CN208208305U - A kind of backlight driving system and adjustable partial pressure protective module - Google Patents
A kind of backlight driving system and adjustable partial pressure protective module Download PDFInfo
- Publication number
- CN208208305U CN208208305U CN201721764915.5U CN201721764915U CN208208305U CN 208208305 U CN208208305 U CN 208208305U CN 201721764915 U CN201721764915 U CN 201721764915U CN 208208305 U CN208208305 U CN 208208305U
- Authority
- CN
- China
- Prior art keywords
- module
- backlight
- partial pressure
- driving
- driving system
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to backlight drive fields, and in particular to a kind of backlight driving system and adjustable partial pressure protective module.A kind of backlight driving system; including sequentially connected driving boost module, adjustable partial pressure protective module and backlight module; the adjustable partial pressure protective module includes that a resistance value adjusts circuit, and the resistance value adjusts the input voltage value that the sum of the maximum partial pressure value of circuit and the operating voltage value of backlight module are greater than driving boost module.The utility model between driving boost module and backlight module by being arranged adjustable partial pressure protective module; improve the output end voltage value of driving boost module; avoid the output end voltage value of driving boost module lower than the input terminal voltage value of driving boost module; to guarantee to boost, IC is worked normally; loss is reduced, testing efficiency is improved.
Description
Technical field
The utility model relates to backlight drive fields, and in particular to a kind of backlight driving system and adjustable partial pressure protect mould
Block.
Background technique
In some common small size display modules, due to the limitation of backlight size and cost, allow using LED light
Limited amount, in order to reach the brightness requirement of client, the scheme of several single LED lamp parallel connections is commonly used in backlight module, specifically
With reference to Fig. 1.
Common LED light normal drive voltage is 2.8~3.3V, electric current 20mA；Single lamp parallel drive voltage is constant,
So total driving voltage VF=2.8~3.3V, IF=20mA*LED number of electric current.DC/DC booster circuit is common at present
For driving the circuit of backlight module, it is built in test fixture or driving plate, DC/DC circuit is by a boosting IC and periphery
Circuit composition, the principle that booster circuit works normally is ensuring that output voltage Vout is greater than input voltage vin, for example, generally
Input voltage vin=5V of boosting IC, it is ensured that circuit is normal, must meet Vout > 5V.
So when testing the backlight module of single LED lamp parallel connection with this jig and driving plate, due to Vout < 5V,
Lead to IC irregular working of boosting, the phenomenon that jig or backlight module are burnt out often occurs, what strong influence was tested
Efficiency and yield.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of backlight drive
Dynamic system, the phenomenon that avoiding jig or backlight module from burning out.
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of based on back
The adjustable partial pressure protective module of optical drive system, the phenomenon that avoiding jig or backlight module from burning out.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of backlight driving system is provided, including
Sequentially connected driving boost module, adjustable partial pressure protective module and backlight module, the adjustable partial pressure protective module include one
Resistance value adjusts circuit, and the resistance value adjusts the sum of the maximum partial pressure value of circuit and the operating voltage value of backlight module and is greater than driving liter
The input voltage value of die block.
Wherein, preferred version is: it includes electrode input end and cathode output end that the resistance value, which adjusts circuit, and setting exists
Between electrode input end and cathode output end and the fixed resistance and rheostat that are arranged in parallel.
Wherein, preferred version is: the backlight module includes the plurality of LEDs lamp being arranged in parallel, input terminal in parallel and resistance
Value adjusts the cathode output end connection of circuit, and parallel outputs are connect with the negative input that resistance value adjusts circuit.
Wherein, preferred version is: the driving boost module includes boosting IC, and the boosting IC is electric by the work after boosting
Stream is input in backlight module by adjustable partial pressure protective module.
Wherein, preferred version is: the boosting IC is DC-DC boosting IC.
Wherein, preferred version is: the adjustable partial pressure protective module and driving boost module are integrally disposed upon same circuit
On plate.
Wherein, preferred version is: the backlight module and driving boost module are integrally disposed upon on same circuit board.
The technical scheme adopted by the utility model to solve the technical problem is as follows: providing a kind of based on backlight driving system
Adjustable partial pressure protective module, backlight driving system include driving boost module and backlight module, the adjustable partial pressure protective module
Circuit is adjusted including resistance value, the resistance value adjusts the sum of the maximum partial pressure value of circuit and the operating voltage value of backlight module and is greater than drive
The input voltage value of dynamic boost module.
Wherein, preferred version is: it includes electrode input end and cathode output end that the resistance value, which adjusts circuit, and setting exists
Between electrode input end and cathode output end and the fixed resistance and rheostat that are arranged in parallel.
The beneficial effects of the utility model are that compared with prior art, the utility model passes through in driving boost module
Adjustable partial pressure protective module is set between backlight module, improves the output end voltage value of driving boost module, driving is avoided to rise
The output end voltage value of die block is dropped lower than the input terminal voltage value of driving boost module to guarantee IC normal work of boosting
Low-loss improves testing efficiency.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structural schematic diagram of prior art backlight module；
Fig. 2 is the structural schematic diagram of the utility model backlight driving system；
Fig. 3 is the circuit diagram of the utility model backlight driving system.
Specific embodiment
Now in conjunction with attached drawing, elaborate to the preferred embodiment of the utility model.
As shown in Figures 2 and 3, the utility model provides a kind of preferred embodiment of backlight driving system.
A kind of backlight driving system, including sequentially connected driving boost module 20, adjustable partial pressure protective module 10 and back
Optical module 30, the adjustable partial pressure protective module 10 include that a resistance value adjusts circuit, and the resistance value adjusts the maximum partial pressure of circuit
The sum of value and the operating voltage value of backlight module 30 are greater than the input voltage value of driving boost module 20.
Wherein, driving boost module 20 boosts input voltage, and is that backlight module 30 supplies by the electric energy after boosting
Electricity, driving backlight module 30 work；And due to being built in test fixture or driving plate, also, using more in parallel
The operating voltage of the backlight module 30 of LED light is often below the voltage after driving boost module boosting, directly by test fixture or
Person's driving plate is connect with backlight module 30, is easy to burn out test fixture or driving plate.
And branch pressure voltage value is arranged by adjustable partial pressure protective module 10, improve the output electricity of driving boost module 20
Pressure value avoids the phenomenon that driving boost module 20 or backlight module 30 to burn out.Preferably, the backlight that driving boost module 20 exports
Electric current generates voltage by adjustable partial pressure protective module 10, then flows to backlight module 30, forms complete loops.
In the present embodiment, and Fig. 3 is referred to, it includes electrode input end and cathode output end that the resistance value, which adjusts circuit, with
And the fixed resistance and rheostat between electrode input end and cathode output end and being arranged in parallel are set.
Specifically, fixed resistance R1, rheostat R2, the parallel resistance value R of the two are 1/ { (1/R1)+(1/R2) },
That is (R1R2)/(R1+R2).By the resistance value of standardsizing rheostat, the resistance value that resistance value adjusts circuit is adjusted, further adjusting can
Adjust the branch pressure voltage value of partial pressure protective module 10.
And since the electric current I1 that driving boost module 20 exports is constant, the branch pressure voltage of adjustable partial pressure protective module 10
V1 value is I1* (R1R2)/(R1+R2), and the voltage value of backlight module 30 is fixed value V2, drives the input electricity of boost module 20
Pressure value V3 < V1+V2 can protect backlight driving system, reduce jig loss, improve testing efficiency.
In the present embodiment, the backlight module 30 includes the plurality of LEDs lamp being arranged in parallel, input terminal in parallel and resistance value
The cathode output end connection of circuit is adjusted, parallel outputs are connect with the negative input that resistance value adjusts circuit.
Wherein, the electric current I2 of backlight module 30 is equal to the sum of the current value I21 of each LED lamp.
In the present embodiment, the driving boost module 20 includes boosting IC, and the boosting IC is electric by the work after boosting
Stream is input in backlight module 30 by adjustable partial pressure protective module 10.
Preferably, the boosting IC is DC-DC boosting IC.
In the present embodiment, the adjustable partial pressure protective module 10 is integrally disposed upon same circuit with driving boost module 20
On plate.
Alternatively, the backlight module 30 is integrally disposed upon on same circuit board with driving boost module 20.
In the present invention, a kind of preferable implementation of adjustable partial pressure protective module based on backlight driving system is provided
Example.
Backlight driving system includes driving boost module and backlight module, the adjustable partial pressure protective module include resistance value tune
Economize on electricity road, the resistance value adjust the sum of maximum partial pressure value of circuit and the operating voltage value of backlight module and are greater than driving boost module
Input voltage value.
Preferably, it includes electrode input end and cathode output end that the resistance value, which adjusts circuit, and setting is inputted in anode
Hold the fixed resistance and rheostat between cathode output end and being arranged in parallel.
As described above, only the best embodiment of the utility model is not intended to limit the scope of the utility model,
All equivalent change or modifications made according to the patent scope of the utility model are all that the utility model is covered.
Claims (9)
1. a kind of backlight driving system, it is characterised in that: including sequentially connected driving boost module, adjustable partial pressure protective module
And backlight module, the adjustable partial pressure protective module include that a resistance value adjusts circuit, the resistance value adjusts the maximum partial pressure of circuit
The sum of value and the operating voltage value of backlight module are greater than the input voltage value of driving boost module.
2. backlight driving system according to claim 1, it is characterised in that: it includes anode input that the resistance value, which adjusts circuit,
End and cathode output end, and the fixed resistance between electrode input end and cathode output end and being arranged in parallel and variable resistance are set
Device.
3. backlight driving system according to claim 2, it is characterised in that: the backlight module include be arranged in parallel it is more
LED lamp, input terminal in parallel are connect with the cathode output end that resistance value adjusts circuit, and parallel outputs and resistance value adjust circuit
Negative input connection.
4. backlight driving system according to claim 3, it is characterised in that: the driving boost module includes boosting IC,
Operating current after boosting is input in backlight module by the boosting IC by adjustable partial pressure protective module.
5. backlight driving system according to claim 4, it is characterised in that: the boosting IC is DC-DC boosting IC.
6. backlight driving system according to any one of claims 1 to 5, it is characterised in that: the adjustable partial pressure protective module
It is integrally disposed upon on same circuit board with driving boost module.
7. backlight driving system according to any one of claims 1 to 5, it is characterised in that: the backlight module and driving rise
Die block is integrally disposed upon on same circuit board.
8. a kind of adjustable partial pressure protective module based on backlight driving system, backlight driving system includes driving boost module and back
Optical module, it is characterised in that: the adjustable partial pressure protective module includes that resistance value adjusts circuit, and the resistance value adjusts the maximum of circuit
The sum of partial pressure value and the operating voltage value of backlight module are greater than the input voltage value of driving boost module.
9. adjustable partial pressure protective module according to claim 8, it is characterised in that: it includes anode that the resistance value, which adjusts circuit,
Input terminal and cathode output end, and be arranged in the fixed resistance that between electrode input end and cathode output end and is arranged in parallel and
Rheostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721764915.5U CN208208305U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight driving system and adjustable partial pressure protective module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721764915.5U CN208208305U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight driving system and adjustable partial pressure protective module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208208305U true CN208208305U (en) | 2018-12-07 |
Family
ID=64490020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721764915.5U Active CN208208305U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight driving system and adjustable partial pressure protective module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208208305U (en) |
-
2017
- 2017-12-14 CN CN201721764915.5U patent/CN208208305U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102243854B (en) | LED (light emitting diode) backlight driving method, liquid crystal display device and LED backlight driving circuit | |
| CN103037597B (en) | Multi-channel LED (Light Emitting Diode) constant current control circuit and LED light source control system | |
| CN102711316B (en) | LED backlight source drive device and liquid crystal display device utilizing same | |
| CN106101591B (en) | The method of adjustment of LCD TV and its backlight driving voltage, device | |
| CN201550321U (en) | LED driving control device | |
| CN110149747A (en) | The driving circuit and design method of LED lamp tube are directly supplied electricity to power supply adaptor | |
| KR20160019933A (en) | Led backlight driving circuit and liquid crystal display | |
| CN103218976A (en) | Light-emitting diode (LED) backlight driving circuit, LED backlight and liquid crystal display | |
| CN107317481B (en) | Multi-stage DC-DC converter, power supply device and display equipment | |
| CN207625849U (en) | Constant-current backlight circuit and display screen | |
| CN104185347A (en) | Adjustable light source system used for color selector and light source brightness adjusting method thereof | |
| CN106572565A (en) | Two-in-one power supply | |
| CN101896027A (en) | Method and circuit for controlling multi-path current distribution of LED power supply | |
| CN104240651B (en) | LED backlight and liquid crystal display for liquid crystal display | |
| CN205160851U (en) | Two unification powers | |
| CN202268152U (en) | Backlight constant-current and constant-voltage driving circuit for display screen | |
| CN102032458A (en) | Light-emitting device and light-emitting method thereof | |
| CN208208305U (en) | A kind of backlight driving system and adjustable partial pressure protective module | |
| CN102376273A (en) | LED (Light Emitting Diode) backlight driving device | |
| CN102665347A (en) | Highly-efficient drive circuit of light emitting diode (LED) Light Bars | |
| CN102779486A (en) | LED (Light-Emitting Diode) driving circuit capable of regulating current balance by negative voltage | |
| CN202713737U (en) | LED (Light Emitting Diode) driving circuit capable of regulating current balance by negative voltage | |
| CN104079186B (en) | Visible light communication power supply system | |
| CN102802304A (en) | Novel low-cost multi-group constant current output circuit of LED (Light Emitting Diode) lighting power supply | |
| CN109862292A (en) | A kind of constant-current control circuit and television set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |