CN202796007U - Backlight circuit and LCD module provided with same - Google Patents
Backlight circuit and LCD module provided with same Download PDFInfo
- Publication number
- CN202796007U CN202796007U CN 201220528428 CN201220528428U CN202796007U CN 202796007 U CN202796007 U CN 202796007U CN 201220528428 CN201220528428 CN 201220528428 CN 201220528428 U CN201220528428 U CN 201220528428U CN 202796007 U CN202796007 U CN 202796007U
- Authority
- CN
- China
- Prior art keywords
- backlight
- driving chip
- backlight driving
- group
- led light
- 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
Images
Abstract
The utility model relates to a backlight circuit and an LCD module provided with the same. The backlight circuit includes a backlight drive chip which only has one output path. The backlight drive chip drives multiple LED lamp groups which are connected in parallel, and single LED lamps in different LED lamp groups are arranged in a staggered way, so even the currents in paths are slightly different, the backlight unevenness caused by the LED brightness inconsistency can not happen. At the same time, the single LED lamps in different groups are arranged in the staggered way, so the current consistency of the LED lamps in each group can not be considered, and the backlight drive chip which only has one output path can be adopted, and consequently the product cost is greatly reduced.
Description
Technical field
The utility model relates to LCD module group backlight application technology, relates in particular to a kind of backlight circuit for mobile phone and the LCD module of this backlight circuit is installed.
Background technology
Along with the development of electronics, the communication technology, the application of mobile phone in people's daily life is increasingly extensive; The application technology that high definition demonstration, digital photographing, touch screen, GPS, intelligent chip etc. are leading is leading the trend of mobile phone product, has also driven the development of mobile phone industry, and various multifunction intelligent mobile telephones, panel computer mobile phone emerge in an endless stream.Therefore display screen is increasing also constantly gets consumer reception, and becomes the trend of mobile phone display screen development.
Existing mobile phone generally is to adopt LCD display (Liquid Crystal Display, liquid crystal display), and display effect and cost aspect are again the focuses that people pay close attention to.The backlight circuit of LCD module generally has two kinds at present.The first is that the similar model of employing is the backlight driving chip of TPS61151, as shown in Figure 1, this backlight electric power drives core can two paths of LED backlight group in parallel, regulates by the chip internal comparer, the current constant that keeps the two-way load realizes that the brightness of two paths of LED backlight group is consistent.Therefore adopt this kind backlight driving chip to drive the two paths of LED backlight and can realize preferably display effect.But this kind backlight driving chip is expensive, and use cost is high.
The second is that the similar model of employing is the backlight driving chip of TPS61161, as shown in Figure 2; This kind backlight electric power drives core and can only single channel export, and drives a paths of LEDs lamp group, and this backlight driving chip is cheap.But because different LED lamp internal resistances is slightly different, cause each the road electric current after the parallel connection unequal, this kind backlight driving chip can not be regulated each road electric current, so the LED lamp brightness in each paths of LEDs lamp group is inconsistent, can cause the LCD backlight module backlight inhomogeneous.
Summary of the invention
For the problems referred to above, it is a kind of cheap that the utility model provides, the backlight circuit that backlight effect the is good and LCD module of this backlight circuit is installed.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Backlight circuit, comprise backlight driving chip, be connected with the feedback end of described backlight driving chip after the dc voltage output end series connection backlight LED light group of this backlight driving chip, it is characterized in that, described backlight driving chip is to only have the backlight driving chip of one tunnel output, described backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
The model of described backlight driving chip is TPS61161, the power supply termination input voltage of this backlight driving chip, this power end is also connected and is connected with the power output end of described backlight driving chip behind the power inductance, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end of described backlight driving chip, and the negative terminal of described backlight LED light group is ground connection behind the resistors in series also.
A kind of LCD module, comprise and laminate successively the face glass that is installed together, flexible PCB, the backlight circuit plate, light guiding film, light guide plate and plastics support backlight, on the described backlight circuit plate backlight circuit is installed, this backlight circuit comprises backlight driving chip, be connected with the feedback end of described backlight driving chip after the dc voltage output end series connection backlight LED light group of this backlight driving chip, it is characterized in that, described backlight driving chip is to only have the backlight driving chip of one tunnel output, described backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
The model of described backlight driving chip is TPS61161, the power supply termination input voltage of this backlight driving chip, this power end is also connected and is connected with the power output end of described backlight driving chip behind the power inductance, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end of described backlight driving chip, and the negative terminal of described backlight LED light group is ground connection behind the resistors in series also.
Good effect of the present utility model:
Backlight driving chip in the backlight circuit of the present utility model drives the LED lamp group of some groups of parallel connections, single led lamp in the different LED lamp group is alternative arrangement all, even each road electric current is slightly variant, can not cause because inconsistent cause backlight inhomogeneous of LED luminosity on each road yet.Simultaneously owing to adopt not on the same group single led lamp mode of alternative arrangement all, need not to consider respectively to organize the electric current consistance of LED lamp, adopt simultaneously common single channel output backlight driving chip get final product, so greatly reduce the cost of product.
Backlight circuit of the present utility model is applied to the LCD module of backlight circuit of mobile phone, so that in the LCD display even back of mobile phone, and has significantly reduced the production cost of mobile phone, has good application value.
Description of drawings
Fig. 1 is backlight driving chip and the peripheral circuit thereof of existing two-way load backlight;
Fig. 2 is backlight driving chip and the peripheral circuit thereof of existing one tunnel load backlight;
Fig. 3 is backlight circuit figure of the present utility model;
Fig. 4 is LCD module of the present utility model;
Fig. 5 is the different LED lamp alternative arrangement structural representation of two-way in two groups of LED lamp groups that are installed on the backlight circuit plate of LCD module.
Embodiment
Below in conjunction with specific embodiment the utility model is described in further detail.
As shown in Figure 3, backlight circuit comprises backlight driving chip, and the model of this backlight driving chip is TPS61161, and this backlight driving chip is to only have the backlight driving chip of one tunnel output.The power supply termination input voltage of backlight driving chip, this power end is also connected and is connected with the power output end of described backlight driving chip behind the power inductance L, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end FB of described backlight driving chip, and the negative terminal of described backlight LED light group is ground connection behind the resistors in series R also.The backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
Backlight circuit of the present utility model drives the LED lamp group of some groups of parallel connections, and the alternative arrangement all of the single led lamp on the same group even each road electric current is slightly variant, can not cause because inconsistent cause backlight inhomogeneous of LED luminosity on each road yet.Simultaneously owing to adopt not on the same group single led lamp mode of alternative arrangement all, need not to consider respectively to organize the electric current consistance of LED lamp, adopt simultaneously common single channel output backlight driving chip get final product, so greatly reduce the cost of product.
The maximum group number of LED lamp group in parallel is by the maximum drive power decision of backlight driving chip, and the general power of LED lamp group can not surpass the maximum drive power of backlight driving chip, is suitable for the LCD display of different size.
As shown in Figure 4, the LCD module of above-mentioned backlight circuit is installed, this LCD module is installed on the equipment such as mobile phone, panel computer.It comprises and laminates successively the face glass 1 that is installed together, flexible PCB 2, backlight circuit plate 3, light guiding film 4, light guide plate 5 and plastics support 6 backlight, on the described backlight circuit plate 3 backlight circuit is installed, this backlight circuit comprises backlight driving chip, this backlight driving chip is to only have the backlight driving chip of one tunnel output, be connected with the feedback end FB of described backlight driving chip after the dc voltage output end series connection backlight LED light group of this backlight driving chip, this backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
The model of this backlight driving chip is TPS61161, the power supply termination input voltage of this backlight driving chip, this power end is also connected and is connected with the power output end of backlight driving chip behind the power inductance L, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end FB of backlight driving chip, and the negative terminal of backlight LED light group is ground connection behind the resistors in series also.
Backlight circuit of the present utility model is applied to the LCD module of backlight circuit of mobile phone, so that the LCD display even back of mobile phone, and has significantly reduced the production cost of mobile phone, has good application value.
Backlight circuit of the present utility model is not limited to be applied on the LCD of mobile phone display simultaneously, can also be applied on the LCD display of the equipment such as panel computer.
As shown in Figure 5, the structural representation of two groups of LED lamp groups of installing on the backlight circuit plate 3, LED1 to LED4 is one group, LED5 to LED8 is one group.LED lamp number in every group is all identical.Two groups LED lamp successively alternative arrangement on the same straight line.When reality was used, each organizes the number of LED lamp might not be consistent, be according to the demand flexible choice backlight of LCD module.Simultaneously the LED lamp also not necessarily is arranged into straight line, also can be arranged into according to the requirement of the shape of LCD and demonstration thereof other shape, such as: camber line, curve etc.
Above-described embodiment of the present utility model only is to be explanation the utility model example, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make on the basis of the above description other multi-form variation and changes.Here can't give all embodiments exhaustive.Everyly belong to the row that apparent variation that the technical solution of the utility model amplifies out or change still are in protection domain of the present utility model.
Claims (4)
1. backlight circuit, comprise backlight driving chip, be connected with the feedback end of described backlight driving chip after the dc voltage output end series connection backlight LED light group of this backlight driving chip, it is characterized in that, described backlight driving chip is to only have the backlight driving chip of one tunnel output, described backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
2. described backlight circuit according to claim 1, it is characterized in that, the model of described backlight driving chip is TPS61161, the power supply termination input voltage of this backlight driving chip, this power end is also connected, and power inductance (L) is rear to be connected with the power output end of described backlight driving chip, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end of described backlight driving chip, and the negative terminal of described backlight LED light group is the rear ground connection of resistors in series (R) also.
3. LCD module, comprise and laminate successively the face glass (1) that is installed together, flexible PCB (2), backlight circuit plate (3), light guiding film (4), light guide plate (5) and plastics support backlight (6), on the described backlight circuit plate (3) backlight circuit is installed, this backlight circuit comprises backlight driving chip, be connected with the feedback end of described backlight driving chip after the dc voltage output end series connection backlight LED light group of this backlight driving chip, it is characterized in that, described backlight driving chip is to only have the backlight driving chip of one tunnel output, described backlight LED light group is the LED lamp group of at least two group parallel connections, and each the LED lamp in the different LED lamp group is alternative arrangement successively all.
4. described LCD module according to claim 3, it is characterized in that, the model of described backlight driving chip is TPS61161, the power supply termination input voltage of this backlight driving chip, this power end is also connected, and power inductance (L) is rear to be connected with the power output end of described backlight driving chip, the power output end of this backlight driving chip is connected with the anode of described backlight LED light group, the negative terminal of this backlight LED light group is connected with the feedback end of described backlight driving chip, and the negative terminal of described backlight LED light group is the rear ground connection of resistors in series (R) also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528428 CN202796007U (en) | 2012-10-16 | 2012-10-16 | Backlight circuit and LCD module provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528428 CN202796007U (en) | 2012-10-16 | 2012-10-16 | Backlight circuit and LCD module provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796007U true CN202796007U (en) | 2013-03-13 |
Family
ID=47823220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528428 Expired - Fee Related CN202796007U (en) | 2012-10-16 | 2012-10-16 | Backlight circuit and LCD module provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202796007U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768271A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Automatic dimming LED constant-current driving circuit |
| CN105999548A (en) * | 2016-07-04 | 2016-10-12 | 上海健康医学院 | Transcutaneous nerve location electrical stimulation pen |
| CN112669778A (en) * | 2019-10-31 | 2021-04-16 | 华为技术有限公司 | Backlight control circuit, control method thereof and display terminal |
| CN114170971A (en) * | 2021-11-05 | 2022-03-11 | 惠州Tcl移动通信有限公司 | Filtering backlight circuit and mobile terminal |
-
2012
- 2012-10-16 CN CN 201220528428 patent/CN202796007U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768271A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Automatic dimming LED constant-current driving circuit |
| CN104768271B (en) * | 2014-01-02 | 2019-10-25 | 深圳市海洋王照明工程有限公司 | Constant current driver circuit for LED with an automatic light meter |
| CN105999548A (en) * | 2016-07-04 | 2016-10-12 | 上海健康医学院 | Transcutaneous nerve location electrical stimulation pen |
| CN105999548B (en) * | 2016-07-04 | 2024-03-29 | 上海健康医学院 | Percutaneous nerve positioning electric stimulation pen |
| CN112669778A (en) * | 2019-10-31 | 2021-04-16 | 华为技术有限公司 | Backlight control circuit, control method thereof and display terminal |
| CN114170971A (en) * | 2021-11-05 | 2022-03-11 | 惠州Tcl移动通信有限公司 | Filtering backlight circuit and mobile terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102238768B (en) | Light-emitting diode (LED) backlight source driving module | |
| US20120019490A1 (en) | Modular led display structure with connecting edge banding to connect each other | |
| CN103280203B (en) | LED backlight drive circuit, liquid crystal indicator and a kind of driving method | |
| CN202796007U (en) | Backlight circuit and LCD module provided with same | |
| CN102543011A (en) | Liquid crystal backlight drive system with adjustable brightness | |
| CN101329850B (en) | LCD device | |
| US20140016304A1 (en) | Led backlight driving circuit, backlight module, and lcd device | |
| CN102103831A (en) | Light emitting diode (LED) backlight driving circuit | |
| CN101802686A (en) | Lighting device | |
| CN102354483B (en) | LED (Light Emitting Diode) backlight-source boosting driving circuit, LED backlight source and liquid crystal display device | |
| CN102982771B (en) | A kind of backlight drive circuit and liquid crystal display | |
| CN102665328B (en) | Driving circuit and display device applied to same for a backlight module | |
| CN101950541B (en) | Backlight module and liquid crystal display | |
| CN101165567A (en) | Backlight system and liquid crystal display | |
| CN102750911B (en) | A kind of LED backlight drive circuit, backlight module and liquid crystal indicator | |
| CN202058427U (en) | Liquid crystal backlight driving system | |
| US20070064416A1 (en) | Light emitting diode flexible printed circuit having a switching unit for switching between a series mode and a parallel mode | |
| CN101031176B (en) | Light-source driver | |
| CN101909378A (en) | LED driving device and method | |
| US20130271500A1 (en) | LED Backlight Driving Circuit, Backlight Module, and LCD Device | |
| CN203337955U (en) | Multi-color-zone LED liquid crystal module | |
| CN201489798U (en) | Display device capable of improving optical uniformity and current sharing circuit | |
| CN100562911C (en) | LED drive and use its display device | |
| CN203336370U (en) | Multi-color-zone color changeable LED backlight product | |
| CN104602396A (en) | WLED (White Light Emitting Diode) driver and driving control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20151016 |
|
| EXPY | Termination of patent right or utility model |