CN201401697Y

CN201401697Y - Side light type backlight module

Info

Publication number: CN201401697Y
Application number: CN2009201367652U
Authority: CN
Inventors: 曾威扬; 简瑞权; 林文郁
Original assignee: CPTF Visual Display Fuzhou Ltd; Chunghwa Picture Tubes Ltd
Current assignee: CPTF Visual Display Fuzhou Ltd
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2010-02-10
Anticipated expiration: 2019-02-19

Abstract

The utility model relates to a side light type backlight module which comprises a framework, a light stripe and a backboard, wherein the frame is composed of a side stripe, a first extension portion and at least one positioning slot which is arranged on the first extension portion, the light stripe is composed of a base plate, a plurality of luminous assemblies and at least one positioning convexlug arranged on one side of the base plate, wherein the light stripe is embedded in the positioning slot through the positioning convex lug for being fixed in the side light type backlight module. Theutility model improves the light source utilization ratio of the side light type backlight module, and increases the reliability of the side light type backlight module.

Description

Side light type back light module

Technical field

The utility model is about a kind of side light type back light module, and is particularly a kind of with positioning tab and the fixing side light type back light module of striation of location slot.

Background technology

Backlight module (back light unit) is LCD (liquid crystal display, key LCD)

One of assembly is because liquid crystal panel (LCD panel) itself

The ability that tool is luminous, the function of backlight module promptly is well-off

With the light source that is evenly distributed, make normally show image of LCD.At present LCD be widely used in monitor, mobile computer, Tools such as position camera and projector are grown up and are dived

Electronic product, therefore drive backlight module and relevant The demand of assembly continues to grow up.Because characteristics such as light emitting diode has that volume is little, the life-span is long, power consumption is low, the reaction time is short and vibration strength is strong extensively are used on illumination or the backlight, replace conventional light source assemblies such as traditional osram lamp, fluorescent tube or cold-cathode tube.

When light emitting diode applies to lighting apparatus or backlight module, the board design that is fixedly light emitting diode is square or strip, known side light type back light module shown in the 1st figure, this side light type back light module is to comprise on the circuit board 12 that a plurality of light emitting diodes 10 are welded in a strip, form a striation (light bar), be cemented on the lampshade 16 by the back side of a double faced adhesive tape 14 in addition circuit board 12, fix this striation by this in this side light type back light module, light emitting diode 10 is over against a LGP 18, and will place the liquid crystal panel (figure does not show) of the light source guiding top of side direction via LGP 18.In general, for improving the utilization rate of light source, these light emitting diodes 10 can be as far as possible near LGP 18, yet, when backlight module carries out reliability (reliability) test, for example impact test (shock test) or vibration test (vibrationtest), if light emitting diode 10 too close LGPs 18, the strength of bump or vibration may cause light emitting diode 10 encapsulation to break, or the phenomenon that comes off of light emitting diode 10 encapsulation inside conductors, make the reliability thereby the decline of backlight module; In addition, when being fixed on circuit board 12 on the lampshade 16 with double faced adhesive tape 14 merely, may be because of the consumption of double faced adhesive tape 14 uneven or application of force inequality fixedly the time, it is wavy to make that the circuit board 12 of straight applying originally presents, light emitting diode 10 is also fixing with 18 relative positions of LGP; Therefore, improve the light source utilization rate and do not undermine reliability again, for make at present design with light emitting diode as the side light type back light module institute of light source must solution problem.

Summary of the invention

The purpose of this utility model is to improve the reliability of side light type back light module simultaneously into improving the light source utilization rate of side light type back light module.

For reaching above-mentioned purpose, the utility model provides a kind of side light type back light module, and it comprises a framework, a striation, a LGP and a backboard.Backboard comprises a side slat, one first extension and at least one location slot, first extension is vertical and side slat, and a side of first extension is to be connected with side slat, the location slot is a surface of being located at first extension, in addition, striation is to comprise the upper surface that a substrate and a plurality of luminescence component are arranged at substrate, and wherein one first side of substrate is provided with at least one positioning tab, and positioning tab is the location slot that correspondence is located at framework.The backboard of side light type back light module, it is one second side of being located at this striation, it comprises a flat board, an erection part and a storage tank, wherein an outside of erection part is to be close to side slat, and an inboard of erection part is a lower surface in the face of substrate, and storage tank is to connect flat board and erection part, and storage tank be used for ccontaining striation with the clamping striation between backboard and framework.

Side light type back light module of the present utility model is to utilize positioning tab and location slot to fix striation among side light type back light module, make luminescence component and LGP on the striation be kept a fixed range, guarantee the light source utilization rate of backlight module and improve whole reliability.

Description of drawings

The 1st figure illustrates a known side light type back light module.

The 2nd figure to the 4 figure are schematic diagrames of the backlight module that illustrated according to a preferred embodiment of the present utility model.

The 5th figure to the 8 figure are the schematic diagrames according to the backlight module that another preferred embodiment of the present utility model illustrated.

Attached major label description in figure:

10: light emitting diode

12: circuit board

14: double faced adhesive tape

16: lampshade

18: LGP

20,40: backlight module

22,42: framework

221,421: side slat

222,422: the first extensions

223,423: the second extensions

224,424: the location slot

24,44: striation

241,441: substrate

242,445: upper surface

243,442: luminescence component

244,446: the first sides

245: positioning tab

26,46: backboard

261,461: flat board

262: storage tank

263,462: erection part

28,48: LGP

30,50: reflecting plate

32,52: the lampshade sheet

34,54: thermal paste

443: the first positioning tabs

444: the second positioning tabs

246,447: the second sides

463: positioning recess

The specific embodiment

In the middle of specification and follow-up claim, used some vocabulary to censure specific assembly.The person with usual knowledge in their respective areas should understand, and same assembly may be called with different nouns by manufacturer.This specification and follow-up claim are not used as distinguishing the mode of assembly with the difference of title, but the benchmark that is used as distinguishing with the difference of assembly on function.Be to be an open term mentioned " comprising " in the middle of specification and the follow-up request item in the whole text, so should be construed to " comprise but be not limited to ".In addition, " electric connection " speech is to comprise any indirect means that are electrically connected that directly reach at this.Therefore, be electrically connected at one second device, then represent this first device can be directly connected in this second device, or be connected to this second device indirectly through other device or connection means if describe one first device in the literary composition.

The 2nd figure to the 4 figure are schematic diagrames of the backlight module 20 that illustrated according to a preferred embodiment of the present utility model.Please refer to the 2nd figure, backlight module 20 comprises a framework 22, a striation 24, a backboard 26 and a LGP 28.Backboard 26 is to utilize the locking of adhesive agent, screw or other feasible fixed form is connected in framework 22, and backboard 26 is to comprise a flat board 261, a storage tank 262 and an

erection part

263,28 of LGPs are to place dull and stereotyped 261 tops, storage tank 262 is to connect flat board 261 and erection part 263, and flat board 261 is vertical mutually with erection part 263.Please in the lump with reference to the 2nd figure and the 3rd figure; wherein; the 3rd figure is the structural representation for framework 22; framework 22 is to comprise a side slat 221; one first extension 222 and one second extension 223; side slat 221 is enclosed in the periphery of backlight module 20; to protect or to fix its inner other assembly that is provided with; for example striation 24 or LGP 28; one side of first extension 222 is to connect side slat 221; and first extension 222 is substantially perpendicular to side slat 221; in addition, second extension 223 is to connect first extension 222, and second extension 223 is also vertical mutually with first extension 222; it should be noted that; one surface of second extension 222 is provided with a plurality of location slot 224, and comparatively speaking, these location slots 224 are inboards of being located at framework 22.

Please in the lump with reference to the 2nd figure and the 4th figure, wherein, the 4th figure is the structural representation of striation 24.Shown in the 4th figure, striation 24 comprises a substrate 241, a printed circuit board (PCB) for example, one flexible circuit board (flexible printed circuit board) or other can provide the circuit board of the single or multiple lift of power supply connection, one upper surface 242 of substrate 241 is provided with a plurality of luminescence components 243, for example a plurality of light emitting diodes, these light emitting diodes are to utilize to cover crystalline substance, routing or other circuit connecting mode and substrate 241 or other circuit electrically connect, in addition, one first side 244 of substrate 241 is provided with a plurality of positioning tabs 245, be outwards to protrude from first side 244 of substrate 241 to extend the shape of these positioning tabs 245, the position, size is these location slots 224 that correspond respectively to framework 22.

Please refer again to the 2nd figure and the 4th figure, framework 22 and backboard 26 are when assembling, be to allow framework 22 last, backboard 26 under assemble both, make an outside of erection part 263 be close to the side slat 221 of framework 22, the back side of striation 24 is then faced in one inboard of erection part 263, these positioning tabs 245 on first side 244 of striation 24 are in these locating slots 224 that are embedded in respectively on first extension 222 of framework 22,246 of one second sides of striation 24 place the storage tank 262 of backboard 26, make striation 24 be fixed between framework 22 and the backboard 26, and these luminescence components 243 on the striation 24 keep suitable distance with LGP 28, to guarantee the light source utilization rate of backlight module 20; In addition, these luminescence components 243 on the striation 24 are the incidence surfaces that regard to LGP 28, the light that luminescence component 243 sends via LGP 28 and on blooming piece (figure do not show), provide panel (figure does not show) uniform source of light, wherein, above-mentioned blooming piece can be a diffuser plate, a brightness enhancement film (brightness enhancement sheet), polaroid (polarizer), wavelength phasic difference plate (retardation film), other is applicable to the film or the aforesaid combination of backlight module 20.In addition, one upper surface of the flat board 261 of backboard 26 is provided with a reflecting plate 30 in addition, and a lampshade sheet 32 is set in these

luminescence components

243 and 223 of second extensions, it is a kind of reflecting material, the light of feasible directive lampshade sheet 32 originally or backboard 26 is after lampshade sheet 32 or reflecting plate 30 surface reflections, enter the incidence surface of LGP 28, to improve whole light source utilization rate; Simultaneously, can attach a thermal paste 34 at striation 24 back sides, to help luminescence component 243 heat radiations, and because the thermal paste 34 between striation 24 and the erection part 263 is a flexible material and has elasticity, remove the space that to fill up between striation 24 and the erection part 263, when backlight module 20 carries out the reliability test, also can take into account the practicality in heat radiation and the assembling as cushion between the two.

Please refer to the 5th figure to the 7 figure, be backlight module schematic diagram according to another preferred embodiment of the present utility model illustrated.Shown in the 5th figure, backlight module 40 comprises a framework 42, a striation 44, a backboard 46 and a LGP 48, its middle frame 42 is to have identical structure with last preferred embodiment, framework 42 is to comprise a side slat 421, one first extension 422, one second extension 423 and a plurality of location slot 424, the position of each assembly of framework 42 and purposes are identical with last preferred embodiment, no longer praise in this and state.Please in the lump with reference to the structural representation of the backboard 46 of the 6th figure, backboard 46 is to comprise a flat board 461, an erection part 462 and a plurality of positioning recess 463, erection part 462 is that to connect dull and stereotyped 461 and substantially dull and stereotyped 461 be mutual vertical with erection part 462, and positioning recess 463 is to be located at dull and stereotyped 461, near dull and stereotyped 461 turning points that engage with erection part 462, in this preferred embodiment, positioning recess 463 is for running through the holes of flat board 461, but be not limited thereto, positioning recess 463 is can also be from dull and stereotyped 461 surfaces recessed and do not run through dull and stereotyped 461 recess; The structural representation of the striation 44 that is illustrated with reference to the 7th figure in the lump please, striation 44 comprises a substrate 441, a plurality of luminescence components 442, a plurality of first positioning tabs 443 and a plurality of second positioning tab 444, wherein a plurality of luminescence components 442 are upper surfaces 445 of being located at substrate 441, luminescence component 442 is to be electrically connected at substrate 441, in addition, one first side 446 of substrate 441 is provided with from first side 446 of substrate 441 outwards protrudes first positioning tab 443 that extends, and 447 settings of one second side of substrate 441 are outwards protruded second positioning tab 443 that extends from second side 447 of substrate 441, the shape of these first positioning tabs 443 wherein, the position, size is these location slots 424 that correspond respectively to framework 42, and the shape of these second positioning tabs 444, the position, size is then to be these positioning recess 463 that correspond respectively to backboard 46.

Please in the lump with reference to the 5th figure and the 8th figure, wherein the 8th figure is the upward view of backlight module 40.When assembling backlight module 40, be to allow framework 42 last, backboard 46 under assemble both, make an outside of erection part 462 be close to the side slat 421 of framework 42, the back side of striation 44 is then faced in one inboard of erection part 462, these first positioning tabs 443 of being located at first side 446 of striation 44 are in these locating slots 424 that are fastened on respectively on first extension 422 of framework 42, and these second positioning tabs 444 of being located at second side 447 of striation 44 are these positioning recess 424 that are fastened on backboard 46 respectively, and shown in the 8th figure, second positioning tab 444 is after fixing, be the back side that protrudes from flat board 461 slightly, and be not limited thereto, second positioning tab 444 is after fixing, also can flush or be hidden in dull and stereotyped 461 with dull and stereotyped 461 the back side, therefore, striation 44 can be by first positioning tab 443 locating slot 424 corresponding with it and second positioning tab 444 positioning recess 424 corresponding with it, keep a fixing distance with the LGP 48 of being located at dull and stereotyped 461 tops, these luminescence components 442 of striation 44 are the incidence surfaces in the face of LGP 48, simultaneously, for improving the light source utilization rate, between LGP 48 and dull and stereotyped 461, can settle a reflecting plate 50 in addition, at luminescence component 442 and 422 of second extensions lampshade sheet 52 is set, it is a kind of reflecting material, originally the light of directive lampshade sheet 52 or flat board 461 is after reflecting plate 50 or the 52 surface reflections of lampshade sheet, then enter the incidence surface of LGP 48, to improve the light source utilization rate.In addition, can attach a thermal paste 54 at striation 44 back sides, to help luminescence component 442 heat radiations, and because the thermal paste 54 between striation 44 and the erection part 462 is a flexible material and has elasticity, remove the space that to fill up between striation 44 and the erection part 462, when backlight module 40 carries out the reliability test, also can take into account the practicality in heat radiation and the assembling as cushion between the two.

In sum, the utility model provides the side light type back light module of a kind of fixedly striation and LGP spacing, when assembling is the attaching clamp that utilizes the substrate both sides of striation, combine with the location slot of framework or the positioning recess of backboard respectively, make that luminescence component and the LGP on the striation kept a suitable distance; In addition, the positioning recess of being located at backboard is not limited to be located at flat board, can be located at the storage tank bottom of backboard, to assist fixedly striation; In addition, be located at the radiating efficiency that thermal paste between striation and backboard not only can improve backlight module, also can be as the cushion between striation and backboard, to improve the reliability of backlight module; Simultaneously, backlight module assembleability of the present utility model is good, and striation the time can unload from backboard or framework if necessary in assembling, re-assemblies once more, therefore can reduce the fraction defective of product.

The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims

1. side light type back light module is characterized in that comprising:

One framework, this framework comprises:

One side slat;

One first extension is perpendicular to this side slat, and a side of this first extension is to be connected with this side slat; And

At least one location slot is located at a surface of this first extension;

One striation, it comprises:

One substrate, one first side of this substrate is provided with at least one positioning tab, and this positioning tab embeds this location slot of this framework;

A plurality of luminescence components are arranged at a upper surface of this substrate;

One backboard is to be located at one second side of this striation and to link with this framework, and this backboard comprises:

One flat board;

One erection part, an outside of this erection part is to be close to this side slat, and an inboard of this erection part is a lower surface in the face of this substrate; And

One storage tank connects this flat board and this erection part, this storage tank be used for ccontaining this striation with this striation of clamping between this backboard and this framework; And

One LGP is located on this flat board.

2. side light type back light module according to claim 1 is characterized in that: other comprises a reflecting plate, and these luminescence components of being located at described striation between this flat board and this LGP are incidence surfaces of being located at this LGP.

3. side light type back light module according to claim 1 is characterized in that: wherein this framework comprises one second extension in addition, be to connect this first extension, and substantially perpendicular to this first extension.

4. side light type back light module according to claim 3 is characterized in that: other comprises a lampshade sheet, and it is a reflecting material, and this lampshade sheet is located between these luminescence components and this second extension.

5. side light type back light module according to claim 1 is characterized in that: other comprises a thermal paste and is located between this erection part of this substrate of this striation and this backboard.

6. side light type back light module according to claim 1 is characterized in that: described luminescence component is to be a light emitting diode.

7. side light type back light module is characterized in that comprising:

One framework, this framework comprises:

One side slat;

One first extension be vertical and this side slat, and a side of this first extension is to be connected with this side slat; And

At least one location slot is located at a surface of this first extension;

One striation, it comprises:

One substrate, one first side of this substrate is provided with at least one first positioning tab, and this first positioning tab is this location slot that embeds this framework, and one second side of this substrate is provided with at least one second positioning tab;

One backboard is located at one second side of this striation and is linked with this framework, and this backboard comprises:

One flat board;

At least one positioning recess is located at this flat board, and this second positioning tab embeds this second positioning recess; And a LGP, be located on this flat board.

8. side light type back light module according to claim 7 is characterized in that: other comprises a reflecting plate, is located between this flat board and this LGP; These luminescence components of described striation are incidence surfaces of being located at this LGP; Described framework comprises one second extension in addition, is to connect this first extension, and substantially perpendicular to this first extension.

9. side light type back light module according to claim 8 is characterized in that: other comprises a lampshade sheet, and it is a reflecting material, and this lampshade sheet is located between these luminescence components and this second extension.

10. side light type back light module according to claim 7 is characterized in that: other comprises a thermal paste and is located between this erection part of this substrate of this striation and this backboard;

Wherein respectively this luminescence component is to be a light emitting diode.