CN102927498A

CN102927498A - Backlight module

Info

Publication number: CN102927498A
Application number: CN2012103237560A
Authority: CN
Inventors: 陈明伦; 谢坤宏
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2012-06-01
Filing date: 2012-09-04
Publication date: 2013-02-13
Anticipated expiration: 2032-09-04
Also published as: TW201350991A; TWI479238B; CN102927498B

Abstract

A backlight module comprises: a plurality of light emitting elements, a frame and a plurality of light guide rods; the frame comprises a main body part and a reflecting part, an accommodating space is formed between the main body part and the reflecting part so as to arrange a plurality of light-emitting elements, and the reflecting part is connected with the main body part and extends towards the plurality of light-emitting elements in an inclined way; one end of each light guide rod is positioned at the side of each light emitting element, and the reflecting part faces the light guide rods.

Description

Backlight module

Technical field

The present invention relates to a kind of backlight module, particularly a kind of backlight module of display floater.

Background technology

General liquid crystal display mainly is to utilize liquid crystal panel (LCD panel) to show, because liquid crystal panel belongs to the display floater of non-self-luminosity, therefore must supply brightness sufficient light source with being evenly distributed with backlight module, just can make the normal show image of liquid crystal panel.General straight-down negative (direct type) backlight module is directly facing to diffuser plate position projection source by a plurality of LED on the substrate, and, form the mixed light space of visual luminous zone between substrate and the diffuser plate, the position that each LED arranges on the substrate, must be that the scope that each LED throws meets on the area that is evenly distributed in diffuser plate, therefore generally the mixed light space width can be strengthened, broaden, so that the LED projection distance is long and the light source effect of maximum magnitude, be reduced under the effect of LED quantity and can be incident upon on the diffuser plate the effect of wide scope, yet, also therefore cause the integral thickness of liquid crystal display to broaden.

Therefore, for making liquid crystal display towards more slimming, the width in above-mentioned mixed light space is necessary relative reduction, shortening then, generally so that more LED quantity to be set, utilize a plurality of LED dense distribution and be incident upon on the maximum area of diffuser plate and the scope and solve, but the relative cost that causes liquid crystal display improves, so, how to solve these a little problems and be the instant problem of relevant dealer of affiliated technical field.

Summary of the invention

In view of this, the present invention proposes a kind of backlight module, comprises: a plurality of light-emitting components, framework and a plurality of lamp guide; Wherein, framework comprises body and reflecting part, forms accommodation space between body and the reflecting part so that a plurality of light-emitting components to be set, and reflecting part is connected in body, and tilts to extend towards a plurality of light-emitting components; A plurality of lamp guide one ends are positioned at the side of a plurality of light-emitting components, and wherein, reflecting part is towards a plurality of lamp guides.

In the embodiments of the invention, backlight module covers the blanking bar part by the inclined design of framework, and with the setting of light-emitting component and lamp guide, substitutes the illumination effect of cold cathode fluorescent lamp pipe.In addition, the present invention can reduce the height in mixed light space by the setting of lamp guide, effectively reduce the thickness of backlight module and reach the purpose of slimming, and the light-emitting component that the present invention can effectively reduce quantity reaches the purpose that reduces cost.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Description of drawings

Fig. 1 is the partial schematic sectional view of the first embodiment of the present invention;

Fig. 2 is the local appearance schematic diagram of the first embodiment of the present invention;

Fig. 3 is the local schematic top plan view of the first embodiment of the present invention;

Fig. 4 A is the schematic cross-section () of lamp guide of the present invention;

Fig. 4 B is the schematic cross-section (two) of lamp guide of the present invention;

Fig. 4 C is the schematic cross-section (three) of lamp guide of the present invention;

Fig. 4 D is the schematic cross-section (four) of lamp guide of the present invention;

Fig. 4 E is the schematic cross-section (five) of lamp guide of the present invention;

Fig. 5 is the partial schematic sectional view of luminance of the present invention;

Fig. 6 is whole schematic side view of the present invention;

Fig. 7 is bright dipping peak-data figure of the present invention;

Fig. 8 is the partial schematic diagram of light source module of the present invention and lamp guide;

Fig. 9 is the optical module of the second embodiment of the present invention and the partial schematic diagram of lamp guide.

Wherein, Reference numeral

1 ... .... backlight module

3 ... .... light source module

31.......... substrate

32.......... supporting seat

33.......... light-emitting component

5 ... .... framework

51.......... body

511......... the first plate

512......... the second plate

513......... supporting part

52.......... reflecting part

521......... breach

53.......... accommodation space

6 ... .... back of the body lid

61.......... support member

62.......... reflecting element

7 ... .... lamp guide

71.......... exiting surface

72.......... micro-structural

73.......... opening

8 ... .... holder

81.......... reflector layer

9 ... .... optical module

91.......... diffuser plate

911......... micro-structural

L1/L2........ spacing

D ... .... length

D/g......... distance

θ 1/ θ 2....... angle

X ... .... the blanking bar zone

The specific embodiment

Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done concrete description:

See also Fig. 1, Fig. 2 and Fig. 3, the first embodiment of the present invention.Fig. 1 is partial schematic sectional view, and Fig. 2 is the local appearance schematic diagram, and Fig. 3 is local schematic top plan view.

As shown in Figures 1 and 2, the backlight module in first embodiment of the invention 1 comprises: a plurality of light source modules 3, framework 5 and a plurality of lamp guide 7.

Light source module 3 mainly can be comprised of substrate 31, supporting seat 32 and light-emitting component 33, wherein, light-emitting component 33 is welded on the substrate 31, substrate 31 is positioned on the supporting seat 32, and, supporting seat 32 optional usefulness have the made heat radiation fin structure of material of high heat-conduction coefficient, when the dismounting of user's wish, when changing light-emitting component 33, only need tip-off light-emitting component 33 or removal light-emitting component 33 and substrate 31, bracing frame 32 is not changed, so that the operation of dismounting, replacing light-emitting component 33 and substrate 31 is more easy.At this, above stated specification only is that the present invention is non-as limit for example about the structure of light source module 3, and in certain embodiments, light source module 3 can only be comprised of substrate 31 and light-emitting component 33, or is only to have light-emitting component 33.

Framework 5 mainly can be comprised of body 51 and reflecting part 52, wherein, body 51 is by being comprised of the first plate 511 and the second plate 512 that link to each other, wherein, the first plate 511 is vertically connected in fact the second plate 512, and its cross section generally is L font type, and, in certain embodiments, but the function of the second plate 512 cremasteric reflex light.In addition, the second plate 512 is provided with the supporting part 513 that is the groove shape in the end, in order to optical module 9(for example diffusion sheet or other blooming pieces to be set).One end of reflecting part 52 is connected in body 51, therefore can form accommodation space 53 between body 51 and reflecting part 52, in order to a plurality of light source modules 3 to be set.In the present embodiment, one end of reflecting part 52 is connected in the supporting part 513 of the second plate 512 ends, the setting party of the other end and the first plate 511 is to extending in the same way, and, reflecting part 52 is connected supporting part 513 places with spacing between the first plate 511 by reflecting part 52 to be reduced gradually towards the other end, in other words, an end of reflecting part 52 connection supporting parts 513 and the spacing between the first plate 511 are greater than the spacing between the other end and the first plate 511.Above stated specification only is that the present invention is non-as limit for example about the structure of framework 5, and in certain embodiments, framework 5 does not arrange supporting part 513, and an end of reflecting part 52 is directly connected in the second plate 512.

Lamp guide 7 is the pipe fitting of strip, and can be made by materials such as glass or plastic cement.At this, reflecting part 52 is provided with breach 521(as shown in Figure 2), therefore, an end of lamp guide 7 can pass reflecting part 52 via breach 521 and be positioned at the side of light-emitting component 33, so that the incidence surface of lamp guide 7 is on the projecting direction that is positioned at light-emitting component 33.

Please consult again Fig. 1 and Fig. 3, the second plate 512 of body 51 is near form the regional X of blanking bar between the end (reflecting part 52 is not connected an end of supporting part 513) of an end of optical modules 9 and reflecting part 52 owing to brilliant degree is lower, because the reflecting part 52 of framework 5 is to tilt to extend towards the first plate 511, therefore, it is seen in visual angle by the user, blanking bar zone X can be covered by the second plate 512 of body 51, uses and eliminates blanking bar zone X.

See also Fig. 4 A, lamp guide 7 cross sections are the rectangular pipe fitting of rectangle, have two relative exiting surfaces 71, and respectively at laying micro-structural 72 on each exiting surface 71, wherein, an exiting surface 71 is towards optical module 9, another exiting surface 71 towards the back of the body cover 6 or reflecting element 62(as shown in Figure 1).See also Fig. 4 B, lamp guide 7 also can only arrange micro-structural 72 in the one side towards optical module 9 as exiting surface 71.At this, micro-structural 72 can be printing ink or the concave point structure of prominent convex, or is other structures that can destroy the flatness of exiting surface 71.

In certain embodiments, see also Fig. 4 C, the cross section of lamp guide 7 is for being upside-down triangle shape, and lamp guide 7 arranges micro-structural 72 in the one side towards optical module 9 as exiting surface 71.

In certain embodiments, see also Fig. 4 D, the cross section of lamp guide 7 is for being hexagon, and lamp guide 7 is arranging respectively micro-structural 72 towards three of optical module 9 continuous planes as exiting surface 71.

In certain embodiments, see also Fig. 4 E, the cross section of lamp guide 7 is rounded, and lamp guide 7 arranges micro-structural 72 at the first half towards optical module 9 as exiting surface 71.

Aforementioned structure explanation about lamp guide 7 only is that the present invention is non-as limit for example, and lamp guide 7 can be the rectangular pipe fitting of arbitrary shape, and according to the actual design demand, lamp guide 7 can any part on its outer surface arrange micro-structural 72.

Please consult Fig. 1 and Fig. 2, backlight module 1 of the present invention also comprises the back of the body and cover 6 again, and the back of the body covers 6 bottoms that are backlight module 1, carries on the back to cover an end of 6 and be embedded in the accommodation space 53, and in its corner a plurality of light source modules 3 is set.In certain embodiments, can be provided with support member 61 on the lamp guide 7, make lamp guide 7 and the back of the body have spacing L2 between covering 6 in order to support lamp guide 7, and spacing L2 preferably be less than 2mm.In addition, the back of the body covers 6 and can be provided with reflecting element 62, in order to reflection ray.When the back of the body covers 6 when being provided with reflecting element 62, aforementioned intervals L2 is the distance between lamp guide 7 and the reflecting element 62.In addition, the distance between lamp guide 7 and the optical module 9 is spacing L1, and in the present embodiment, the spacing between lamp guide 7 and the optical module 9 is covered 6(or reflecting element 62 greater than lamp guide 7 and the back of the body) between spacing, in other words, spacing L1 preferably is greater than spacing L2.Aforementioned explanation about support member 61 only is that the present invention is non-as limit for example, and in certain embodiments, lamp guide 7 can be attached at the back of the body and cover 6 surface.

Such as Fig. 5, the micro-structural 72 of the most close reflecting part 52 and lamp guide 7 pass between the position of reflecting part 52 apart from g more than or equal to 1mm, in other words, the micro-structural 72 of the most close reflecting part 52 is at least 1mm apart from reflecting part 52; By this, eliminate tapping bright spot and the light consumption that reduces non-visual luminous zone.

Owing to the micro-structural 72 of lamp guide 7 can be destroyed total reflections, form opening 73 therefore in the meeting of the plane area on every side bright dipping of micro-structural 72 places or micro-structural 72, thereby in bright dipping place.And aperture opening ratio refer to into stereo microstructure projection in lamp guide 7 unit ares in the ratio on lamp guide 7 planes, aperture opening ratio is higher, easier bright dipping.The size of aperture opening ratio changes along with the distance between micro-structural 72 and the light-emitting component 33, and wherein, the distance between micro-structural 72 and the light-emitting component 33 is nearer, and its aperture opening ratio is larger, otherwise apart from healing person far away, aperture opening ratio is less; In other words, the distance between the aperture opening ratio of a plurality of micro-structurals 72 and a plurality of micro-structural 72, a plurality of light source module 3 is proportional.In certain embodiments, as shown in Figure 6, two ends of lamp guide 7 are coupled respectively light-emitting component 33 are set, and the aperture opening ratio of lamp guide 7 centre is large, and the aperture opening ratio of two ends is little.

See also Fig. 5 and Fig. 7, light-emitting component 33 is towards lamp guide 7 throw lights, guiding via lamp guide 7, penetrated by the opening 73 on its exiting surface 71, can formation angle theta 1 between the bright dipping peak value direction of its light and the exiting surface 71, the reflecting part 52 of inclination is angle theta 2 between the one side of the first plate 511 and lamp guide 7, wherein, angle theta 1 is greater than angle theta 2, and angle theta 2 preferably is greater than 90 °.

See also Fig. 1, Fig. 2 and Fig. 8, backlight module 1 of the present invention also comprises holder 8, in order to clamping light source module 3 and lamp guide 7, in the present embodiment, the part of holder 8 is positioned at accommodation space 53, and another part passes breach 521, holder 8 passes the structure of breach 521 only for giving an example, the present invention is non-as limit, and it can change according to the position of light source module 3, not necessarily can pass breach 521.At this, between lamp guide 7 and the light source module 3 apart from d for being less than or equal to 2mm, therefore, the length D of holder 8 preferably is greater than 2mm.In certain embodiments, holder 8 can select elastic material made, and the surface arranges reflector layer 81 in the inner, the light that is throwed to reflect light-emitting component 33.

See also Fig. 9, be the second embodiment of the present invention, be the partial schematic diagram of optical module and lamp guide.In the present embodiment, optical module 9 comprises diffuser plate 91, and the one side of diffuser plate 91 is towards lamp guide 7, and relative another side then is provided with micro-structural 911, so that spectrophotometric result to be provided.In certain embodiments, diffuser plate 91 is in also micro-structural can be set on the one side of lamp guide 7.At this, micro-structural 911 is the texture structure, and lamp guide 7 can be parallel to the long side direction of diffuser plate 91, also can be parallel to the short side direction (not shown) of diffuser plate 91.

In certain embodiments, micro-structural 911 can be one-dimentional structure, the setting party that for example plane prism or the curved surface prism of prominent convex, or be the structure of semicircle, semiellipse, aspheric surface semicircle, aspheric surface ellipse, lamp guide 7 can be parallel to micro-structural 911 to.

Certainly; the present invention also can have other various embodiments; in the situation that does 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

1. a backlight module is characterized in that, comprises:

A plurality of light-emitting components;

One framework comprises a body and a reflecting part, forms an accommodation space between this body and this reflecting part so that those light-emitting components to be set, and this reflecting part is connected in this body, and tilts to extend towards those light-emitting components; And

A plurality of lamp guides, an end is positioned at the side of those light-emitting components, and wherein, this reflecting part is towards those lamp guides.

2. backlight module according to claim 1 is characterized in that, this body comprises a supporting part, in order to an optical module to be set.

3. backlight module according to claim 2 is characterized in that, also comprises Yi Beigai, and an end is embedded in this accommodation space.

4. backlight module according to claim 3 is characterized in that, this back of the body lid comprises a plurality of support members, supports those lamp guides.

5. backlight module according to claim 3 is characterized in that, the spacing between those lamp guides and this back of the body lid is less than 2mm.

6. backlight module according to claim 5 is characterized in that, those lamp guides are attached at this back of the body and cover.

7. backlight module according to claim 5 is characterized in that, the spacing between those lamp guides and this optical module is greater than the spacing between those lamp guides and this back of the body lid.

8. according to the backlight module of claim described 3, it is characterized in that this back of the body lid comprises a reflecting element, reflects the light that those light-emitting components throw.

9. backlight module according to claim 2 is characterized in that, this optical module comprises a plurality of micro-structurals, the setting party of parallel those micro-structurals of those lamp guides to.

10. backlight module according to claim 1 is characterized in that, the distance between those lamp guides and those light-emitting components is less than or equal to 2mm.

11. backlight module according to claim 10 is characterized in that, also comprises a holder, this lamp guide of clamping.

12. backlight module according to claim 11 is characterized in that, this holder comprises a reflector layer, reflects the light that those light-emitting components throw.

13. backlight module according to claim 11 is characterized in that, the length of this holder is greater than 2mm.

14. backlight module according to claim 1 is characterized in that, each this lamp guide comprises at least one exiting surface and a plurality of micro-structural, and those micro-structurals are positioned at this exiting surface.

15. backlight module according to claim 14 is characterized in that, those micro-structurals and this lamp guide pass distance between the position of this reflecting part more than or equal to 1mm.

16. backlight module according to claim 14 is characterized in that, the distance between the aperture opening ratio of those micro-structurals and those micro-structurals, those light-emitting components is proportional.

17. backlight module according to claim 14 is characterized in that, the light that those light-emitting components throw is via the angle of the bright dipping peak value direction of those micro-structurals and this exiting surface angle greater than this reflecting part and this lamp guide.

18. backlight module according to claim 17 is characterized in that, the angle of this reflecting part and this lamp guide is greater than 90 °.