CN207731626U - A kind of circuit of LCD backlight circuit - Google Patents
A kind of circuit of LCD backlight circuit Download PDFInfo
- Publication number
- CN207731626U CN207731626U CN201820018676.7U CN201820018676U CN207731626U CN 207731626 U CN207731626 U CN 207731626U CN 201820018676 U CN201820018676 U CN 201820018676U CN 207731626 U CN207731626 U CN 207731626U
- Authority
- CN
- China
- Prior art keywords
- backlight
- driving chip
- led light
- light group
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of circuits of LCD backlight circuit, including backlight driving chip, the power supply of backlight driving chip terminates input voltage, it is connect with the power output end of backlight driving chip after the power end Series power inductance, the power output end of backlight driving chip is connect with the anode of backlight LED light group, the negative terminal of backlight LED light group and the feedback end of backlight driving chip connect, and are grounded after the negative terminal resistors in series of backlight LED light group.The utility model simple structure and reasonable design can adjust brightness, while small volume, can be used in the electronic product of some small volumes.
Description
Technical field
The utility model is related to electronic technology field more particularly to a kind of circuits of LCD backlight circuit.
Background technology
With electronics, the development of the communication technology, various electronic display units emerge one after another, in some electronic products or one
During the use of a little operation panels, surrounding is usually in the environment of dark, in order to overcome the problems, such as this, it is proposed that
Backlight, the backlight circuit of current backlight tend not to adjust the brightness of backlight, and the excessively bright situation of backlight can be brought
Unnecessary power consumption, the excessively dark situation of backlight can influence to illuminate, also, the backlight circuit of existing backlight is complex,
It is bulky, it is not easily applicable to the electronic product of some small volumes.
Invention content
The utility model provides that a kind of circuit is simple, electricity of small LCD backlight circuit to solve the above-mentioned problems
Road.
The utility model is achieved through the following technical solutions in order to achieve the above object：
The utility model is a kind of circuit of LCD backlight circuit, including backlight driving chip, the power supply of backlight driving chip
Input voltage is terminated, is connect with the power output end of backlight driving chip after the power end Series power inductance, backlight drive core
The power output end of piece is connect with the anode of backlight LED light group, the negative terminal of backlight LED light group and the feedback end of backlight driving chip
It connects, is grounded after the negative terminal resistors in series of backlight LED light group.
Further improvement of the utility model is：Backlight driving chip is that only have the backlight drive core exported all the way
Piece.
Further improvement of the utility model is：It is grounded after negative terminal parallel resistance R26, R27 of backlight LED light group.
Further improvement of the utility model is：The maximum group number of LED light group in parallel is by carrying on the back in backlight LED light group
The maximum drive power decision of optical drive chip, the maximum drive work(of the general power of LED light group no more than backlight driving chip
Rate.
The utility model has the beneficial effects that：The model TPS61160 for the driving chip that the utility model uses, the back of the body
Optical drive chip is the only backlight driving chip that exports all the way, and circuit structure is simple, the maximum group number of LED light group in parallel by
The maximum drive power decision of backlight driving chip, the maximum drive of the general power of LED light group no more than backlight driving chip
Power is suitable for various sizes of LCD display.
The utility model simple structure and reasonable design can adjust brightness, while small volume, can be used in some bodies
The smaller electronic product of product.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
As shown in Figure 1, the utility model is a kind of circuit of LCD backlight circuit, it is characterised in that：Including backlight drive core
Piece, the power supply of backlight driving chip terminate input voltage, the power supply after the power end Series power inductance with backlight driving chip
Output end connects, and the power output end of backlight driving chip is connect with the anode of backlight LED light group, the negative terminal of backlight LED light group
It connect with the feedback end of backlight driving chip, is grounded after the negative terminal resistors in series of backlight LED light group, backlight driving chip is only
With the backlight driving chip exported all the way, the model TPS61160 of backlight chip, the negative terminal parallel resistance of backlight LED light group
It is grounded after R26, R27, the maximum of LED light group in parallel organizes maximum drive of the number by backlight driving chip in backlight LED light group
The general power of power decision, LED light group is suitable for various sizes of LCD no more than the maximum drive power of backlight driving chip
Display.
The utility model simple structure and reasonable design can adjust brightness, while small volume, can be used in some bodies
The smaller electronic product of product.
Claims (4)
1. a kind of circuit of LCD backlight circuit, it is characterised in that：Including backlight driving chip, the electricity of the backlight driving chip
Source connects input voltage, is connect with the power output end of the backlight driving chip after the power end Series power inductance,
The power output end of the backlight driving chip is connect with the anode of backlight LED light group, the negative terminal of the backlight LED light group and institute
The feedback end connection of backlight driving chip is stated, is grounded after the negative terminal resistors in series of the backlight LED light group.
2. a kind of circuit of LCD backlight circuit according to claim 1, it is characterised in that：The backlight driving chip is only
With the backlight driving chip exported all the way.
3. a kind of circuit of LCD backlight circuit according to claim 1, it is characterised in that：The negative terminal of the backlight LED light group
It is grounded after parallel resistance R26, R27.
4. a kind of circuit of LCD backlight circuit according to claim 1, it is characterised in that：In the backlight LED light group institute simultaneously
The maximum group number of the LED light group of connection is by the maximum drive power decision of the backlight driving chip, the general power of the LED light group
No more than the maximum drive power of backlight driving chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820018676.7U CN207731626U (en) | 2018-01-05 | 2018-01-05 | A kind of circuit of LCD backlight circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820018676.7U CN207731626U (en) | 2018-01-05 | 2018-01-05 | A kind of circuit of LCD backlight circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207731626U true CN207731626U (en) | 2018-08-14 |
Family
ID=63085162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820018676.7U Expired - Fee Related CN207731626U (en) | 2018-01-05 | 2018-01-05 | A kind of circuit of LCD backlight circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207731626U (en) |
-
2018
- 2018-01-05 CN CN201820018676.7U patent/CN207731626U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180814 Termination date: 20190105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |