal input end (IN2); First logical signal output terminal (OUT1) is connected with the handover module in panel computer with the second logical signal output terminal (OUT2), and handover module is connected with USB port;
Bleeder circuit comprises the first resistance (R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4); First resistance (R1) first end connects power supply, its second end connects the second resistance (R2) first end, second resistance (R2) second end connects the 3rd resistance (R3) first end, 3rd resistance (R3) second end connects the 4th resistance (R4) first end, the 4th resistance (R4) second end ground connection; USB port is connected with the second resistance (R2) second end, second logic signal input end (IN2) is connected with the first resistance (R1) second end, and the first logic signal input end (IN1) is connected with the 4th resistance (R4) first end;
Expansion tool comprises craft port, charging inlet and USB module; Craft port is connected with charging inlet and USB module, and matches with USB port, and USB module is provided with the USB connector that can connect USB device.
2. panel computer USB port expansion structure as claimed in claim 1, is characterized in that, handover module comprises usb signal and switches chip and power supply chip.
3. panel computer USB port expansion structure as claimed in claim 2, is characterized in that, usb signal switches chip and adopts SGM7227.
4. panel computer USB port expansion structure as claimed in claim 2, is characterized in that, power supply chip adopts BQ24192RGER chip.
5. panel computer USB port expansion structure as claimed in claim 1, it is characterized in that, USB module comprises USB modular converter and multiple USB connector, and USB modular converter connects craft port and multiple USB connector respectively.
6. panel computer USB port expansion structure as claimed in claim 5, it is characterized in that, the quantity of USB connector is no less than three.
7. panel computer USB port expansion structure as claimed in claim 5, is characterized in that, USB modular converter adopts USB2514 chip.
8. panel computer USB port expansion structure as claimed in claim 1, is characterized in that, expansion tool is provided with LED (L1).
9. panel computer USB port expansion structure as described in any one of claim 1 to 8, is characterized in that, steering logic module comprises the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, and the first metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-type metal-oxide-semiconductor; The S pole of the first metal-oxide-semiconductor connects the first logic signal input end (IN1), and its D pole connects the first logical signal output terminal (OUT1), its G pole ground connection; The S pole of the second metal-oxide-semiconductor connects the second logic signal input end (IN2), and its D pole connects the second logical signal output terminal (OUT2), its G pole ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510760062.7A CN105373509A (en) | 2015-11-09 | 2015-11-09 | Tablet computer USB port expanding structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510760062.7A CN105373509A (en) | 2015-11-09 | 2015-11-09 | Tablet computer USB port expanding structure |
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| CN105373509A true CN105373509A (en) | 2016-03-02 |
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| CN201510760062.7A Pending CN105373509A (en) | 2015-11-09 | 2015-11-09 | Tablet computer USB port expanding structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952933A (en) * | 2021-02-03 | 2021-06-11 | 广州视源电子科技股份有限公司 | Interface expansion device, electronic device and interface expansion method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101383627A (en) * | 2007-09-04 | 2009-03-11 | 大唐移动通信设备有限公司 | Device and method for terminal charger charging, USB charging and data communication |
| CN201523243U (en) * | 2009-10-09 | 2010-07-07 | 国意有限公司 | USB HUB circuit used for charging |
| CN204424619U (en) * | 2015-01-20 | 2015-06-24 | 基准电子股份有限公司 | USB hub |
-
2015
- 2015-11-09 CN CN201510760062.7A patent/CN105373509A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383627A (en) * | 2007-09-04 | 2009-03-11 | 大唐移动通信设备有限公司 | Device and method for terminal charger charging, USB charging and data communication |
| CN201523243U (en) * | 2009-10-09 | 2010-07-07 | 国意有限公司 | USB HUB circuit used for charging |
| CN204424619U (en) * | 2015-01-20 | 2015-06-24 | 基准电子股份有限公司 | USB hub |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952933A (en) * | 2021-02-03 | 2021-06-11 | 广州视源电子科技股份有限公司 | Interface expansion device, electronic device and interface expansion method |
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