CN206805992U - Recording instrument without paper with backlight drive - Google Patents
Recording instrument without paper with backlight drive Download PDFInfo
- Publication number
- CN206805992U CN206805992U CN201720656824.3U CN201720656824U CN206805992U CN 206805992 U CN206805992 U CN 206805992U CN 201720656824 U CN201720656824 U CN 201720656824U CN 206805992 U CN206805992 U CN 206805992U
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- China
- Prior art keywords
- electric capacity
- backlight drive
- resistance
- backlight
- circuit
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Abstract
The utility model discloses a kind of recording instrument without paper with backlight drive, including master controller, SRAM video memorys chip, wireless communication module, display driver circuit, backlight drive circuit, key scanning circuit, USB interface, RJ45 interfaces, SATA interface, touch screen interface and display screen, SRAM video memory chips are connected with master controller, wireless communication module is connected with master controller, and display driver circuit, backlight drive circuit, key scanning circuit, USB interface, RJ45 interfaces, SATA interface and touch screen interface are connected with master controller；Backlight drive circuit includes series connection backlight driving chip, voltage-stabiliser tube, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, first resistor and the first inductance.The utility model has that multiple display modes, circuit structure are relatively simple, cost is relatively low, the safety and reliability of circuit is higher.
Description
Technical field
Recording instrument without paper field is the utility model is related to, more particularly to a kind of recording instrument without paper with backlight drive.
Background technology
Recording instrument without paper is exactly instantaneous waveform recorder device, and leading indicator is sample rate, internal memory unit, is had domestic
Also there are foreign countries.There is disk dress recording instrument without paper in the development of last decade computer software technology, and development in recent years is swift and violent, application
Extensively, powerful, power industry application is a lot.All signal cables are necessarily connected on instrument board, and there is office application scenario
It is sex-limited.Current recording instrument without paper display driving is relatively simple, and can only be driven for specific display screen, can not be at it
Shown in his equipment, its display mode is more single.In addition, the circuit part of traditional recording instrument without paper is complex, cost
It is higher, and due to lacking corresponding circuit protection function, cause the safety and reliability of circuit not high.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided one kind has more
Kind of display mode, circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher has backlight drive
Recording instrument without paper.
Technical scheme is used by the utility model solves its technical problem：Construct it is a kind of with backlight drive without paper
Recorder, including master controller, SRAM video memorys chip, wireless communication module, display driver circuit, backlight drive circuit, button
Scanning circuit, USB interface, RJ45 interfaces, SATA interface, touch screen interface and display screen, the SRAM video memorys chip with it is described
Master controller connects, and the wireless communication module is connected with the master controller, is mobile whole for the data of record to be sent to
End, the display driver circuit, backlight drive circuit, key scanning circuit, USB interface, RJ45 interfaces, SATA interface and touch
Screen interface is connected with the master controller, and the display screen connects with the display driver circuit and backlight drive circuit respectively
Connect；
The backlight drive circuit includes series connection backlight driving chip, voltage-stabiliser tube, the first electric capacity, the second electric capacity, the 3rd electricity
Appearance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, first resistor and the first inductance, the first of the series connection backlight driving chip draws
One end with second electric capacity, one end of the 3rd electric capacity, one end of the first inductance and power supply are connected pin respectively, and described
The other end of the other end of two electric capacity and the 3rd electric capacity is grounded, the other end of first inductance respectively with the backlight of connecting
One end connection of 6th pin of driving chip, the anode of voltage-stabiliser tube and the 4th electric capacity, the other end ground connection of the 4th electric capacity,
The negative electrode with the voltage-stabiliser tube, one end of the first electric capacity and positive voltage are defeated respectively for the second pin of the series connection backlight driving chip
Go out end connection, the other end ground connection of first electric capacity, the 3rd pin of the series connection backlight driving chip is respectively with described the
One end of one resistance connects with one end of the 5th electric capacity, the other end of the 5th electric capacity ground connection, the first resistor it is another
End be connected with pulse input end, and the 4th pin of the backlight driving chip of connecting is respectively with one end of the 6th electric capacity and bearing
Voltage output end connects, the other end ground connection of the 6th electric capacity, the 5th pin ground connection of the series connection backlight driving chip, institute
The capacitance for stating the 5th electric capacity is 20PF, and the capacitance of the 6th electric capacity is 15PF.
Described in the utility model with the recording instrument without paper of backlight drive, the backlight drive circuit also includes the
Two resistance, one end of the second resistance are connected with one end of second electric capacity, the other end of the second resistance with it is described
The the first pin connection for backlight driving chip of connecting, the resistance of the second resistance are 4.7K Ω, the electric capacity of the 5th electric capacity
It is worth for 20PF, the capacitance of the 6th electric capacity is 15PF.
Described in the utility model with the recording instrument without paper of backlight drive, the backlight drive circuit also includes the
Three resistance, one end of the 3rd resistor are connected with the other end of first inductance, the other end of the 3rd resistor and institute
The anode connection of voltage-stabiliser tube is stated, the resistance of the 3rd resistor is 100 Ω.
Described in the utility model with the recording instrument without paper of backlight drive, the backlight drive circuit also includes the
Four resistance, one end of the 4th resistance are connected with the 4th pin of the series connection backlight driving chip, the 4th resistance
The other end is connected with one end of the 6th electric capacity, and the resistance of the 4th resistance is 20 Ω.
Described in the utility model with the recording instrument without paper of backlight drive, the wireless communication module is bluetooth mould
Block, WIFI module, GPRS module, Zigbee module, CDMA module or WCDMA modules.
Implement the recording instrument without paper of the present utility model with backlight drive, have the advantages that：Due to provided with master
Controller, SRAM video memorys chip, wireless communication module, display driver circuit, backlight drive circuit, key scanning circuit, USB connect
Mouth, RJ45 interfaces, SATA interface, touch screen interface and display screen, the interface that it is set is more, can show on different devices
Show the data of record, backlight drive circuit includes series connection backlight driving chip, voltage-stabiliser tube, the first electric capacity, the second electric capacity, the 3rd electricity
Appearance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, first resistor and the first inductance, the 5th electric capacity and the 6th point are used to filter out miscellaneous
Ripple, thus with multiple display modes, circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 has the structural representation in recording instrument without paper one embodiment of backlight drive for the utility model；
Fig. 2 is the circuit theory diagrams of backlight drive circuit in the embodiment.
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.
, should the paperless tests with backlight drive in the utility model has the recording instrument without paper embodiment of backlight drive
The structural representation of instrument is as shown in Figure 1.In Fig. 1, the recording instrument without paper should with backlight drive shows including master controller 1, SRAM
Deposit chip 2, wireless communication module 3, display driver circuit 4, backlight drive circuit 5, key scanning circuit 6, USB interface 7, RJ45
Interface 8, SATA interface 9, touch screen interface 10 and display screen 11, wherein, SRAM video memorys chip 2 is connected with master controller 1, SRAM
The maximum of video memory chip 2 supports the colored display of 800*600 dot matrix, and wireless communication module 3 is connected with master controller 1, for that will record
Data be sent to mobile terminal, the data of record so can be not only shown by display screen 11, can also be in mobile terminal
On shown, display driver circuit 4, backlight drive circuit 5, key scanning circuit 6, USB interface 7, RJ45 interfaces 8, SATA
Interface 9 and touch screen interface 10 are connected with master controller 1, and display screen 11 is electric with display driver circuit 4 and backlight drive respectively
Road 5 connects.
It is noted that master controller 1 passes through USB interface 7, RJ45 interfaces 8, SATA interface 9 and touch screen interface 10
Different equipment can be connected, the data can of recording instrument without paper record that so should be with backlight drive is in different equipment
On shown, therefore it has multiple display modes.
Above-mentioned wireless communication module 3 can be bluetooth module, WIFI module, GPRS module, Zigbee module, CDMA module
Or WCDMA modules etc..Mobile terminal can be mobile phone or tablet personal computer etc..
Fig. 2 is the circuit theory diagrams of backlight drive circuit in the present embodiment, and in Fig. 2, the backlight drive circuit 5 includes series connection
Backlight driving chip U1, voltage-stabiliser tube D1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity
C5, the 6th electric capacity C6, first resistor R1 and the first inductance L1, wherein, series connection backlight driving chip U1 the first pin respectively with
Second electric capacity C2 one end, the 3rd electric capacity C3 one end, the first inductance L1 one end connect with power supply VCC, power supply
VCC provides power supply for series connection backlight driving chip U1, and the second electric capacity C2 other end and the 3rd electric capacity C3 other end are grounded
GND, input voltage is filtered by the second electric capacity C2 and the 3rd electric capacity C3, filter effect is more preferably.
The first inductance L1 other end respectively the 6th pin with the backlight driving chip U1 that connects, voltage-stabiliser tube D1 anode and
4th electric capacity C4 one end connection, the 4th electric capacity C4 other end ground connection, series connection backlight driving chip U1 second pin difference
One end of negative electrode, the first electric capacity C1 with voltage-stabiliser tube D1 and positive voltage output end VOUT+ are connected, the first electric capacity C1 another termination
Ground GND, by the first electric capacity C1 filtering, open the more stable voltage of output, series connection backlight driving chip U1 the 3rd pin
It is connected respectively with first resistor R1 one end and the 5th electric capacity C5 one end, the 5th electric capacity C5 other end ground connection, first resistor
The R1 other end is connected with pulse input end PWM, and series connection backlight drive core is quickly turned on and off by inputting pwm signal
Piece U1.When the frequency of pwm signal is higher, the pwm signal can be filtered into by the wave filter built in backlight driving chip of connecting U1
One suitable analog level, change feedback voltage and reach the purpose for changing driving current.
Connect backlight driving chip U1 the 4th pin one end with the 6th electric capacity C6 and negative voltage output end VOUT- respectively
Connection, the 6th electric capacity the C6 other end ground connection GND, series connection backlight driving chip U1 the 5th pin ground connection GND, the present embodiment
In, the 5th electric capacity C5 capacitance is 20PF, and the 6th electric capacity C6 capacitance is 15PF.
For the backlight drive circuit 5 compared with traditional backlight drive circuit, it uses less component, circuit structure compared with
To be simple, hardware cost can be so saved, therefore cost is relatively low.In addition, the 5th electric capacity C5 and the 6th electric capacity C6 are filtered electrical
Hold, for filtering clutter, therefore the safety and reliability of circuit is higher.
In the present embodiment, the backlight drive circuit 5 also includes second resistance R2, second resistance R2 one end and the second electric capacity
C2 one end connection, the second resistance R2 other end are connected with the first pin for the backlight driving chip U1 that connects, second resistance R2
Resistance be 4.7K Ω.Second resistance R2 is current-limiting resistance, between series connection backlight driving chip U1 and the second electric capacity C2
Branch road carry out overcurrent protection, so can further improve the safety and reliability of circuit.
In the present embodiment, the backlight drive circuit 5 also includes 3rd resistor R3,3rd resistor R3 one end and the first inductance
L1 other end connection, the 3rd resistor R3 other end are connected with voltage-stabiliser tube D1 anode, and 3rd resistor R3 resistance is 100
Ω.3rd resistor R3 is current-limiting resistance, for carrying out overcurrent protection to the branch road where the first inductance L1, so can more enter one
Step improves the safety and reliability of circuit.
In the present embodiment, the backlight drive circuit 5 also includes the 4th resistance R4, the 4th resistance R4 one end and backlight of connecting
Driving chip U1 the 4th pin connection, the 4th resistance R4 other end are connected with the 6th electric capacity C6 one end, the 4th resistance R4
Resistance be 20 Ω.4th resistance R4 is current-limiting resistance, for the branch where backlight driving chip U1 the 4th pin of connecting
Road carries out overcurrent protection, to further enhance the effect of current limliting.
In a word, in the present embodiment, because there is the recording instrument without paper of backlight drive to be provided with multiple interfaces for this, can connect not
Same equipment, can thus show the data of record on different devices, therefore have multiple display modes.In addition, the back of the body
The component that light drive circuit 5 uses is less, and circuit structure is relatively simple, can so save hardware cost, simultaneously as the back of the body
Current-limiting resistance and filter capacitor are provided with light drive circuit 5, therefore the safety and reliability of circuit is higher.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (5)
1. a kind of recording instrument without paper with backlight drive, it is characterised in that including master controller, SRAM video memorys chip, wireless
Communication module, display driver circuit, backlight drive circuit, key scanning circuit, USB interface, RJ45 interfaces, SATA interface, touch
Touch screen interface and display screen, the SRAM video memorys chip are connected with the master controller, the wireless communication module and the master
Controller connects, for the data of record to be sent into mobile terminal, the display driver circuit, backlight drive circuit, button
Scanning circuit, USB interface, RJ45 interfaces, SATA interface and touch screen interface are connected with the master controller, the display screen
It is connected respectively with the display driver circuit and backlight drive circuit；
The backlight drive circuit includes series connection backlight driving chip, voltage-stabiliser tube, the first electric capacity, the second electric capacity, the 3rd electric capacity, the
Four electric capacity, the 5th electric capacity, the 6th electric capacity, first resistor and the first inductance, the first pin point of the series connection backlight driving chip
One end, one end of the 3rd electric capacity, one end of the first inductance and power supply not with second electric capacity are connected, second electricity
The other end of the other end of appearance and the 3rd electric capacity is grounded, the other end of first inductance respectively with the backlight drive of connecting
One end connection of 6th pin of chip, the anode of voltage-stabiliser tube and the 4th electric capacity, the other end ground connection of the 4th electric capacity are described
The second pin negative electrode with the voltage-stabiliser tube, one end of the first electric capacity and the positive voltage output end respectively for backlight driving chip of connecting
Connection, the other end ground connection of first electric capacity, the 3rd pin of the series connection backlight driving chip are electric with described first respectively
One end of resistance connects with one end of the 5th electric capacity, the other end of the 5th electric capacity ground connection, the other end of the first resistor with
Pulse input end connects, the 4th pin one end with the 6th electric capacity and the negative voltage respectively of the series connection backlight driving chip
Output end connects, the other end ground connection of the 6th electric capacity, the 5th pin ground connection of the series connection backlight driving chip.
2. the recording instrument without paper according to claim 1 with backlight drive, it is characterised in that the backlight drive circuit
Also include second resistance, one end of the second resistance is connected with one end of second electric capacity, the second resistance it is another
The first pin with the series connection backlight driving chip is held to be connected, the resistance of the second resistance is 4.7K Ω, the 5th electricity
The capacitance of appearance is 20PF, and the capacitance of the 6th electric capacity is 15PF.
3. the recording instrument without paper according to claim 2 with backlight drive, it is characterised in that the backlight drive circuit
Also include 3rd resistor, one end of the 3rd resistor is connected with the other end of first inductance, the 3rd resistor it is another
One end is connected with the anode of the voltage-stabiliser tube, and the resistance of the 3rd resistor is 100 Ω.
4. the recording instrument without paper with backlight drive according to claims 1 to 3 any one, it is characterised in that described
Backlight drive circuit also includes the 4th resistance, one end of the 4th resistance and the 4th pin of the backlight driving chip of connecting
Connection, the other end of the 4th resistance are connected with one end of the 6th electric capacity, and the resistance of the 4th resistance is 20 Ω.
5. the recording instrument without paper with backlight drive according to claims 1 to 3 any one, it is characterised in that described
Wireless communication module is bluetooth module, WIFI module, GPRS module, Zigbee module, CDMA module or WCDMA modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720656824.3U CN206805992U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with backlight drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720656824.3U CN206805992U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with backlight drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206805992U true CN206805992U (en) | 2017-12-26 |
Family
ID=60744999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720656824.3U Expired - Fee Related CN206805992U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with backlight drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206805992U (en) |
-
2017
- 2017-06-07 CN CN201720656824.3U patent/CN206805992U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 |