CN101825266A - LED light tube power panel applied to liquid crystal display - Google Patents
LED light tube power panel applied to liquid crystal display Download PDFInfo
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- CN101825266A CN101825266A CN 201010160839 CN201010160839A CN101825266A CN 101825266 A CN101825266 A CN 101825266A CN 201010160839 CN201010160839 CN 201010160839 CN 201010160839 A CN201010160839 A CN 201010160839A CN 101825266 A CN101825266 A CN 101825266A
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Abstract
The invention relates to an LED light tube power panel applied to a liquid crystal display, which is characterized by comprising an LED power panel bottom plate and an adapter plate. The LED power panel bottom plate is connected and fixed with the adapter plate through a metal contact pin, and the adapter plate is provided with a connector for connecting with the LED light tube. A voltage output end on the LED power panel bottom plate is connected with the voltage input end of the connector, and an LED light tube current feedback signal input end on the LED power panel bottom plate is connected with an LED light tube current feedback signal output end of the connector through a metal contact pin. The power panel can be conveniently matched with an LED light tube interface with different amounts of input and output functional pins and an LED light tube interface with different input and output functional pin arrangement modes, thereby avoiding redesigning the LED light tube power panel of the liquid crystal display, and reducing the design and manufacture cost of the LED light tube power panel.
Description
Technical field
The present invention relates to a kind of LED light tube power panel that is applied to LCD.
Background technology
The LED fluorescent tube begins to replace the CCFL fluorescent tube as Backlight For Liquid Crystal Display Panels at present.The operating voltage that adopts as Backlight For Liquid Crystal Display Panels CCFL fluorescent tube is generally greater than 500V, and operating frequency is at 40KHZ-60KHZ; The operating voltage that adopts as Backlight For Liquid Crystal Display Panels LED fluorescent tube generally is the DC voltage between the 30V-80V, so the CCFL fluorescent tube is different with the drive circuit that the LED fluorescent tube is adopted.General CCFL fluorescent tube adopts the booster circuit of INVERTER inverter, and the LED fluorescent tube adopts the DC-DCBoost booster circuit usually.Aspect the drive circuit output interface, the CCFL fluorescent tube has only input high-voltage line and low pressure feedback line, and the output interface syndeton is simple on its drive circuit board, can make DIP hand plug-in unit and connect, and can be located on the PCB single sided board and use; And the LED fluorescent tube adopts the connection in series-parallel arrangement mode usually; as: every LED fluorescent tube in the panel of AUOM185XW01V6 model adopts 6 groups of parallel connections; each group is become by 12 light emitting diode string joint groups; so the connecting interface of exporting on the corresponding drive circuit board is comparatively complicated; and the connector technology of DIP hand plug-in unit is not mature enough at present; former each production of liquid crystal displays producer still is the comparatively ripe paster connector of employing technology to output connecting interface on the LED lamp tube drive circuit plate usually, and this connector only is suitable for being attached to the doubling plate upper face.In addition, the connection in series-parallel number of the light emitting diode of the LED fluorescent tube that liquid crystal panel producer adopts has nothing in common with each other, even the connection in series-parallel number of the LED fluorescent tube that adopts of the liquid crystal panel of same liquid crystal panel producer different size specification is also inequality, and the arrangement mode of the LED fluorescent tube input pin of each liquid crystal panel producer and each group electric current output pin also is not quite similar, quantity and arrangement mode diversity ratio are bigger thereby the light emitting diode that makes the LED fluorescent tube of different liquid crystal employing is connected, cause its needed driving voltage and drive circuit out connector also different, cause the LED power panel can't do standardized designs, thus the cost that increases design and make.
Summary of the invention
The object of the present invention is to provide a kind of LED light tube power panel that is applied to LCD, this power panel has solved present LED power panel because of doing standardized designs, can't satisfy the LED fluorescent tube interface that all size liquid crystal panel is adopted simultaneously with various different pin numbers and difference in functionality pin arrangements mode, and the problem that design that causes and manufacturing cost rise.
The present invention is achieved in that a kind of LED light tube power panel that is applied to LCD, it is characterized in that: comprise LED power panel base plate and keyset, described LED power supply base plate is connected and fixed by metal ferrule and keyset, described keyset is provided with and is used for the connector that is connected with the LED fluorescent tube, voltage output end on the described LED power panel base plate is connected with the voltage input end of described connector, and the LED lamp current feedback signal input on the described LED power panel base plate is connected with the LED lamp current feedback signal output of described connector through metal ferrule.
Described LED power panel base plate comprises the AC-DC converter; LED drives PWMIC; DC-DCBOOST booster circuit and output filter circuit; overvoltage crowbar; the output of described AC-DC converter connects the input of DC-DCBOOST booster circuit; the output of DC-DCBOOST booster circuit connects output filter circuit; the output filter circuit output is connected with the input of overvoltage crowbar; the output of overvoltage crowbar drives PWMIC with LED and is connected, and LED drives the control signal input of the modulation signal output connection DC-DCBOOST booster circuit of PWMIC.
Described LED power panel backplane voltage output is the output of described output filter circuit.
LED lamp current feedback signal input on the described LED power panel base plate is the feedback signal input that described LED drives PWMIC.
Described connector is the paster connector.
The invention has the advantages that, can be by various connectors be set on keyset flexibly, can conveniently mate the LED fluorescent tube interface with varying number input/output function pin and the LED fluorescent tube interface of different input/output function pin arrangements modes, thereby avoided redesign, reduced the design and the manufacturing cost of LED light tube power panel LCD LED light tube power panel.
Description of drawings
Fig. 1 LED power panel of the present invention connection diagram.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
With reference to figure 1, a kind of LED light tube power panel that is applied to LCD, comprise LED power panel base plate 1 and keyset 2, described LED power supply base plate 1 is connected and fixed by metal ferrule and keyset 2, described keyset 2 is provided with and is used for the connector that is connected with the LED fluorescent tube, voltage output end on the described LED power panel base plate 1 is connected with the voltage input end of corresponding described connector through metal ferrule, and the LED lamp current feedback signal input on the described LED power panel base plate 1 is connected with the LED lamp current feedback signal output of corresponding described connector through metal ferrule.Described metal ferrule is in order to the electric signal between transmission LED power supply base plate and the keyset, transmits the current feedback signal of each lamp string output in required supply voltage of LED fluorescent tube and the LED fluorescent tube that is:.
Described LED power panel base plate 1 comprises AC-DC converter 3; LED drives PWMIC; DC-DCBOOST booster circuit and output filter circuit; overvoltage crowbar; the output of described AC-DC converter connects the input of DC-DCBOOST booster circuit; the output of DC-DCBOOST booster circuit connects output filter circuit; the output filter circuit output is connected with the input of overvoltage crowbar; the output of overvoltage crowbar drives PWMIC with LED and is connected, and LED drives the control signal input of the modulation signal output connection DC-DCBOOST booster circuit of PWMIC.
Described LED power panel backplane voltage output is the output of described output filter circuit.
LED lamp current feedback signal input on the described LED power panel base plate is the feedback signal input that described LED drives PWMIC.
Know clearly it, in the present embodiment, the base plate 1 of described LED power panel is with the power panel after the CCFL light tube power panel change design of LCD (base plate can use the comparatively cheap single sided board of price), be about to the circuit cancel all of the Inverter inverter on the CCFL light tube power panel of LCD, and change is designed to the DC-DC step-up converter circuit.The zone 5 of LED power panel base plate 1 is provided with the jack A1 of metal ferrule, A2 ... An, B, C, D, E.Jack A1, A2 ... An is connected in each current feedback signal input that described LED drives PWMIC, and jack B and jack C are connected in the output of output filter circuit.The paster connector G1 that keyset 2 is provided with, G2 ... (keyset 2 is a dual platen to Gn, paster connector G1, G2 ... Gn is used to mate the designed LED fluorescent tube input interface of each liquid crystal panel producer); Keyset 2 is provided with metal ferrule jack A11, A12 ... A1n, B ', C ', D ', E '.LED power panel base plate 1 is connected with keyset by metal ferrule, earlier with described metal ferrule a1, and a2 ... an, b, the corresponding respectively jack A11 that is welded in keyset of c, d, the end of e, A12 ... A1n, B ', C ', D ', E ' is again with metal ferrule a1, a2 ... an, b, c, the corresponding respectively jack A1 that is welded in LED power panel base plate of d, the other end of e, A2 ... An, B, C, D, E, thus LED power panel base plate 1 and keyset 2 are connected to a fixed.
In addition, each jack of metal ferrule A11 in the keyset 2, A12 ... A1n, B ', C ' makees wire jumper by the Zero-ohm resistor of paster and is connected to paster connector G1, G2 ... on each corresponding function pin of Gn.Wherein, metal ferrule a1, a2 ... an is used for driving to LED the current feedback signal of PWMIC transmission LED tube circuit; Metal ferrule b and metal ferrule c are used for the output filter circuit output end voltage is transferred to LED fluorescent tube input feeder ear; Metal ferrule d and metal ferrule e then are used to strengthen fixed L ED power panel base plate and keyset.
It is to be noted, when the LED fluorescent tube only needs a connector, described keyset 2 also only need be provided with a paster connector that matches, each metal ferrule jack of metal ferrule A11 then, A12 ... A1n, B ', C ' is as long as do on each corresponding function pin that wire jumper also is connected to this paster connector by the Zero-ohm resistor of paster.
In addition, the 4 selected LED current feedback number of pins that drives PWMIC in the zone of described base plate 1 will be given birth to liquid crystal panel so that mate more different manufacturers as much as possible.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. LED light tube power panel that is applied to LCD, it is characterized in that: comprise LED power panel base plate and keyset, described LED power supply base plate is connected and fixed by metal ferrule and keyset, described keyset is provided with and is used for the connector that is connected with the LED fluorescent tube, voltage output end on the described LED power panel base plate is connected with the voltage input end of described connector, and the LED lamp current feedback signal input on the described LED power panel base plate is connected with the LED lamp current feedback signal output of described connector through metal ferrule.
2. a kind of LED light tube power panel that is applied to LCD according to claim 1; it is characterized in that: described LED power panel base plate comprises the AC-DC converter; LED drives PWMIC; DC-DCBOOST booster circuit and output filter circuit; overvoltage crowbar; the output of described AC-DC converter connects the input of DC-DCBOOST booster circuit; the output of DC-DCBOOST booster circuit connects output filter circuit; the output filter circuit output is connected with the input of overvoltage crowbar; the output of overvoltage crowbar drives PWMIC with LED and is connected, and LED drives the control signal input of the modulation signal output connection DC-DCBOOST booster circuit of PWMIC.
3. according to claim 1 and 2 described a kind of LED light tube power panels that are applied to LCD, it is characterized in that: the voltage output end of described LED power panel base plate is the output of described output filter circuit.
4. according to claim 1 and 2 described a kind of LED light tube power panels that are applied to LCD, it is characterized in that: the LED lamp current feedback signal input on the described LED power panel base plate is the feedback signal input that described LED drives PWMIC.
5. a kind of LED light tube power panel that is applied to LCD according to claim 1, it is characterized in that: described connector is the paster connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010160839 CN101825266B (en) | 2010-04-30 | 2010-04-30 | LED light tube power panel applied to liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010160839 CN101825266B (en) | 2010-04-30 | 2010-04-30 | LED light tube power panel applied to liquid crystal display |
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| Publication Number | Publication Date |
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| CN101825266A true CN101825266A (en) | 2010-09-08 |
| CN101825266B CN101825266B (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010160839 Active CN101825266B (en) | 2010-04-30 | 2010-04-30 | LED light tube power panel applied to liquid crystal display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170726A (en) * | 2011-01-28 | 2011-08-31 | 创维液晶器件(深圳)有限公司 | LED constant current power supply panel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807292Y (en) * | 2005-01-28 | 2006-08-16 | 张杨敬 | LCD back light source with LED as light source |
| CN201111805Y (en) * | 2007-08-30 | 2008-09-10 | 深圳市日月明光电科技有限公司 | LED display device |
| CN201403226Y (en) * | 2009-04-27 | 2010-02-10 | 沈阳同方多媒体科技有限公司 | LED backlight driving device |
| WO2010041496A1 (en) * | 2008-10-10 | 2010-04-15 | シャープ株式会社 | Illuminating device and liquid crystal display device |
| CN201440747U (en) * | 2009-07-21 | 2010-04-21 | 北京诚创星光科技有限公司 | Led series drive |
-
2010
- 2010-04-30 CN CN 201010160839 patent/CN101825266B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807292Y (en) * | 2005-01-28 | 2006-08-16 | 张杨敬 | LCD back light source with LED as light source |
| CN201111805Y (en) * | 2007-08-30 | 2008-09-10 | 深圳市日月明光电科技有限公司 | LED display device |
| WO2010041496A1 (en) * | 2008-10-10 | 2010-04-15 | シャープ株式会社 | Illuminating device and liquid crystal display device |
| CN201403226Y (en) * | 2009-04-27 | 2010-02-10 | 沈阳同方多媒体科技有限公司 | LED backlight driving device |
| CN201440747U (en) * | 2009-07-21 | 2010-04-21 | 北京诚创星光科技有限公司 | Led series drive |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170726A (en) * | 2011-01-28 | 2011-08-31 | 创维液晶器件(深圳)有限公司 | LED constant current power supply panel |
| CN102170726B (en) * | 2011-01-28 | 2013-10-23 | 创维液晶器件(深圳)有限公司 | LED constant current power supply panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101825266B (en) | 2013-08-21 |
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Address after: 350300 Fuqing City, Fuzhou, Fujian, the reunification of overseas Chinese economic and Technological Development Zone Patentee after: TPV Electronic Technology (Fujian) Co., Ltd Address before: 350301 Yuan Hong Lu Shang Zheng, Fuqing City, Fuzhou City, Fujian Province Patentee before: Fujian Jielian Electronic Co Ltd |