CN103090275B - There is the LED-backlit module of flexible adjustment device - Google Patents
There is the LED-backlit module of flexible adjustment device Download PDFInfo
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- CN103090275B CN103090275B CN201310032855.8A CN201310032855A CN103090275B CN 103090275 B CN103090275 B CN 103090275B CN 201310032855 A CN201310032855 A CN 201310032855A CN 103090275 B CN103090275 B CN 103090275B
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- led
- heat sink
- backboard
- light guide
- guide plate
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Abstract
The invention provides the LED-backlit module with flexible adjustment device, it comprises light guide plate, LED lamp bar and heat sink and backboard, also elastic connecting component is provided with, in order to regulate the distance between described side plate and described vertical panel between the outside of the vertical panel of described heat sink and the side plate interior sides of described backboard; Also comprise the fixture be connected to by described bottom panel on described back of the body substrate.A kind of LED-backlit module with flexible adjustment device provided by the present invention, elastic connecting component is added between heat sink and backboard, make heat sink can realize certain relative motion in the cavity volume of backboard, make light guide plate like this in the backlight module course of work, be heated or moisture absorption and expanding causes its length to occur flexible time, the LED lamp bar on heat sink can be close on light guide plate at any time.
Description
Technical field
The present invention relates to field of display, especially relate to the LED-backlit module with flexible adjustment device.
Background technology
As shown in Figure 1, the LED(light emitting diode at existing display) in backlight module 1, in order to ensure the cooperation of light guide plate 11 and LED lamp bar 12, need to reserve certain gap between.But this gap generally can not be excessive, because if excessive, can light utilization efficiency be reduced, cause luminous energy loss, and then cause electric energy loss.Therefore in actual use, light guide plate 11 is more close to the LED 121 in LED lamp bar 12, then the result of use of this light guide plate 11 is best.And the reason of preset clearance is in LED-backlit module 1, in the course of work of LED-backlit module 1, LED 121 is luminous energy by electric energy conversion, produces certain heat, causes temperature in whole LED-backlit module 1 to rise.And this heat easily makes light guide plate 11 expanded by heating, and this light guide plate 11 also can absorb the moisture in air in a humid environment and expand.When light guide plate 11 is heated or after moisture expantion, the side of its light guide plate 11 can touch the surface of LED 121, LED 121 can be caused like this to damage by stress.And when LED-backlit module 1 run into variations in temperature comparatively large or humidity changes greatly time, when the length increase of the expansion of this light guide plate 11 is greater than the distance of preset clearance, light guide plate 11 owing to expanding and the stressed generation warpage in both sides, thus makes display frame bad.Bad performance is relevant with stress distribution, generally can form subcircular clear zone or the dark space of larger area, also there will be speck or the blackening of multizone small size, and when after light guide plate 11 warpage, to display device TFT(TFT) cause stress, thus make picture bad, particularly when light guide plate 11 pushes up bad LED 121, backlight function was lost efficacy.
Summary of the invention
The object of the invention is to solve the shortcoming that light guide plate in existing LED-backlit module is heated or easily warpage occurs after moisture expantion and cause display frame bad to the stress damage of LED, there is provided the LED-backlit module with flexible adjustment device, this flexible adjustment device is in order to tackle light guide plate because being heated or light guide plate in the longitudinal direction flexible after moisture expantion.
The technical scheme that the present invention solves the employing of its technical problem is: the LED-backlit module with flexible adjustment device, it comprises light guide plate, be placed in the LED lamp bar of described light guide plate both sides and fix heat sink and the backboard of described LED lamp bar, described backboard comprises orthogonal back of the body substrate and side plate, described back of the body substrate and described side plate are surrounded by a cavity volume jointly, described heat sink is positioned at the cavity volume of described backboard, described heat sink comprises orthogonal vertical panel and bottom panel, described LED lamp bar is fixed on the inner side of described vertical panel, the side plate of described backboard and the vertical panel of described heat sink facing, described heat sink is fixed on described back of the body substrate by described bottom panel, also elastic connecting component is provided with between the outside of the vertical panel of described heat sink and the side plate interior sides of described backboard, in order to regulate the distance between described side plate and described vertical panel.
Particularly, described in there is flexible adjustment device LED-backlit module also comprise the fixture be connected to by described bottom panel on described back of the body substrate, described fixture has the body of rod through described bottom panel and described back of the body substrate; Described bottom panel offers the conduit that the described body of rod is slided within it, to regulate the relative position of described bottom panel and described back of the body substrate along with the distance adjustment between described side plate and described vertical panel.
Particularly, the outside of the vertical panel of described heat sink is provided with step datum hole, the side plate interior sides of described backboard is provided with the boss relative with described step datum hole, and described elastic connecting component one end is placed in described step datum hole, and the other end is sheathed on described boss.
Particularly, described elastic connecting component comprises at least one spring, and one end of described spring abuts mutually with the vertical panel of described heat sink, and the other end abuts mutually with the side plate of described backboard.
Particularly, described LED lamp bar comprises a substrate, be located at LED on described substrate and bolster, and described substrate is fixed on the vertical panel of described heat sink and the opposite side of described light guide plate.
Further, the height of described bolster is greater than the height 0.1 ~ 0.3mm of described LED.
Further, described bolster is pasted on described substrate.
Particularly, the described body of rod is screw, described conduit is the elongated waist hole be opened on described bottom panel, described screw is through described elongated waist hole, the back of the body substrate of described backboard is provided with the through hole that can pass through for described screw, is also provided with the erection column can fixed for described screw at described back of the body substrate relative to the opposite side of described bottom panel.
Further, described erection column is provided with the internal thread fixing with described screw fit.
Further, be also provided with bullet pad and plain cushion between the head of described screw and the bottom panel of described heat sink, described bullet pad and described plain cushion are sheathed on described screw.
Further, described screw is step machine tooth screw.
Beneficial effect of the present invention is: the LED-backlit module with flexible adjustment device provided by the present invention, elastic connecting component is added between heat sink and backboard, make heat sink can realize certain relative motion in backboard inside, make light guide plate like this in the backlight module course of work, be heated or moisture absorption and expanding causes its length to occur flexible time, LED lamp bar on heat sink can be close on light guide plate at any time, and this structure be close to, the guide-lighting efficiency of light guide plate to LED lamp bar can be improved on the one hand, improve the utilization rate of LED, reduce luminous energy to damage as far as possible, thus saving electric energy, on the other hand, this elastic construction, ensure that light guide plate is in the telescopic process expanded, light guide plate and LED lamp bar can fully dissolve light guide plate because of expanding to the stress that LED produces by elastic connecting component, LED is made to be unlikely to by stress and to damage, and light guide plate also can not cause warpage because of expansion, thus avoid because the bad problem of the display frame that brings of light guide plate warpage.
Accompanying drawing explanation
Fig. 1 is the half sectional view of traditional LED-backlit module;
Fig. 2 is the half sectional view of the LED-backlit module that the embodiment of the present invention provides;
Fig. 3 is the partial enlarged drawing at A place in Fig. 2;
Fig. 4 is the partial enlarged drawing at B place in Fig. 2.
In figure: 1-tradition LED-backlit module 11-light guide plate 12-LED lamp bar 121-LED lamp;
2-LED backlight module 21-light guide plate
22-LED lamp bar 221-substrate 222-bolster
23-heat sink 231-vertical panel 2311-step datum hole
232-bottom panel 2321-conduit (elongated waist hole)
24-backboard 241-side plate 2411-boss
242-carries on the back the through hole 2422-erection column that substrate 2421-carries on the back substrate
243-cavity volume
25-elastic connecting component 26-fixture
The 261-body of rod (screw) 262-plain cushion 263-bullet pad
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See Fig. 2-Fig. 4, it is the LED-backlit module 2 with flexible adjustment device provided by the present invention.It comprises light guide plate 21, is placed in heat sink 23 and the backboard 24 of the LED lamp bar 22 of light guide plate 21 both sides and fixing described LED lamp bar 22, backboard 24 comprises orthogonal back of the body substrate 242 and side plate 241, back of the body substrate 242 is surrounded by a cavity volume 243 jointly with side plate 241, heat sink 23 is positioned at the cavity volume 243 of backboard 24, and specifically in the present embodiment, heat sink 23 is in L font structure, heat sink 23 comprises orthogonal vertical panel 231 and bottom panel 232, vertical panel 231 and bottom panel 232 one-body molded.Be respectively equipped with two heat sinks 23 relatively established in light guide plate 21 both sides, and on the vertical panel 231 of heat sink 23, be installed with two LED lamp bar 22 of relatively establishing, and the light emitting source of LED lamp bar 22 is relative with light guide plate.LED lamp bar 22 is fixed on the inner side of described vertical panel 231, and the side plate 241 of backboard 24 is facing with the vertical panel 231 of heat sink 23, and heat sink 23 is fixed on back of the body substrate 242 by bottom panel 232.Elastic connecting component 25 is also provided with, in order to regulate the distance between side plate 241 and vertical panel 231 between inside the outside of the vertical panel 231 of heat sink 23 and the side plate 241 of backboard 24.This elastic parts 25 makes the heat sink 23 in LED-backlit module 2 can have certain operating range in the horizontal direction with backboard 24, and makes the LED lamp bar 22 be located on the vertical panel 231 of heat sink 23 can be affixed on the side of light guide plate 21.And this matching relationship between LED lamp bar 22 and light guide plate 21, the guide-lighting efficiency of light guide plate 21 pairs of LED lamp bar 22 can be improved, and improve the utilization rate of LED, reduce luminous energy as far as possible and damage, thus save electric energy, improve the efficiency of whole LED-backlit module 2.And this elastic connecting component 25 makes in LED-backlit module 2 two heat sinks 23 can have the distance of one section of relative motion between the biside plate 241 of backboard 24.Namely this move distance is the extendable room of light guide plate 21.In the present invention, the adjustable range of this elastic connecting component 25 is between 0.5 ~ 2mm, and be equipped with elastic connecting component 25 in the horizontal both sides of light guide plate 21, make namely in LED-backlit module 2 in the present invention, the scalable scope of light guide plate 21 is between 0 ~ 4mm.And telescopic extensions can ensure that light guide plate 21 all there will not be light guide plate 21 to extrude and causes the LED in LED lamp bar 22 to be broken when using in any environment, backlight module is caused to lose efficacy; Or light guide plate 21 is owing to expanding, in backlight module, space causes light guide plate 21 warpage not and occurs the problem appearance that display frame is bad.
Meanwhile, in the cavity volume 243 that elastic connecting component 25 makes heat sink 23 can be formed at backboard 24 during relative movement one segment distance, the bottom panel 232 of heat sink 23 is also fixed on the back of the body substrate 242 of backboard 24 movably.Therefore, LED-backlit module 2 provided by the present invention also comprises the fixture 26 being connected to by bottom panel 232 and carrying on the back on substrate 242.Described fixture 26 has through the body of rod 261 of bottom panel 232 with back of the body substrate 242; Bottom panel 242 offers the conduit 2321 that the body of rod 261 is slided within it, to regulate bottom panel 232 and back of the body substrate 242 relative position along with the distance adjustment between side plate 241 and vertical panel 231.When this fixture 26 makes heat sink 23 mobile in cavity volume 243, heat sink 23 is still fixed on backboard 24, ensures the globality of whole LED-backlit module 2.
Further, the outside of the vertical panel 231 of heat sink 23 is provided with step datum hole 2311, the boss 2411 relative with described step datum hole 2311 is provided with inside the side plate 241 of backboard 24, elastic connecting component 25 one end is placed in step datum hole 2311, and the other end is sheathed on described boss 2411.Namely this elastic connecting component 25 is located between the boss 2411 of side plate 241 and the step datum hole 2311 of heat sink 23.Particularly, in the present embodiment, this elastic connecting component 25 comprises at least one spring.Therefore on the vertical panel 231 of heat sink 23, at least one step datum hole 2311 coordinated with this spring is provided with, the corresponding step datum hole 2311 of each spring.The side plate 241 of backboard 24 is also provided with at least one boss 2411 coordinate with spring, the corresponding boss 2411 of each spring.In the present embodiment, every side is provided with two springs, is therefore altogether provided with four springs in whole LED-backlit module 2.Namely the heat sink 23 of every side is provided with two step datum holes 2311, and on the side plate 241 of the backboard 24 of every side, correspondence is provided with two boss 2411.And one end of spring is located in the step datum hole 2311 of the vertical panel 231 of heat sink 23, the other end is sheathed on the boss 2411 of backboard 24.Namely one end of spring abuts mutually with the vertical panel 231 of heat sink 23, and the other end abuts mutually with the side plate 241 of backboard 24.Can the position relationship of light guide plate 21 and LED lamp bar 22 in dynamic adjustments backlight module by elastic connecting component 25 between backboard 24 and heat sink 23.Under the original state of installing, the spring in elastic connecting component 25 is in relaxed state, and the LED lamp bar 22 on the vertical panel 231 of now heat sink 23 touches the side of light guide plate 21.In the use procedure of LED-backlit module, light guide plate 21 is because be heated or expand after moisture absorption, in the expansion process of light guide plate 21, its horizontal length increases, therefore light guide plate 21 promotes LED lamp bar 22 and moves to the side plate of backboard 41, namely the vertical panel 231 of heat sink 23 moves to side plate 241 direction of backboard 24, and now spring is in compressive state.In light guide plate 21 expansion process, LED lamp bar 22 is close to the side of light guide plate 21 all the time, ensure that LED-backlit module 2 efficiently works all the time.And the length that this light guide plate 21 increases because of expansion is in the adjustable range 0 ~ 4mm of this elastic connecting component.Therefore can ensure that light guide plate 21 there will not be the phenomenon of warpage.And when LED-backlit module 2 operating temperature reduce or humidity reduce time, light guide plate 21 shrinks, and gets back to the state of initial assembling, now, spring on elastic connecting component 25 plays the effect of reset, pushes the vertical panel 231 of heat sink 23 to light guide plate 21.In a word, this elastic connecting component 25 ensure that in LED-backlit module 2, and light guide plate 21 and LED lamp bar remain in a minimum safe distance, make the utilization rate of light the highest.
Further, refer to Fig. 3, LED lamp bar 22 comprises a substrate 221, be located at LED on substrate 221 and bolster 222, substrate 221 is fixed on the vertical panel 231 of heat sink strip 23 and the opposite side of described light guide plate 21.Described bolster 222 is pasted on described substrate 221.This bolster is a kind of plastic material PC, and its thickness is at about 1.2mm, and this bolster is located between two adjacent LED, uses special glue to be bonded on substrate 221.The setting of this bolster 222 is mainly in order to protect the LED in LED lamp bar 22 can not break because of the expansion of light guide plate 21.Because the height of bolster 222 is greater than the height 0.1 ~ 0.3mm of described LED.In the present embodiment, the height of bolster 222 is 1mm, and the height of LED is 0.8mm; Therefore the height of bolster 222 is higher than the height 0.2mm of LED.When LED lamp bar 22 is close to light guide plate 21; first light guide plate 21 is touched by bolster 222; make the top of LED all the time and between light guide plate 21, have the distance of 0.2mm; the stress expanded when extending ensure that light guide plate 21 because can not directly act in LED; but act on bolster 222, thus play the effect of LED in protection LED lamp bar 22.
Further, refer to Fig. 4, in the present embodiment, the described body of rod 261 is screw 261, described conduit 2321 is for being opened in the elongated waist hole 2321 on bottom panel 232, screw 261 is through elongated waist hole 2321, and the back of the body substrate 242 of backboard 24 is provided with the through hole 2421 that can pass through for screw 26, is also provided with the erection column 2422 can fixed for screw 261 at described back of the body substrate 242 relative to the opposite side of described bottom panel 232.Because heat sink 23 receives the effect of elastic connecting component 25, certain scope of activities can be had in the horizontal direction relative to backboard 24.Therefore, be fixed on movably on the back of the body substrate 242 of backboard 24 at the bottom panel 232 of fin 23.And along the moving direction of heat sink 23 on bottom panel 232, namely the axis direction of elastic connecting component 25 is provided with elongated waist hole 2321, make hold-down screw 261 can be movable in elongated waist hole 2321.When light guide plate 21 expanded by heating, heat sink 23 moves to the side plate side of backboard 24, although now the bottom panel 232 of heat sink 23 is fixed on the back of the body substrate 242 of backboard 24, but screw 261 can be movable in elongated waist hole 2321, therefore heat sink 23 can be outer mobile in the horizontal direction in the limited field in elongated waist hole 2321.When light guide plate 21 shrinks, receive the effect of elastic connecting component 25, heat sink 23 is pushed to centre by spring and is close to light guide plate 21, and therefore the bottom panel 232 of light guide plate 23 moves inward in the horizontal direction.And backboard 24 is in order to hold-down screw 261, be also provided with erection column 2422 at the back side of backboard 24 to extend the connecting length with screw 261.Erection column 2422 is provided with and coordinates fixing internal thread with screw 261.Screw 261 is fixed on the back of the body substrate 242 of backboard 24 by erection column 2422.Be fixed on backboard 24 in order to what make that heat sink 23 can be more movable, be also provided with bullet pad 263 and plain cushion 262 between the head of screw 261 and the bottom panel 232 of heat sink 23, bullet pad 263 and plain cushion 262 are sheathed on screw 261.And in the present embodiment, this screw 261 is step machine tooth screw.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. there is the LED-backlit module of flexible adjustment device, it comprises light guide plate, be placed in the LED lamp bar of described light guide plate both sides and fix heat sink and the backboard of described LED lamp bar, described backboard comprises orthogonal back of the body substrate and side plate, described back of the body substrate and described side plate are surrounded by a cavity volume jointly, described heat sink is positioned at the cavity volume of described backboard, described heat sink comprises orthogonal vertical panel and bottom panel, vertical panel and bottom panel one-body molded, described bottom panel is connected to the fixture on described back of the body substrate, described fixture has the body of rod through described bottom panel and described back of the body substrate, described bottom panel offers the conduit that the described body of rod is slided within it, to regulate the relative position of described bottom panel and described back of the body substrate along with the distance adjustment between described side plate and described vertical panel, described LED lamp bar is fixed on the inner side of described vertical panel, the side plate of described backboard and the vertical panel of described heat sink facing, described heat sink is fixed on described back of the body substrate by described bottom panel, it is characterized in that, also elastic connecting component is provided with between the outside of the vertical panel of described heat sink and the side plate interior sides of described backboard, in order to regulate the distance between described side plate and described vertical panel, the described body of rod is screw, described conduit is the elongated waist hole be opened on described bottom panel, described screw is through described elongated waist hole, the back of the body substrate of described backboard is provided with the through hole that can pass through for described screw, is also provided with the erection column can fixed for described screw at described back of the body substrate relative to the opposite side of described bottom panel, also be provided with bullet pad and plain cushion between the head of described screw and the bottom panel of described heat sink, described bullet pad and described plain cushion are sheathed on described screw.
2. there is the LED-backlit module of flexible adjustment device as claimed in claim 1, it is characterized in that, the outside of the vertical panel of described heat sink is provided with step datum hole, the side plate interior sides of described backboard is provided with the boss relative with described step datum hole, described elastic connecting component one end is placed in described step datum hole, and the other end is sheathed on described boss.
3. there is the LED-backlit module of flexible adjustment device as claimed in claim 1 or 2, it is characterized in that, described elastic connecting component comprises at least one spring, and one end of described spring abuts mutually with the vertical panel of described heat sink, and the other end abuts mutually with the side plate of described backboard.
4. there is the LED-backlit module of flexible adjustment device as claimed in claim 1, it is characterized in that, described LED lamp bar comprises a substrate, be located at LED on described substrate and bolster, and described substrate is fixed on the vertical panel of described heat sink and the opposite side of described light guide plate.
5. have the LED-backlit module of flexible adjustment device as claimed in claim 4, it is characterized in that, the height of described bolster is greater than the height 0.1 ~ 0.3mm of described LED.
6. have the LED-backlit module of flexible adjustment device as claimed in claim 4, it is characterized in that, described bolster is pasted on described substrate.
7. have the LED-backlit module of flexible adjustment device as claimed in claim 1, it is characterized in that, described screw is step machine tooth screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310032855.8A CN103090275B (en) | 2013-01-28 | 2013-01-28 | There is the LED-backlit module of flexible adjustment device |
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| CN201310032855.8A CN103090275B (en) | 2013-01-28 | 2013-01-28 | There is the LED-backlit module of flexible adjustment device |
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| CN103090275B true CN103090275B (en) | 2015-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103615685B (en) * | 2013-11-28 | 2016-01-13 | 辅讯光电工业（苏州）有限公司 | Backlight module and display unit |
| CN104748017A (en) * | 2015-04-10 | 2015-07-01 | 北京京东方多媒体科技有限公司 | Backlight source and display device |
| CN105841043A (en) * | 2016-05-30 | 2016-08-10 | 上海九高节能技术股份有限公司 | Internal squeezing prevention type side-emitting LED panel light |
| CN206573825U (en) | 2017-03-30 | 2017-10-20 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN107193333B (en) * | 2017-06-19 | 2020-06-23 | 京东方科技集团股份有限公司 | Display device and display module thereof |
| CN111323964A (en) * | 2018-12-13 | 2020-06-23 | 深圳Tcl新技术有限公司 | Side-in type backlight module |
| CN109545083B (en) * | 2019-01-02 | 2020-12-25 | 高创(苏州)电子有限公司 | Backlight module and display device |
| CN110346974A (en) * | 2019-07-03 | 2019-10-18 | 江苏科森光电科技有限公司 | A kind of backlight module |
| CN113759602A (en) * | 2021-09-07 | 2021-12-07 | 京东方科技集团股份有限公司 | Backlight module, display device and display system |
| CN117234003B (en) * | 2023-09-04 | 2024-03-05 | 安徽赛时达显示科技有限公司 | Backlight module display screen with heat radiation structure |
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Effective date of registration: 20210709 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Development Zone, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |