CN103474035B - A kind of backlight module for liquid crystal indicator and control method thereof - Google Patents
A kind of backlight module for liquid crystal indicator and control method thereof Download PDFInfo
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- CN103474035B CN103474035B CN201310428962.2A CN201310428962A CN103474035B CN 103474035 B CN103474035 B CN 103474035B CN 201310428962 A CN201310428962 A CN 201310428962A CN 103474035 B CN103474035 B CN 103474035B
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- light source
- backlight module
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
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- Liquid Crystal Display Device Control (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of backlight module for liquid crystal indicator and control method thereof, wherein this backlight module comprises luminescence unit and for providing the power supply of electric energy for described luminescence unit, described luminescence unit comprises the multiple light source, the multiple switch corresponding with described multiple light source and the controller for controlling each described switch on and off that are arranged in parallel; Each described light source is all electrically connected by a corresponding described switch and described power supply, and described multiple switch is all electrically connected with described controller; When opening described backlight module, described controller selects one in multiple switch described in conducting according to the following steps, adopts backlight module provided by the invention and control method thereof can improve the serviceable life of backlight module to open the light source of answering with the described Switch Controller of conducting.
Description
Technical field
The present invention relates to a kind of backlight module field of liquid crystal indicator, particularly relating to a kind of backlight module for improving liquid crystal indicator serviceable life and control method thereof.
Background technology
At present, LCD TV enters huge numbers of families, is greatly favored by consumers because of its feature such as light, thin, lucuriant in design.But the life-span of the display screen of LCD TV is still the key factor determining LCD TV quality, and the life-span how extending TV display screen is a great problem of current television manufacturer.There are two main influence factors in the display screen life-span, the aging speed of first display screen; It two is life-spans of backlight lamp tube.The life-span of the backlight lamp tube of existing LCD TV is about 50,000 hours.But general televisor because the aging of back light causes the problem occurring colour cast, thus affects viewing effect after using 6 to 7 years, reduces the actual life of LCDs, reduces the quality of LCD TV.
Therefore, be badly in need of providing a kind of backlight module that can extend LCD TV serviceable life.
Summary of the invention
The object of the invention is to, for the defect that the serviceable life of TV display screen in prior art is short, provide a kind of backlight module and the control method thereof that can extend the serviceable life of liquid crystal indicator.
A kind of backlight module for liquid crystal indicator provided by the invention, comprise luminescence unit and for providing the power supply of electric energy for described luminescence unit, described luminescence unit comprises the multiple light source, the multiple switch corresponding with described multiple light source and the controller for controlling each described switch on and off that are arranged in parallel; Each described light source is all electrically connected by a corresponding described switch and described power supply, and described multiple switch is all electrically connected with described controller; When opening described backlight module, described controller selects one in multiple switch described in conducting according to the following steps, to open the light source of answering with the described Switch Controller of conducting:
S1, be numbered successively described multiple light source, the numbering of described multiple light source is respectively 1,2 ... n;
The numbering i of the light source used when once opening backlight module before S2, reading, wherein i is any one numerical value in 1 to n;
Whether S3, inspection the i-th+1 light source can normally work; If described the i-th+1 light source can normally work, then perform step S4; If described the i-th+1 light source cisco unity malfunction, then perform step S5;
S4, enable described the i-th+1 light source and the value of recorded i is added 1;
S5, the value of i is added 1, then return step S3 and continue to perform, until detect the light source that can normally work.
In above-mentioned backlight module, described each light source comprises multiple backlight be arranged in parallel.
In above-mentioned backlight module, the register of the numbering of the light source used when described backlight module also comprises for once opening backlight backlight module before recording.
In above-mentioned backlight module, described backlight module also comprises current value for detecting described each light source to judge the ammeter whether light source detected can normally work.
In above-mentioned backlight module, described backlight module also comprises the alarm device for sending alarm when the described light source cisco unity malfunction detected.
The control method of the backlight module for liquid crystal indicator provided by the invention, comprises the following steps:
S1, provide a kind of backlight module of liquid crystal indicator, described backlight module comprises multiple light source, the multiple switch be electrically connected respectively with described light source respectively and the controller for controlling described multiple switch on and off; Be numbered successively described multiple light source, the numbering of described multiple light source is respectively 1,2 ... n;
The numbering i of the light source used when once opening backlight module before S2, reading, wherein i is any one numerical value in 1 to n;
Whether S3, inspection the i-th+1 light source can normally work; If described the i-th+1 light source can normally work, then perform step S4; If described the i-th+1 light source cisco unity malfunction, then perform step S5;
S4, enable described the i-th+1 light source and recorded i value is added 1;
S5, the value of i is added 1, then return step S3 and continue to perform, until detect the light source that can normally work.
In above-mentioned control method, described step S3 comprises:
Pre-set current threshold;
Detect the current value of described the i-th+1 light source;
When the current value of described the i-th+1 light source detected exceedes described current threshold, described the i-th+1 light source can normally work; When the current value of described the i-th+1 light source detected is less than described current threshold, described the i-th+1 light source then cisco unity malfunction.
In above-mentioned control method, when the described light source cisco unity malfunction detected, send alarm.
In above-mentioned control method, when the value of i is n, returns detection the 1st light source and whether normally work.
Implement beneficial effect of the present invention to be: organize back light by arranging, then allocated each light source used by controller, when making to open backlight module, the light source enabled is all not identical at every turn more.Like this, the multiple light sources in backlight module use in turn, and each light source can avoid the accelerated deterioration caused because of long-time excessively use, thus improves the serviceable life of backlight module, reduces the risk of the colour cast caused because backlight module is aging.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the backlight module for liquid crystal indicator provided by the invention;
Fig. 2 is the workflow diagram of the control method of the backlight module for liquid crystal indicator provided by the invention.
Embodiment
The backlight module of liquid crystal indicator provided by the invention is applicable to liquid crystal display.The present invention is by increasing multiple light source to back light, then allocated by the use of controller to light source, thus the different light source that can call when making to open backlight module is to reduce the frequency of utilization of each light source at every turn, thus improve the serviceable life of light source, and then the serviceable life of backlight module is improved, further increase the serviceable life of liquid crystal indicator.
With reference to figure 1, backlight module provided by the invention comprises luminescence unit 10, provides the power supply 20 of electric energy for luminescence unit 10.Described luminescence unit 10 comprise multiple be arranged in parallel light source 110, be connected between multiple light source 110 and power supply 20 for controlling multiple switches 30 that multiple light source 110 opens and closes and the controller 40 that is electrically connected with described multiple switch 30.Controller 40 is for controlling the break-make of each switch 30.In the present embodiment, each light source 110 is electrically connected with power supply 20 by the switch 30 corresponding with it, and the switch 30 of each light source 110 and correspondence thereof forms independently current supply circuit with power supply 20, and that is, each light source 110 is in parallel each other.Each light source 110 is made up of multiple backlight 1111 parallel with one another, and this backlight is preferably backlight LED light.When opening backlight module, controller 40 is pressed the pre-arranged procedure and is selected conducting switch 30, thus opens the light source 110 corresponding with this switch 30.Only depict 2 light sources 110 in Fig. 1, be understandable that, also can set gradually multiple light source 110.
The register 50 of the numbering of the light source that this backlight module uses when also comprising for once opening backlight backlight module before recording, for the current value that detects described each light source 110 to judge the ammeter 60 whether light source detected can normally work and the alarm device 70 for sending alarm when the light source cisco unity malfunction of described detection.Register 50, ammeter 60 and alarm device 70 are all electrically connected with controller 40, control its work by controller 40.Meanwhile, the current value of the light source 110 detected is reported to controller 40 by register 50 is recorded light source 110 open record, ammeter 60.
With reference to figure 2, the control method of backlight module provided by the invention, specifically comprises the following steps:
S1, controller 40 are numbered successively to multiple light source 110, and light source is labeled as 1,2,3 respectively ... n, simultaneously by multiple with light source 110 switch 30 also number consecutively one to one, be labeled as 1a, 2a, 3a ... .na, by light source 110 and be all stored in controller 40 with the numbering of its switch 30 one to one; When using backlight module first, controller 40 by the number record of the numbering of used light source 110 and the switch 30 of its correspondence in register 50.
When S2, unlatching backlight module, controller 40 reads the numbering i of the light source 110 used when last backlight module is opened from register 50, and i is any one numerical value in 1 to n, and the numbering ia of the switch 30 of its correspondence, ia are any one numerical value in 1a to na;
S3, controller 40 detect the i-th+1 light source 110, judge whether it can normally work.Particularly, in controller 40, a current threshold is preset; (i+1) a switch 30 that controller 40 controls the i-th+1 light source 110 correspondence closes thus the i-th+1 light source 110 is energized.Controller 40 sends instruction, controls the current value of ammeter 60 to the i-th+1 light source 110 two ends and detects, and obtain the current value detected.The current value of acquisition and the current threshold of setting are compared, if the current value obtained is greater than the current threshold of setting, then determine that the i-th+1 light source 110 can normally work, if when the current value obtained is less than the current threshold of setting, then judge the i-th+1 light source 110 cisco unity malfunction.When the i-th+1 light source 110 can normally work, perform step S4; When the i-th+1 light source 110 cisco unity malfunction, then perform step S5.When the i-th+1 light source 110 cisco unity malfunction, controller 40 controls alarm device 70 and sends alarm, is convenient to user and finds this fault early and get rid of this fault.In other examples, can certainly be pass through luminous prompting.
S4, controller 40 control (i+1) a switch conduction of the i-th+1 light source 110 correspondence thus open the i-th+1 light source 110, simultaneously by the numbering of light source 110 of opening and the number record of the switch 30 of its correspondence in register 50, namely the i value of record is added 1 by register 50.
S5, the value of i is added 1, then return step S3, continue to detect remaining light source 110, until detect the light source 110 that can normally work.When the light source 110 detected be last and i=n time, then controller 40 starts again to detect from the 1st light source, and returns step S3, continues execution.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. the backlight module for liquid crystal indicator, comprise luminescence unit and for providing the power supply of electric energy for described luminescence unit, it is characterized in that, described luminescence unit comprises the multiple light source, the multiple switch corresponding with described multiple light source and the controller for controlling each described switch on and off that are arranged in parallel; Each described light source is all electrically connected by a corresponding described switch and described power supply, and described multiple switch is all electrically connected with described controller; When opening described backlight module, described controller selects one in multiple switch described in conducting according to the following steps, to open the light source of answering with the described Switch Controller of conducting:
S1, be numbered successively described multiple light source, the numbering of described multiple light source is respectively 1,2 ... n;
The numbering i of the light source used when once opening backlight module before S2, reading, wherein i is any one numerical value in 1 to n;
Whether S3, inspection the i-th+1 light source can normally work; If described the i-th+1 light source can normally work, then perform step S4; If described the i-th+1 light source cisco unity malfunction, then perform step S5;
S4, enable described the i-th+1 light source and the value of recorded i is added 1;
S5, the value of i is added 1, then return step S3 and continue to perform, until detect the light source that can normally work;
The register of the numbering of the light source that described backlight module uses when also comprising for once opening backlight module before recording;
Described backlight module also comprises current value for detecting described each light source to judge the ammeter whether light source of described detection can normally work;
Described each light source comprises multiple backlight be arranged in parallel;
Described backlight module also comprises the alarm device for sending alarm when the light source cisco unity malfunction of described detection;
Described step S3 comprises: pre-set current threshold; Detect the current value of described the i-th+1 light source; When the current value of described the i-th+1 light source detected exceedes described current threshold, described the i-th+1 light source can normally work; When the current value of described the i-th+1 light source detected is less than described current threshold, described the i-th+1 light source then cisco unity malfunction;
Described step S4 comprises: control switch conduction corresponding to the i-th+1 light source thus open the i-th+1 light source, simultaneously by the number record of the numbering of light source of opening and the switch of its correspondence in described register;
When the value of i is n, returns detection the 1st light source and whether normally work.
2. for a control method for the backlight module of liquid crystal indicator, it is characterized in that, comprise the following steps:
S1, provide a kind of backlight module for liquid crystal indicator, described backlight module comprises multiple light source, the multiple switch be electrically connected with described light source respectively and the controller for controlling described each switch on and off; Be numbered successively described multiple light source, the numbering of described multiple light source is respectively 1,2 ... n;
The numbering i of the light source used when once opening backlight module before S2, reading, wherein i is any one numerical value in 1 to n;
Whether S3, inspection the i-th+1 light source can normally work; If described the i-th+1 light source can normally work, then perform step S4; If described the i-th+1 light source cisco unity malfunction, then perform step S5;
S4, enable described the i-th+1 light source and the value of recorded i is added 1;
S5, the value of i is added 1, then return step S3 and continue to perform, until detect the light source that can normally work;
Described step S3 comprises: pre-set current threshold; Detect the current value of described the i-th+1 light source; When the current value of described the i-th+1 light source detected exceedes described current threshold, described the i-th+1 light source can normally work; When the current value of described the i-th+1 light source detected is less than described current threshold, described the i-th+1 light source then cisco unity malfunction;
Described step S4 comprises: control switch conduction corresponding to the i-th+1 light source thus open the i-th+1 light source, in a recorder by the number record of the numbering of light source of opening and the switch of its correspondence simultaneously;
When the light source cisco unity malfunction of described detection, send alarm;
When the value of i is n, returns detection the 1st light source and whether normally work;
Described each light source comprises multiple backlight be arranged in parallel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428962.2A CN103474035B (en) | 2013-09-18 | 2013-09-18 | A kind of backlight module for liquid crystal indicator and control method thereof |
| PCT/CN2013/084099 WO2015039359A1 (en) | 2013-09-18 | 2013-09-24 | Backlight module for liquid crystal display device and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428962.2A CN103474035B (en) | 2013-09-18 | 2013-09-18 | A kind of backlight module for liquid crystal indicator and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103474035A CN103474035A (en) | 2013-12-25 |
| CN103474035B true CN103474035B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310428962.2A Active CN103474035B (en) | 2013-09-18 | 2013-09-18 | A kind of backlight module for liquid crystal indicator and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103474035B (en) |
| WO (1) | WO2015039359A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105250037A (en) * | 2015-09-16 | 2016-01-20 | 上海波鸿医疗器械科技有限公司 | Cold light source lighting device |
| CN206194295U (en) * | 2016-11-15 | 2017-05-24 | 京东方科技集团股份有限公司 | Data line demultiplexer , display substrates , display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568123A (en) * | 2003-07-10 | 2005-01-19 | 台北沛波电子股份有限公司 | Multiple luminous tube lighting device |
| CN101586751A (en) * | 2009-04-10 | 2009-11-25 | 深圳华映显示科技有限公司 | Light source system |
| CN203120248U (en) * | 2013-02-21 | 2013-08-07 | 深圳市山本光电有限公司 | Circuit structure of LED backlight source |
| CN103280203A (en) * | 2013-05-28 | 2013-09-04 | 深圳市华星光电技术有限公司 | LED (light-emitting diode) backlight driving circuit, LCD (liquid crystal display) device and driving method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3052318B2 (en) * | 1989-10-31 | 2000-06-12 | セイコーエプソン株式会社 | Projector and control method thereof |
| JPH10228020A (en) * | 1998-03-10 | 1998-08-25 | Digital Electron Corp | Liquid crystal display device |
| US20090153462A1 (en) * | 2005-12-08 | 2009-06-18 | Sharp Kabushiki Kaisha | Illumination device and display apparatus provided with the same |
| KR20080015322A (en) * | 2006-08-14 | 2008-02-19 | 삼성전자주식회사 | Backlight unit and liquid crystal display comprising the same |
| CN101013559A (en) * | 2007-01-30 | 2007-08-08 | 京东方科技集团股份有限公司 | LED brightness control circuit and backlight of LCD |
-
2013
- 2013-09-18 CN CN201310428962.2A patent/CN103474035B/en active Active
- 2013-09-24 WO PCT/CN2013/084099 patent/WO2015039359A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568123A (en) * | 2003-07-10 | 2005-01-19 | 台北沛波电子股份有限公司 | Multiple luminous tube lighting device |
| CN101586751A (en) * | 2009-04-10 | 2009-11-25 | 深圳华映显示科技有限公司 | Light source system |
| CN203120248U (en) * | 2013-02-21 | 2013-08-07 | 深圳市山本光电有限公司 | Circuit structure of LED backlight source |
| CN103280203A (en) * | 2013-05-28 | 2013-09-04 | 深圳市华星光电技术有限公司 | LED (light-emitting diode) backlight driving circuit, LCD (liquid crystal display) device and driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103474035A (en) | 2013-12-25 |
| WO2015039359A1 (en) | 2015-03-26 |
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