CN103322457A - Light bar, backlight module and display device - Google Patents
Light bar, backlight module and display device Download PDFInfo
- Publication number
- CN103322457A CN103322457A CN2013102594781A CN201310259478A CN103322457A CN 103322457 A CN103322457 A CN 103322457A CN 2013102594781 A CN2013102594781 A CN 2013102594781A CN 201310259478 A CN201310259478 A CN 201310259478A CN 103322457 A CN103322457 A CN 103322457A
- Authority
- CN
- China
- Prior art keywords
- lamp bar
- protective layer
- graphite linings
- backlight module
- light bar
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0209—External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10113—Lamp
Abstract
The invention provides a light bar which comprises light-emitting devices 102 and a printed circuit board 101. A graphite layer 2 is arranged on the light bar. By arranging the graphite layer on the light bar which is applied to a display device, the technical problem of heat dissipation of the light bar is solved. The light bar has the advantages that unexpected deformation like wrinkles or humps of diaphragms around the light bar after long-time use can be avoided.
Description
Technical field
The present invention relates to field of display devices, relate in particular to a kind of lamp bar, backlight module and display unit.
Background technology
Fig. 1 is the structural representation of lamp bar in the prior art, as shown in Figure 1, the lamp bar of display unit (Light bar) generally comprises in the prior art: printed circuit board (PCB) 101(PCB Board), be located at luminescent device 102 on the described printed circuit board (PCB), be located at the holding wire 103(Connector on the described printed circuit board (PCB));
Wherein, described luminescent device comprises the luminescent devices such as LED; Described holding wire is used for transmission of electric signals, and described holding wire comprises flexible printed circuit board (FPC, Flexible Printed Circuit) RCA.
Lamp bar of the prior art can cause the lamp bar very high near a side temperature of luminescent device after luminescent device is lighted.When long-time use lamp bar and heat can not get dispersing timely, can cause thin prism, the diffusion sheet Dou Hui Yin Gaowen of close lamp bar in the display unit that deformation occurs, for example slightly heave, and then affect the image quality of display unit.And during the long-time hot operation of lamp bar, reduced in the life-span of display unit.
Summary of the invention
In order to solve the technical problem of lamp bar heat radiation, the invention provides a kind of lamp bar, backlight module and display unit, for the heat radiation of lamp bar provides feasible technical scheme.
A kind of lamp bar provided by the invention comprises luminescent device and printed circuit board (PCB), is provided with graphite linings on the described lamp bar.
Further, lamp bar of the present invention, described graphite linings is arranged on the printed circuit board (PCB) of described lamp bar.
Further, lamp bar of the present invention, the top of described graphite linings is provided with the first protective layer.
Further, lamp bar of the present invention is provided with the second protective layer between described lamp bar and described graphite linings, and described the second protective layer is provided with louvre.
Further, lamp bar of the present invention, the material of described the first protective layer and the second protective layer comprises hard heat-insulating plastics or pottery.
Further, lamp bar of the present invention, described graphite linings is pasted mutually by double faced adhesive tape and described the first protective layer and described the second protective layer.
Further, lamp bar of the present invention, described luminescent device are LED.
The present invention also provides a kind of backlight module, comprises metal backing, and described backlight module comprises lamp bar of the present invention.
Further, backlight module of the present invention, the graphite linings of described lamp bar is connected with metal wire, and described metal wire connects described metal backing, and the heat of graphite linings is directed into described metal backing.
The present invention also provides a kind of display unit, comprises backlight module of the present invention.
A kind of lamp bar provided by the invention, backlight module and display unit by being provided with graphite linings at the lamp bar, have solved the technical problem of lamp bar heat radiation itself, and its beneficial effect is:
The high heat that the lamp bar produces can import to rapidly on the graphite linings, utilizes the good characteristic of thermal conductivity ratio metal of graphite, can avoid long-time the use after, the diaphragm fold around the lamp bar or the bad deformation such as heave.
Description of drawings
Fig. 1 is the structural representation of lamp bar in the prior art;
Fig. 2 is the structural representation of lamp bar of the present invention;
Fig. 3 is the structural representation that the present invention's lamp bar shown in Figure 2 is provided with described the first protective layer;
Fig. 4 is the structural representation that the present invention's lamp bar shown in Figure 3 is provided with described the second protective layer;
Fig. 5 is the structural representation that the present invention's the second protective layer shown in Figure 4 is provided with louvre;
Fig. 6 is the structural representation that the present invention's lamp bar shown in Figure 5 is provided with metal wire;
The label of Figure of description of the present invention is as follows:
101-printed circuit board (PCB), 102-luminescent device, 103-holding wire;
2-graphite linings, 3-the first protective layer, 4-the second protective layer, 401-louvre, 5-metal wire.
The specific embodiment
In order to understand better the present invention, the invention will be further described below in conjunction with accompanying drawing and the specific embodiment.
A kind of lamp bar that the embodiment of the invention provides, Fig. 2 is the structural representation of lamp bar of the present invention, as shown in Figure 2, described lamp bar comprises luminescent device 102 and printed circuit board (PCB) 101, is provided with graphite linings 2 on the described lamp bar.
Further, the described lamp bar of the embodiment of the invention, described graphite linings 2 is arranged on the printed circuit board (PCB) 101 of described lamp bar.
Wherein, the lamp bar also comprises the holding wire 103 of being located on the printed circuit board (PCB) 101; The thickness of graphite linings 2 is no more than 0.1mm.
In order to realize the slimming of display unit, for example the ultra-thin display showing device needs the device size in the strict control display device, and the thickness of therefore preferred graphite linings is no more than 0.1mm, with the thickness of strict control graphite linings.
The described lamp bar of the embodiment of the invention dispels the heat rapidly by graphite linings, the diaphragm fold around its that can avoid that lamp bar excess Temperature causes or the bad deformation such as heave.
In addition, because graphite linings is to be arranged on the lamp bar, rather than the backlight module metal backing of display unit, therefore can avoid being located at the graphite linings of backlight module metal backing and other devices of display unit interfere phenomenon, such as water ripple phenomenon etc., affect the quality of display unit.Wherein, water ripples (ripple) are if attach miscellaneous part after referring to the backlight module metal backing, and in the situation of the interference of self interfering or occuring under external force, interference point has phenomenon as the ripple at display screen, and is especially very obvious when rocking.And graphite linings is arranged at and also helps Pogo test on the lamp bar, and Pogo refers to a kind of pressure test of LCD reliability evaluation aspect, after being used for characterizing the display screen assembling system, through meeting behind the pressure repeatedly, produces the how damage of potentiality.
The lamp bar can keep flat or be sidelong in display unit.Keep flat the printed circuit board (PCB) that refers to the lamp bar parallel with display screen, the light-emitting area of the luminescent device of lamp bar makes the light of luminescent device inject LGP towards LGP; The light-emitting area of being sidelong the luminescent device that refers to the lamp bar is parallel with the printed circuit board (PCB) of lamp bar, and the light-emitting area of the luminescent device of lamp bar makes the light of luminescent device inject LGP towards LGP.The lamp bar is sidelong the thickness that can further reduce display unit in display unit.
Further, the described lamp bar of the embodiment of the invention, Fig. 3 are the structural representation that the present invention's lamp bar shown in Figure 2 is provided with described the first protective layer, and as shown in Figure 3, the top of described graphite linings 2 is provided with the first protective layer 3.
The first protective layer can avoid graphite linings to be scratched.
Further; the described lamp bar of the embodiment of the invention; Fig. 4 is the structural representation that the present invention's lamp bar shown in Figure 3 is provided with described the second protective layer; as shown in Figure 4; between described lamp bar and described graphite linings 2, be provided with the second protective layer 4; Fig. 5 is the structural representation that the present invention's the second protective layer shown in Figure 4 is provided with louvre, and as shown in Figure 5, described the second protective layer is provided with louvre 401.
The second protective layer 4 is specifically between printed circuit board (PCB) 101 and graphite linings 2.
The second protective layer can avoid graphite linings to be scratched, and louvre can make the heat of lamp bar transfer to graphite linings.
The second protective layer is for the protection of the downside of graphite linings, but the downside of graphite linings is the lamp bar, need to import the temperature of lamp bar into described graphite linings, and therefore described the second protective layer is provided with louvre, and described louvre imports the temperature of lamp bar into described graphite linings.
Further, the described lamp bar of the embodiment of the invention, the material of described the first protective layer and the second protective layer comprises hard heat-insulating plastics or pottery.
The first protective layer utilizes the large characteristics of ceramic hardness, can effectively protect soft graphite linings to be without prejudice, and especially when lamp strip unit being joined into backlight (BLU, Back Light Unit), need to protect well graphite linings, to avoid its scuffing.Wherein backlight provides light source, and light source sees through glass substrate and penetrates.
In addition, the first protective layer utilizes the characteristics of ceramic insulation, can make the heat of described graphite linings can not cause adverse effect to the Sensitive Apparatus of lamp bar periphery.If be located at around the temperature of the graphite linings on the lamp bar at will is distributed to, can make the diaphragm generation deformation around the lamp bar.
The hard heat-insulating plastics also have the These characteristics of pottery, can be used as the substitute of ceramic material.
The first protective layer is mainly protected the upside of graphite linings, and prevents that the temperature of graphite linings upside from distributing.
Identical with the THICKNESS CONTROL principle of graphite linings, the first protective layer also needs strictly to control its thickness, with its thickness limits within 0.1mm.
The pottery of taking of the second protective layer waits the principle of hard material protection graphite linings identical with the principle of the first protective layer, therefore repeats no more.
Identical with the THICKNESS CONTROL principle of graphite linings, the second protective layer also needs strictly to control its thickness, with its thickness limits within 0.1mm.
Further, the described lamp bar of the embodiment of the invention, described graphite linings is pasted mutually by double faced adhesive tape and described the first protective layer and described the second protective layer.
Double faced adhesive tape also has following technique effect except making graphite linings and the first protective layer, graphite linings and the second protective layer bonding:
Be no more than the first protective layer of the ceramic material of 0.01mm for thickness, when it was mounted to display unit, phenomenon easily was damaged.Therefore between described graphite linings and described the first protective layer, be provided with layers of two-sided, utilize double faced adhesive tape with on the stickup of the first protective layer and the graphite linings, the damage that the first protective layer that can effectively avoid thickness to be no more than the ceramic material of 0.01mm occurs when assembling.The second protective layer also has same principle.As seen double faced adhesive tape can also further make the thickness of the first protective layer and the second protective layer less, makes its thickness further be no more than 0.01mm.If do not adopt double faced adhesive tape that the first protective layer and the second protective layer are installed, the first protective layer and second protective layer that can cause thickness further to be no more than 0.01mm damage.
Further, the described lamp bar of the embodiment of the invention, described luminescent device is LED.
The embodiment of the invention also provides a kind of backlight module, comprises metal backing, and described backlight module comprises lamp bar of the present invention.
Further, the described backlight module of the embodiment of the invention, Fig. 6 is the structural representation that the present invention's lamp bar shown in Figure 5 is provided with metal wire, as shown in Figure 6, the graphite linings 2 of described lamp bar is connected with metal wire 5, described metal wire 5 connects described metal backing, and the heat of graphite linings 2 is directed into described metal backing.
Because described metal backing is the habitual device of display unit, therefore, described metal backing does not show in Fig. 6.
Described metal wire can import to the heat of graphite linings rapidly on the metal backing, can reach rapidly thermal balance, and heat transfer efficiency is high, makes the wider, more even of spread heat, and radiating effect is better.And for small size display terminal products such as small size notebook, mobile phone, panel computer, navigator, Vehicular display devices, because because the back light system space is little, component locations is compact, if heat can not get timely derivation, can be easy to cause blooming piece bad.Therefore more need the heat of the lamp bar that it is inner to import to the external world, to avoid the too high device distortion that causes of lamp bar peripheral temperature or to damage.
Metal backing does not arrange graphite linings in addition, avoided the graphite linings of backlight module and display unit other devices between interference.
Below only be the preferred embodiments of the present invention; certainly; the present invention can also have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. a lamp bar comprises luminescent device and printed circuit board (PCB), it is characterized in that, is provided with graphite linings on the described lamp bar.
2. lamp bar as claimed in claim 1 is characterized in that, described graphite linings is arranged on the printed circuit board (PCB) of described lamp bar.
3. lamp bar as claimed in claim 1 is characterized in that, the top of described graphite linings is provided with the first protective layer.
4. lamp bar as claimed in claim 3 is characterized in that, is provided with the second protective layer between described lamp bar and described graphite linings, and described the second protective layer is provided with louvre.
5. lamp bar as claimed in claim 4 is characterized in that, the material of described the first protective layer and the second protective layer comprises hard heat-insulating plastics or pottery.
6. lamp bar as claimed in claim 4 is characterized in that, described graphite linings is pasted mutually by double faced adhesive tape and described the first protective layer and described the second protective layer.
7. lamp bar as claimed in claim 1 is characterized in that, described luminescent device is LED.
8. a backlight module comprises metal backing, it is characterized in that, described backlight module comprises each described lamp bar such as claim 1-7.
9. backlight module as claimed in claim 8 is characterized in that, the graphite linings of described lamp bar is connected with metal wire, and described metal wire connects described metal backing, and the heat of graphite linings is directed into described metal backing.
10. a display unit is characterized in that, described display unit comprises as claimed in claim 8 or 9 backlight module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259478.1A CN103322457B (en) | 2013-06-26 | 2013-06-26 | Light bar, backlight module and display device |
| PCT/CN2013/088103 WO2014206003A1 (en) | 2013-06-26 | 2013-11-29 | Light bar, backlight module, and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259478.1A CN103322457B (en) | 2013-06-26 | 2013-06-26 | Light bar, backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322457A true CN103322457A (en) | 2013-09-25 |
| CN103322457B CN103322457B (en) | 2015-04-01 |
Family
ID=49191381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310259478.1A Expired - Fee Related CN103322457B (en) | 2013-06-26 | 2013-06-26 | Light bar, backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103322457B (en) |
| WO (1) | WO2014206003A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014206003A1 (en) * | 2013-06-26 | 2014-12-31 | 合肥京东方光电科技有限公司 | Light bar, backlight module, and display apparatus |
| CN104317088A (en) * | 2014-10-22 | 2015-01-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN107272259A (en) * | 2017-07-13 | 2017-10-20 | 武汉天马微电子有限公司 | A kind of LED light bar and backlight module |
| CN114447254A (en) * | 2022-02-18 | 2022-05-06 | 京东方科技集团股份有限公司 | Display module, manufacturing method and display device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014206003A1 (en) * | 2013-06-26 | 2014-12-31 | 合肥京东方光电科技有限公司 | Light bar, backlight module, and display apparatus |
| CN104317088A (en) * | 2014-10-22 | 2015-01-28 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| CN107272259A (en) * | 2017-07-13 | 2017-10-20 | 武汉天马微电子有限公司 | A kind of LED light bar and backlight module |
| CN114447254A (en) * | 2022-02-18 | 2022-05-06 | 京东方科技集团股份有限公司 | Display module, manufacturing method and display device |
| CN114447254B (en) * | 2022-02-18 | 2024-04-05 | 京东方科技集团股份有限公司 | Display module, manufacturing method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014206003A1 (en) | 2014-12-31 |
| CN103322457B (en) | 2015-04-01 |
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