CN206301577U - A kind of fiche digital read device output end display drive circuit - Google Patents
A kind of fiche digital read device output end display drive circuit Download PDFInfo
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- CN206301577U CN206301577U CN201621386177.0U CN201621386177U CN206301577U CN 206301577 U CN206301577 U CN 206301577U CN 201621386177 U CN201621386177 U CN 201621386177U CN 206301577 U CN206301577 U CN 206301577U
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- electric capacity
- resistance
- fiche
- drive circuit
- negative pole
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Abstract
The utility model discloses a kind of fiche digital read device output end display drive circuit, including power supply, resistance R24 electric capacity C50, electric capacity C53, LED-backlit driving chip, inductance L2, diode D2, resistance R25, electric capacity C51, resistance R26, diode D3, electric capacity C54 and double plug holder.The utility model can provide the screen voltage of stabilization, there is provided preferably reading experience, so as to improve the enjoyment of reading.
Description
Technical field
The utility model is related to digital read device technical field, it particularly relates to a kind of fiche digital read device
Output end display drive circuit.
Background technology
At present, fiche digital read device product is very high to the requirement of pixel cell driving voltage.In the prior art, by counting
Display screen of the driving voltage to fiche digital read device is directly provided according to line, be frequently can lead to electric initial stage pixel cell and connect
The driving voltage for receiving is less than the output voltage of data wire, i.e. pixel cell driving voltage front end missing, and voltage is along data wire
Direction can also decline from top to bottom, cause pixel cell gray scale to show inaccurate, and picture quality is poor, so as to can influence to read
The experience of reading, reduces the enjoyment read.
Utility model content
The purpose of this utility model is to provide a kind of fiche digital read device output end display drive circuit, with gram
Take currently available technology above shortcomings.
To realize above-mentioned technical purpose, what the technical solution of the utility model was realized in：
A kind of fiche digital read device output end display drive circuit, including power supply, described power supply are connected with
The first end of resistance R24, second end of described resistance R24 be connected with the positive terminal of electric capacity C50, the first end of electric capacity C53 and
The VIN pins of LED-backlit driving chip, the described negative pole end of electric capacity C50 and the first end of electric capacity C53 is connected, described LED
The EN pins of backlight driving chip are connected with the first end of inductance L2, and second end of described inductance L2 is connected with LED-backlit drive
The SW pins of dynamic chip and the positive terminal of diode D2, the negative pole end of described diode D2 be connected with second end of resistance R25,
The first end of the positive terminal of electric capacity C51, the first end of resistance R26, the negative pole end of diode D3 and electric capacity C54, described resistance
The first end of R25 and the positive terminal of diode D3 are connected with the FB pins of LED-backlit driving chip, described electric capacity C51's
The negative pole end of negative pole end, second end of electric capacity C54 with electric capacity C52 is connected, the positive terminal and resistance R26 of described electric capacity C52
The second end be connected with the positive terminals of double plug holder, the first end of described resistance R25, the positive terminal of diode D3 and
The FB pins of LED-backlit driving chip are connected with the negative terminals of double plug holder.
Further, the positive terminal of described diode D3 is also associated with the first end of resistance R23, described resistance R23
The second end ground connection.
Further, the GND pin ground connection of described LED-backlit driving chip.
Further, the negative pole end of described electric capacity C50 and second end of electric capacity C53 are grounded.
Further, the negative pole end of the negative pole end of described electric capacity C51, second end of electric capacity C54 and electric capacity C52 connects
Ground.
Further, described electric capacity C50, electric capacity C51 and electric capacity C52 are electrochemical capacitor.
Preferably, the model PJ2126SOT23-5 of described LED-backlit driving chip.
After adopting the above technical scheme, the utility model has following beneficial effect：The utility model can be provided surely
Fixed screen voltage, there is provided preferably reading experience, so as to improve the enjoyment of reading.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of structural representation of display drive circuit of the utility model embodiment.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, all other embodiment that those of ordinary skill in the art are obtained all belongs to
In the scope of the utility model protection.
As shown in figure 1, a kind of fiche digital read device output end display screen described in the utility model embodiment drives
Dynamic circuit, including power supply, described power supply are connected with the first end of resistance R24, and second end of described resistance R24 is connected with electricity
Hold the VIN pins of the positive terminal, the first end of electric capacity C53 and LED-backlit driving chip of C50, the negative pole end of described electric capacity C50
First end with electric capacity C53 is connected, and the EN pins of described LED-backlit driving chip are connected with the first end of inductance L2, described
Second end of inductance L2 be connected with the SW pins of LED-backlit driving chip and the positive terminal of diode D2, described diode
The negative pole end of D2 be connected with second end of resistance R25, the positive terminal of electric capacity C51, the first end of resistance R26, diode D3 it is negative
The first end of extreme and electric capacity C54, the described first end of resistance R25 and the positive terminal of diode D3 drives with LED-backlit
The FB pins connection of chip, the negative pole end of described electric capacity C51, second end of electric capacity C54 connect with the negative pole end of electric capacity C52
Connect, the described positive terminal of electric capacity C52 and second end of resistance R26 is connected with the positive terminals of double plug holder, described
The FB pins of the first end, the positive terminal of diode D3 and LED-backlit driving chip of resistance R25 connect with the negative of double plug holder
Line end is connected.
In one embodiment, the positive terminal of described diode D3 is also associated with the first end of resistance R23, described
The second end ground connection of resistance R23.
In one embodiment, the GND pin ground connection of described LED-backlit driving chip.
In one embodiment, the negative pole end of described electric capacity C50 and second end of electric capacity C53 are grounded.
In one embodiment, the negative pole of the negative pole end of described electric capacity C51, second end of electric capacity C54 and electric capacity C52
End is grounded.
In one embodiment, described electric capacity C50, electric capacity C51 and electric capacity C52 are electrochemical capacitor.
In one embodiment, the model PJ2126SOT23-5 of described LED-backlit driving chip.
The utility model is connected by USB interface with power supply, to provide the voltage of 5V, can be by 5V's by foregoing circuit
Voltage rises to 9.6V and is powered to LED-backlit driving chip, so as to provide the voltage of stabilization for display screen.
The utility model can provide the screen voltage of stabilization, there is provided preferably reading experience, so as to improve reading
Enjoyment.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of fiche digital read device output end display drive circuit, including power supply, it is characterised in that described electricity
Source is connected with the first end of resistance R24, and second end of described resistance R24 is connected with the positive terminal of electric capacity C50, electric capacity C53
The VIN pins of first end and LED-backlit driving chip, the described negative pole end of electric capacity C50 and the first end of electric capacity C53 is connected,
The EN pins of described LED-backlit driving chip are connected with the first end of inductance L2, and second end of described inductance L2 is connected with
The SW pins of LED-backlit driving chip and the positive terminal of diode D2, the negative pole end of described diode D2 are connected with resistance R25
The second end, the positive terminal of electric capacity C51, the first end of resistance R26, the first end of the negative pole end of diode D3 and electric capacity C54, institute
The first end of the resistance R25 for stating and the positive terminal of diode D3 are connected with the FB pins of LED-backlit driving chip, described electricity
The negative pole end with electric capacity C52 of negative pole end, second end of electric capacity C54 for holding C51 be connected, the positive terminal of described electric capacity C52 with
Second end of resistance R26 is connected with the positive terminals of double plug holder, the first end of described resistance R25, diode D3
The FB pins of positive terminal and LED-backlit driving chip are connected with the negative terminals of double plug holder.
2. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In the positive terminal of described diode D3 is also associated with the first end of resistance R23, and second end of described resistance R23 is grounded.
3. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In the GND pin of described LED-backlit driving chip is grounded.
4. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In the described negative pole end of electric capacity C50 and second end of electric capacity C53 is grounded.
5. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In the negative pole end of the described negative pole end of electric capacity C51, second end of electric capacity C54 and electric capacity C52 is grounded.
6. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In described electric capacity C50, electric capacity C51 and electric capacity C52 are electrochemical capacitor.
7. a kind of fiche digital read device output end display drive circuit according to claim 1, its feature exists
In the model PJ2126SOT23-5 of described LED-backlit driving chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621386177.0U CN206301577U (en) | 2016-12-16 | 2016-12-16 | A kind of fiche digital read device output end display drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621386177.0U CN206301577U (en) | 2016-12-16 | 2016-12-16 | A kind of fiche digital read device output end display drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206301577U true CN206301577U (en) | 2017-07-04 |
Family
ID=59213899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621386177.0U Active CN206301577U (en) | 2016-12-16 | 2016-12-16 | A kind of fiche digital read device output end display drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206301577U (en) |
-
2016
- 2016-12-16 CN CN201621386177.0U patent/CN206301577U/en active Active
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