CN204387816U - A kind of backlight module - Google Patents
A kind of backlight module Download PDFInfo
- Publication number
- CN204387816U CN204387816U CN201420845428.1U CN201420845428U CN204387816U CN 204387816 U CN204387816 U CN 204387816U CN 201420845428 U CN201420845428 U CN 201420845428U CN 204387816 U CN204387816 U CN 204387816U
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- CN
- China
- Prior art keywords
- heat sink
- light guide
- guide plate
- led lamp
- lamp 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.)
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Abstract
The utility model provides a kind of backlight module, comprise light guide plate, be placed in the LED lamp bar of described light guide plate side, the heat sink of fixing described LED lamp bar and backboard, described heat sink comprises orthogonal side panel and bottom panel, described LED lamp bar is fixed on the side panel of described heat sink, the bottom panel of described heat sink is provided with at least one perforate, the corresponding verge of opening position of described backboard is provided with at least one boss, between the perforate and described backboard boss of described heat sink, elastomeric element is set, in order to regulate the distance between described light guide plate and described LED lamp bar.The utility model by arranging elastomeric element in backlight module, can keep the constant gap of light guide plate and LED lamp bar constant, avoids light guide plate to be heated and strikes LED lamp bar by during hygral expansion.
Description
Technical field
The utility model relates to field of liquid crystal display, specifically relates to a kind of backlight module.
Background technology
Liquid crystal display obtains extensive use with its excellent quality, and liquid crystal itself is not luminous, needs backlight module to provide light source.Backlight module is mainly divided into down straight aphototropism mode set and side entrance back module two kinds according to distribution of light sources position difference.Down straight aphototropism mode set is arranged on below liquid crystal panel by light source, and direct forming surface light source is supplied to liquid crystal panel.Side entrance back module is that light source is arranged on liquid crystal panel side, and line source is transformed to area source via light guide plate and is supplied to liquid crystal panel by light.Fig. 1 is the exploded view of side entrance back module, and side entrance back module generally includes glue frame 10, optical diaphragm group 70, light guide plate 40, the LED lamp bar 30 being placed in light guide plate 40 side, the heat sink 20 of fixed L ED lamp bar and backboard 50.Fig. 2 is side entrance back module local structure figure, LED lamp bar 30, heat sink 20 and light guide plate 40 are all fixed on backboard 50, suitable space D is left between light guide plate 40 incident side and LED lamp bar 30, if space D is excessive, light utilization efficiency can be reduced, cause backlight illumination not enough, when spacing is too little, light guide plate raises by temperature or large easily generation of humidity change is expanded thus strike LED lamp bar, LED lamp bar is caused to be damaged, and the length that light guide plate expands is when being greater than space D, easily there is warpage in light guide plate, thus affects picture display quality.
Utility model content
The purpose of this utility model is to solve the shortcoming that light guide plate in existing backlight module is heated or after moisture absorption, expansion strikes LED lamp bar, a kind of backlight module being provided with elastomeric element is provided, can regulate light guide plate in the longitudinal direction flexible, the distance maintained between light guide plate and LED lamp bar remains unchanged.
The utility model provides a kind of backlight module, comprise light guide plate, be placed in the LED lamp bar of described light guide plate side, the heat sink of fixing described LED lamp bar and backboard, described heat sink comprises orthogonal side panel and bottom panel, described LED lamp bar is fixed on the side panel of described heat sink, the bottom panel of described heat sink is provided with at least one perforate, the corresponding verge of opening position of described backboard is provided with at least one boss, between the perforate and described backboard boss of described heat sink, elastomeric element is set, in order to regulate the distance between described light guide plate and described LED lamp bar.Described elastomeric element comprises the pars contractilis being positioned at centre, the first fixed part being positioned at two ends and the second fixed part, and the first described fixed part is connected with the boss of described backboard, and the second described fixed part is connected with described heat sink.The bottom panel of described heat sink is provided with fastening screw in order to lightguide plate fixing.
The utility model is by arranging elastomeric element and fastening screw, and can regulate light guide plate in the longitudinal direction flexible, the distance maintained between light guide plate and LED lamp bar remains unchanged, and avoids light guide plate to be heated and clashes into LED lamp bar by hygral expansion.
Accompanying drawing explanation
Fig. 1 is the exploded view of side entrance back module;
Fig. 2 is side entrance back module local structure figure;
Fig. 3 is the utility model elastomeric element schematic diagram;
Fig. 4 is the utility model cooling plate structure schematic diagram;
Fig. 5 is the schematic diagram of the utility model fastening screw lightguide plate fixing;
Fig. 6 is the utility model back board structure schematic diagram;
Fig. 7 is the utility model elastomeric element assembling schematic diagram;
Fig. 8 A is the initial relaxed state schematic diagram of elastomeric element;
Fig. 8 B is elastomeric element compressive state schematic diagram;
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
Fig. 3 is the utility model elastomeric element schematic diagram, elastomeric element 80 comprises the first fixed part 81 and the second fixed part 82 being positioned at middle pars contractilis 83 and being positioned at two ends, the center of the first fixed part 81 and the second fixed part 82 is respectively equipped with the first screw 811 and the second screw 822, and the material of elastomeric element 80 can be metal or plastics.Fig. 4 is the utility model cooling plate structure schematic diagram, heat sink 90 comprises orthogonal side panel 902 and bottom panel 901, LED lamp bar 30 is fixed on the side panel 902 of heat sink 90, the bottom panel 901 of heat sink 90 is arranged a fastening screw 91, in order to lightguide plate fixing 40, the bottom panel 901 of heat sink 90 is also arranged at least one perforate 92 for holding elastomeric element 80, and setting locks screw 93 for elastomeric element 80 is fixed on heat sink 90.Fig. 5 is the schematic diagram of the utility model fastening screw lightguide plate fixing.Fig. 6 is the utility model back board structure schematic diagram, and backboard 100 corresponding heat sink perforate 92 marginal position shaping boss 101 from inside to outside bottom backboard 100, boss 101 is provided with the 3rd screw 102.Fig. 7 is the utility model elastomeric element assembling schematic diagram.Between the perforate 92 and the boss 101 of described backboard 100 of the bottom panel 901 of described heat sink 90, elastomeric element 80 is set, in order to regulate the distance between described light guide plate 40 and described LED lamp bar 30, first fixed part 81 of elastomeric element 80 is fixed on the boss 101 of backboard 100, and the second fixed part 82 of elastomeric element 80 locks screw 93 by the second screw 822 and heat sink 90 and is connected.When backlight module is assembled, by fastening screw 91 lightguide plate fixing 40 on heat sink 90, then by elastomeric element 80, heat sink 90, backboard 100 and light guide plate 40 are combined into an assembly.When light guide plate 40 does not expand, elastomeric element 80 is in initial relaxed state, as shown in Figure 8 A.When light guide plate 40 expanded by heating, outwards passed by overall lamp bar assembly by the fastening screw 91 on heat sink 90, now elastomeric element 80 compresses because of heat sink 90 displacement, as shown in Figure 8 B.The displacement of expanding because being absorbed light guide plate 40 by elastomeric element 80 makes the spacing of light guide plate 40 incident side and LED lamp bar do not changed, and avoids light guide plate 40 and strikes LED lamp bar.When temperature factor removes, light guide plate 40 is returned to original state, and elastomeric element 80 also returns to original state.Because the distance of LED lamp bar and light guide plate 40 incident side is constant before and after light guide plate 40 expansion simultaneously, the brightness of backlight module can remain consistent.
The utility model is by arranging elastomeric element and fastening screw, and can regulate light guide plate in the longitudinal direction flexible, the distance maintained between light guide plate and LED lamp bar remains unchanged, and avoids light guide plate to be heated and clashes into LED lamp bar by hygral expansion.
Claims (3)
1. a backlight module, comprise light guide plate, be placed in the LED lamp bar of described light guide plate side, the heat sink of fixing described LED lamp bar and backboard, described heat sink comprises orthogonal side panel and bottom panel, described LED lamp bar is fixed on the side panel of described heat sink, it is characterized in that: the bottom panel of described heat sink is provided with at least one perforate, the corresponding verge of opening position of described backboard is provided with at least one boss, between the perforate and described backboard boss of described heat sink, elastomeric element is set, in order to regulate the distance between described light guide plate and described LED lamp bar.
2. backlight module according to claim 1, it is characterized in that: described elastomeric element comprises the pars contractilis being positioned at centre, the first fixed part being positioned at two ends and the second fixed part, the first described fixed part is connected with the boss of described backboard, and the second described fixed part is connected with described heat sink.
3. backlight module according to claim 1 and 2, is characterized in that: the bottom panel of described heat sink is provided with fastening screw in order to lightguide plate fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845428.1U CN204387816U (en) | 2014-12-26 | 2014-12-26 | A kind of backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845428.1U CN204387816U (en) | 2014-12-26 | 2014-12-26 | A kind of backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204387816U true CN204387816U (en) | 2015-06-10 |
Family
ID=53360533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420845428.1U Active CN204387816U (en) | 2014-12-26 | 2014-12-26 | A kind of backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204387816U (en) |
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2014
- 2014-12-26 CN CN201420845428.1U patent/CN204387816U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |