CN208689586U - The scanner video circuit of integrated various video interface - Google Patents
The scanner video circuit of integrated various video interface Download PDFInfo
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- CN208689586U CN208689586U CN201821589196.2U CN201821589196U CN208689586U CN 208689586 U CN208689586 U CN 208689586U CN 201821589196 U CN201821589196 U CN 201821589196U CN 208689586 U CN208689586 U CN 208689586U
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Abstract
The utility model proposes a kind of scanner video circuits of integrated various video interface, including main control chip, LCD interface circuit, HDMI interface circuit and USB interface circuit；The vision signal pin of the main control chip connects LCD interface circuit；The VGA signal pin of the main control chip connects USB interface circuit；The HDMI signal pin of the main control chip connects HDMI interface circuit；The HDMI interface circuit includes HDMI interface, HDMI switch chip and protection circuit；The power pin connection protection circuit of the HDMI switch chip, the HDMI signal pin of the data in pin connection main control chip of the HDMI switch chip, the data out pin of the HDMI switch chip connect HDMI interface.Pass through setting HDMI interface circuit and USB interface circuit, guarantee that the information of scanner identification can be passed through HDMI interface simultaneously when using scanner by user respectively and USB interface is transferred on corresponding display, it does not need that data transformation interface in addition is arranged, circuit structure is simple, and transmission rate is fast.
Description
Technical field
The utility model relates to technical field, in particular to a kind of scanner video circuit of integrated various video interface.
Background technique
Barcode scanning gun is the product for modernizing commodity circulation management philosophy and technology development combination, due to easy to use, barcode scanning
Rifle is widely used in logistics, super market checkout etc., and existing barcode scanning gun is swept since the field of application is different in different industries
Code after by code scaning information be sent to display terminal show needs effect it is also different；Such as in super market checkout, often
It needs the data for scanning barcode scanning gun to be sent on two displays to show, a display is for being shown to customer this time
The Transaction Information of transaction, another display provide statistics, the inventory of commodity total price for being shown to cashier for cashier
Deng making things convenient for customers and check cash register information；Improve cash register speed.For logistic industry, in especially large-scale logistics warehouse, scanner
Code scaning information needs simultaneous display recipient information and delivery side's information, and the storage outbound letter of each logistics post of intermediate transfer
Breath, it usually needs the information of barcode scanning gun identification is shown that existing barcode scanning gun is just for certain using the large-size screen monitors LED of high definition
A industry sets specific display interface, cannot achieve the flexible conversion between each display device interfaces, it is therefore desirable to a kind of
The barcode scanning gun video circuit that various video interface can be inherited facilitates barcode scanning gun to apply at different industries field, carries out data
Display.
Utility model content
The purpose of this utility model aims to solve at least one of the technological deficiency.
To achieve the goals above, the embodiment of the utility model one side provides a kind of sweeping for integrated various video interface
Retouch rifle video circuit, including main control chip, LCD interface circuit, HDMI interface circuit and USB interface circuit；The main control chip
Vision signal pin connect LCD interface circuit；The VGA signal pin of the main control chip connects USB interface circuit；The master
The HDMI signal pin for controlling chip connects HDMI interface circuit；The HDMI interface circuit includes HDMI interface, HDMI switch core
Piece and protection circuit；The power pin connection protection circuit of the HDMI switch chip, the data of the HDMI switch chip are defeated
Enter the HDMI signal pin of pin connection main control chip, the data out pin of the HDMI switch chip connects HDMI interface.
In any of the above-described scheme preferably, the main control chip uses the embedded core of model FBGA441C80P
Piece.
In any of the above-described scheme preferably, the model PS321 of the HDMI switch chip.
In any of the above-described scheme preferably, the protection circuit includes the first triode, pull-up resistor, the first partial pressure
Resistance, the second divider resistance and third divider resistance, the emitter ground connection of first triode, collector connect pull-up resistor
One end, the other end of the pull-up resistor connects voltage source VCC, while connecting the power pin of HDMI switch chip, described
The other end of pull-up resistor connects one end of the first divider resistance, and the other end of first divider resistance connects the first triode
Base stage, second divider resistance one end connect HDMI switch chip power pin, second divider resistance it is another
The clock pins of end connection HDMI switch chip；The power supply pipe of one end connection HDMI switch chip of the third divider resistance
Foot, the data pins of the other end connection HDMI switch chip of the third divider resistance.
In any of the above-described scheme preferably, the LCD interface circuit includes LCD interface and multiple exclusions；Each institute
The vision signal pin of one end connection main control chip of exclusion is stated, the other end of each exclusion is correspondingly connected with LCD interface
One needle.
In any of the above-described scheme preferably, the USB interface circuit includes USB interface, the 4th resistance, the 5th electricity
Resistance, the 6th resistance, first capacitor, the second capacitor and third capacitor；First video pin of the USB interface connects the 4th resistance
One end, the 4th resistance the other end connection first capacitor one end；The other end of the first capacitor connects master control core
First VGA signal pin of piece；Second video pin of the USB interface connects one end of the 5th resistance, the 5th resistance
The other end connect the second capacitor one end；2nd VGA signal pin of the other end connection main control chip of second capacitor；
The third video pin of the USB interface connects one end of the 6th resistance, and the other end of the 6th resistance connects third capacitor
One end；3rd VGA signal pin of the other end connection main control chip of the third capacitor.
In any of the above-described scheme preferably, the USB interface circuit further includes bilateral diode protection location, described
There are three bilateral diode protection location is set altogether, each bilateral diode protection location is corresponding in turn to connection USB interface
First video pin, the second video pin and third video pin.
In any of the above-described scheme preferably, the bilateral diode protection location includes first diode, the two or two
Pole pipe and coupled capacitor；The connection of the anode of the cathode of the first diode and the second diode, and it is connected to USB interface simultaneously
The first video pin；The first diode anode connection coupled capacitor one end and ground connection, the coupled capacitor it is another
One end connects the cathode of the second diode and connects 5V voltage source.
According to a kind of scanner video circuit of integrated various video interface provided by the embodiment of the utility model, compared to
Existing scanner is arranged LCD display interface, facilitates scanner by identification by various video Interface integration in scanner
Data directly pass through liquid crystal display and are shown on scanner；By setting HDMI interface circuit and USB interface circuit, guarantee to use
The information of scanner identification can be passed through HDMI interface simultaneously when using scanner by family respectively and USB interface be transferred to it is corresponding
On display, do not need that data transformation interface in addition is arranged, circuit structure is simple, and transmission rate is fast, is able to achieve two displays
Data synchronous transfer；When use needs high definition to show in logistic industry, it is only necessary to be connected in the HDMI interface of scanner high
Clear video line can be realized transmission HD video data, facilitate scanner to be needed to carry out interface conversion according to different uses, have
It is suitable for the scanning demand of various industries conducive to scanner；Guarantor is respectively provided in HDMI interface circuit and USB interface circuit
Protection circuit, circuit structure is simple, and the spike that can effectively prevent transmission video signal moment from generating prevents spike
It is interfered caused by display signal.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is a kind of circuit of the scanner video circuit of integrated various video interface provided by the embodiment of the utility model
Structural block diagram；
Fig. 2 is LCD in a kind of scanner video circuit of integrated various video interface provided by the embodiment of the utility model
The circuit diagram of interface circuit；
Fig. 3 is HDMI in a kind of scanner video circuit of integrated various video interface provided by the embodiment of the utility model
The circuit diagram of interface circuit；
Fig. 4 is VGA in a kind of scanner video circuit of integrated various video interface provided by the embodiment of the utility model
The circuit diagram of interface circuit；
In figure: 1, main control chip；2, LCD interface circuit；3, HDMI interface circuit；4, USB interface circuit；
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
As shown in Figure 1, a kind of scanner video circuit of integrated various video interface of the utility model embodiment, including
Main control chip 1, LCD interface circuit 2, HDMI interface circuit and USB interface circuit 4；The vision signal pin of main control chip 1 connects
LCD interface circuit 2；The VGA signal pin of main control chip 1 connects USB interface circuit 4；The HDMI signal pin of main control chip 1 connects
Connect HDMI interface circuit；
HDMI interface circuit includes HDMI interface, HDMI switch chip and protection circuit；The power supply pipe of HDMI switch chip
Foot connection protection circuit, the HDMI signal pin of the data in pin connection main control chip 1 of HDMI switch chip, HDMI switch
The data out pin of chip connects HDMI interface.Main control chip 1 can use model FBGA441C80P in the present embodiment
Embedded chip.The chip supports various video to show, can extend a variety of display circuits simultaneously, therefore on this basis,
The random switching of the application VGA signal, LCD signal and HDMI signal may be implemented.
As shown in figure 3, the model PS321 of HDMI switch chip.Protecting circuit includes the first triode Q702, pull-up electricity
Hinder R724, the first divider resistance R730, the second divider resistance R729 and third divider resistance R727, the hair of the first triode Q702
Emitter grounding, collector connect one end of pull-up resistor R724, and the other end of pull-up resistor R724 connects voltage source VCC+5V, together
When connect the power pin POWER of HDMI switch chip, the other end of pull-up resistor R724 connects the first divider resistance R730's
One end, the other end of the first divider resistance R730 connect the base stage of the first triode Q702, and second one end divider resistance R729 connects
Connect the power pin of HDMI switch chip, the clock pins of the other end connection HDMI switch chip of the second divider resistance R729
SCL；The power pin POWER of one end connection HDMI switch chip of third divider resistance R727, third divider resistance R727's
The data pins of other end connection HDMI switch chip.The SCL pin of HDMI chip connects R728 and R725 with SDA pin and receives
Main control chip receives HDMI signal, and triode Q702 base stage connects the driving pin HDMI_HPI of main control chip, and driving pin is
When low level, triode ON, the 18th pin of HDMI chip is driven chip start-up operation, divider resistance R730/R729/
R727 is respectively the pull down resistor of pin SCL, pin SDA and power pin POWER, prevents surge and spike, is done
Disturb the quality of vision signal.
As shown in Fig. 2, LCD interface circuit includes LCD interface and multiple exclusions；One end of each exclusion connects master control
The vision signal pin of chip, the other end of each exclusion are correspondingly connected with a pin of LCD interface.LCD liquid crystal display
The displaying principle of screen is shown using power voltage supply, has voltage input that can show, main control chip leads to after exporting LVDS signal
It crosses townhouse resistance to boost, the resistance being arranged in general resistor chain, which is 22 ohm, can guarantee voltage increase to display screen
Operating voltage, can show the scanning information of scanner.Liquid crystal display on scanner is served only for display character, i.e., literary
Word, number or letter.Therefore the vision signal pin for the main control chip that exclusion is connected selects the I/O pin of main control chip i.e.
It can be achieved.
As shown in figure 4, USB interface circuit includes USB interface P3, the 4th resistance R95, the 5th resistance R96, the 6th resistance
R97, first capacitor C142, the second capacitor C134 and third capacitor C147；The 4th electricity of the first video pin 9 connection of USB interface
Hinder one end of R95, one end of the other end connection first capacitor C142 of the 4th resistance R95；The other end of first capacitor C142 connects
Connect the first VGA signal pin 23 of main control chip；Second video pin 8 of USB interface connects one end of the 5th resistance R96, the
The other end of five resistance R96 connects one end of the second capacitor C134；The of the other end connection main control chip of second capacitor C134
Two VGA signal pins 25；The third video pin 7 of USB interface connects one end of the 6th resistance R97, and the 6th resistance R97's is another
One end of end connection third capacitor C147；3rd VGA signal pin 26 of the other end connection main control chip of third capacitor V147.
USB interface circuit further includes bilateral diode protection location, there are three bilateral diode protection location is set altogether, each
Bilateral diode protection location is corresponding in turn to the first video pin, the second video pin and the third video of connection USB interface P3
Pin i.e. 7~9 feet.Bilateral diode protection location includes first diode D24, the second diode D25 and coupled capacitor C148；
The connection of the anode of the cathode of first diode D24 and the second diode D25, and it is connected to the first video tube of USB interface simultaneously
The 7th pin of foot；First diode to 4 anode connection coupled capacitor C148 one end and ground connection, coupled capacitor C148's is another
The cathode of the second diode D25 of end connection simultaneously connects 5V voltage source.VGA primary colour signal, that is, RGB tricolor signal, passes through connector
Tri- pins of 7-9 of P3 enter, and then after resistance R95~R97 isolation, are coupled to master control core by capacitor C147, C134, C142
The first VGA signal pin 23, the 2nd VGA signal pin 25, the 3rd VGA signal pin 26 of piece；Further.Two pole of double limiting
Pipe D24~D26 shields, and prevents because of electrostatic or input voltage abnormal damage integrated package.The 8th foot input through connector P3
G primary colour signal 24 feet of main control chip are also coupled to by R98 isolation, capacitor C136, used as synchronization signal.
When the present embodiment is in use, after scanning bar code or two dimensional code to be identified using the probe of scanner,
The bar code information that scanning obtains is sent to main control chip 1, the bar code information received is converted into show by main control chip 1
The vision signal shown will using the vision signal pin of main control chip 1 when user selects LCD display as display equipment
Vision signal is sent to LCD interface circuit 2；When the LCD interface circuit 2 of scanner is connect with LCD display, LCD is connect at this time
The vision signal received is sent to LCD display and shown by mouth circuit 2.LCD display is to be arranged on scanner
Liquid crystal display.
When user selects the common display screen of USB interface, when as external display device, believed using the VGA of main control chip 1
Vision signal is sent to USB interface circuit 4 by number pin；When the USB interface circuit 4 of scanner connects VGA line and external display
When screen connection, the vision signal received is sent to display screen and shown by USB interface circuit 4 at this time, described herein general
Display screen of holding high office is the display screen in desktop computer.It applies when scanner and needs in logistics center by scanning information, it is aobvious by high definition
When display screen is shown, the vision signal after conversion is sent to HDMI interface electricity by the HDMI signal pin of main control chip 1 at this time
HDMI switch chip in road, the conversion that HDMI switch chip has the vision signal received according to its chip itself at this time
Protocol conversion is high-definition video signal, and high-definition video signal is sent to high-definition display screen using HDMI interface and is shown.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and
Modification.The scope of the utility model is by appended claims and its equivalent limits.
Claims (8)
1. a kind of scanner video circuit of integrated various video interface, which is characterized in that including main control chip, LCD interface electricity
Road, HDMI interface circuit and USB interface circuit；The vision signal pin of the main control chip connects LCD interface circuit；The master
The VGA signal pin for controlling chip connects USB interface circuit；The HDMI signal pin connection HDMI interface electricity of the main control chip
Road；
The HDMI interface circuit includes HDMI interface, HDMI switch chip and protection circuit；The electricity of the HDMI switch chip
Source capsule foot connection protection circuit, the HDMI signal pin of the data in pin connection main control chip of the HDMI switch chip,
The data out pin of the HDMI switch chip connects HDMI interface.
2. the scanner video circuit of integrated various video interface according to claim 1, which is characterized in that the master control
Chip uses the embedded chip of model FBGA441C80P.
3. the scanner video circuit of integrated various video interface according to claim 2, which is characterized in that the HDMI
The model PS321 of switch chip.
4. the scanner video circuit of integrated various video interface according to claim 2 or 3, which is characterized in that described
Circuit is protected to include the first triode, pull-up resistor, the first divider resistance, the second divider resistance and third divider resistance, it is described
The emitter of first triode is grounded, and collector connects one end of pull-up resistor, and the other end of the pull-up resistor connects voltage
Source VCC, while the power pin of HDMI switch chip is connected, the other end of the pull-up resistor connects the one of the first divider resistance
End, the other end of first divider resistance connect the base stage of the first triode, and second divider resistance one end connects HDMI
The power pin of switch chip, the clock pins of the other end connection HDMI switch chip of second divider resistance；Described
The other end connection HDMI of the power pin of one end connection HDMI switch chip of three divider resistances, the third divider resistance is opened
Close the data pins of chip.
5. the scanner video circuit of integrated various video interface according to claim 1, which is characterized in that the LCD
Interface circuit includes LCD interface and multiple exclusions；The vision signal pin of one end connection main control chip of each exclusion, often
The other end of a exclusion is correspondingly connected with a pin of LCD interface.
6. the scanner video circuit of integrated various video interface according to claim 1, which is characterized in that the VGA
Interface circuit includes USB interface, the 4th resistance, the 5th resistance, the 6th resistance, first capacitor, the second capacitor and third capacitor；Institute
The the first video pin for stating USB interface connects one end of the 4th resistance, the other end connection first capacitor of the 4th resistance
One end；First VGA signal pin of the other end connection main control chip of the first capacitor；Second video of the USB interface
Pin connects one end of the 5th resistance, and the other end of the 5th resistance connects one end of the second capacitor；Second capacitor
2nd VGA signal pin of other end connection main control chip；The third video pin of the USB interface connects the one of the 6th resistance
End, one end of the other end connection third capacitor of the 6th resistance；The other end connection main control chip of the third capacitor
3rd VGA signal pin.
7. the scanner video circuit of integrated various video interface according to claim 6, which is characterized in that the VGA
Interface circuit further includes bilateral diode protection location, each described double there are three the bilateral diode protection location is set altogether
The first video pin, the second video pin and the third video pin of connection USB interface are corresponding in turn to diode protection unit.
8. the scanner video circuit of integrated various video interface according to claim 7, which is characterized in that described two-way
Diode protection unit includes first diode, the second diode and coupled capacitor；The cathode of the first diode and second
The anode of diode connects, and is connected to the first video pin of USB interface simultaneously；The anode of the first diode connects coupling
One end of capacitor and ground connection are closed, the other end of the coupled capacitor connects the cathode of the second diode and connects 5V voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821589196.2U CN208689586U (en) | 2018-09-28 | 2018-09-28 | The scanner video circuit of integrated various video interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821589196.2U CN208689586U (en) | 2018-09-28 | 2018-09-28 | The scanner video circuit of integrated various video interface |
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| Publication Number | Publication Date |
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| CN208689586U true CN208689586U (en) | 2019-04-02 |
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| CN201821589196.2U Active CN208689586U (en) | 2018-09-28 | 2018-09-28 | The scanner video circuit of integrated various video interface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007655A (en) * | 2019-04-19 | 2019-07-12 | 华南理工大学 | The acquisition of a kind of pair of LED packaging line creation data and tracing system and method |
-
2018
- 2018-09-28 CN CN201821589196.2U patent/CN208689586U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007655A (en) * | 2019-04-19 | 2019-07-12 | 华南理工大学 | The acquisition of a kind of pair of LED packaging line creation data and tracing system and method |
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