CN101592819A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN101592819A CN101592819A CNA2008100987041A CN200810098704A CN101592819A CN 101592819 A CN101592819 A CN 101592819A CN A2008100987041 A CNA2008100987041 A CN A2008100987041A CN 200810098704 A CN200810098704 A CN 200810098704A CN 101592819 A CN101592819 A CN 101592819A
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- framework
- main body
- backlight module
- connecting portion
- load section
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Abstract
The present invention discloses a kind of backlight module, comprises a framework, a light guide plate, a light source and a flexible circuit board.Light guide plate is arranged in the framework.Flexible circuit board is arranged on framework and the light guide plate, comprises a main body, a light load section and a junction.The main body of part is bent, so that a coboundary of main body and a lower limb are disposed at a upside and a downside of framework respectively.The light load section is positioned at by the main body.Light load section carrying light source.Connecting portion has one first end and one second end.First end is connected in a centre portion on a base of light load section.Second end is connected in the lower limb of main body.Connecting portion is bent, and makes the light load section be disposed at the upside of framework, and makes light source be positioned at a side of light guide plate.
Description
Technical field
The present invention relates to a kind of backlight module, and particularly relate to a kind of backlight module that a mode with bending is arranged at the flexible circuit board on the framework that has.
Background technology
Along with the development of display technique, backlight module is applied in the liquid crystal indicator so that light source to be provided.Undersized backlight module comprises a light emitting diode, a flexible circuit board, a framework and a light guide plate.Light guide plate is arranged in the framework.Please refer to Figure 1A, it illustrates the side view that flexible circuit board is arranged at framework.With on the relative two sides that are arranged at framework 11, and colloid 20 coats between flexible circuit board 90 and the framework 11 by bending for flexible circuit board 90, with bonding flexible circuit board 90 and framework 11.Light emitting diode 70 is positioned at a side of light guide plate 50.When light emitting diode 70 was luminous, light can enter light guide plate 50.Light guide plate 50 utilizes its structure to change the direction that light is advanced.
Because flexible circuit board 90 is arranged on the framework 11 in the mode of bending, therefore, flexible circuit board 90 has the stress of resilience.Please refer to Figure 1B, it illustrates flexible circuit board among Figure 1A because of the synoptic diagram of resilience perk.After flexible circuit board 90 is upturned, make the position of light emitting diode 70 change accordingly.So, the light that light emitting diode 70 is sent has part can't inject in the light guide plate 50, makes the luminescence efficiency of backlight module 10 reduce.Even, after the light path deflection of the light that light emitting diode 70 is sent, also will make the luminous uniformity coefficient that reduces backlight module 10 reduce.
Though, be to seek full-bodied colloid 20 to strengthen the ability that flexible circuit board 90 adheres to framework 11 in the tradition.Yet the spreading area of colloid 20 is limited and seek full-bodied colloid 20 and often face situation about raising the cost.In addition, also have in the tradition and adopt the mode that adds a fixture to avoid flexible circuit board 90 resiliences, for example be increase extraly a framework (not illustrating) in flexible circuit board 90 outsides with fixing flexible circuit board 90, or temporarily with a clip (not illustrating) clamping flexible circuit board 90 so that flexible circuit board 90 is fixed on the framework 11.But the mode that adds fixture can improve manufacturing cost and man-hour, and if framework also can increase backlight module 10 in flexible circuit board 90 outsides integral thickness is set.Therefore, how to design and to reduce the situation of flexible circuit board, have influence on the luminescence efficiency and the luminous uniformity coefficient of backlight module with the offset of avoiding the light source setting, one of problem of making great efforts for industry because of the bending resilience.
Summary of the invention
The object of the present invention is to provide a kind of backlight module, it can reduce the situation of flexible circuit board because of the bending resilience, in addition, the present invention also can reduce the probability that the luminescence efficiency of backlight module reduces because of the flexible circuit board resilience, so that backlight module has good illumination efficiency and uniformity coefficient.
According to the present invention, a kind of backlight module is proposed, comprise a framework, a light guide plate, a light source and a flexible circuit board.Light guide plate is arranged in the framework.Flexible circuit board is arranged on framework and the light guide plate.Flexible circuit board comprises a main body, a light load section and a junction.The main body of part is bent, so that a coboundary of main body and a lower limb are disposed at a upside and a downside of framework respectively.The light load section is positioned at by the main body.Light load section carrying light source.Connecting portion has one first end and one second end.First end is connected in a centre portion on a base of light load section.Second end is connected in the lower limb of main body.Connecting portion is bent, and makes the light load section be disposed at the upside of framework, and makes light source be positioned at a side of light guide plate.
For foregoing of the present invention can be become apparent, a preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below:
Description of drawings
Figure 1A (prior art) illustrates the side view that flexible circuit board is arranged at framework;
Figure 1B (prior art) illustrates flexible circuit board among Figure 1A because of the synoptic diagram of resilience perk;
Fig. 2 illustrates the exploded view according to the backlight module of a preferred embodiment of the present invention;
Fig. 3 A illustrates the synoptic diagram of the flexible circuit board among Fig. 2;
Fig. 3 B illustrates flexible circuit board among Fig. 3 A and is arranged at synoptic diagram on the framework;
Fig. 4 illustrates the synoptic diagram of the flexible circuit board of another shape;
Fig. 5 illustrates the enlarged diagram of the part of the backlight module among Fig. 3 B;
Fig. 6 A illustrates the partial schematic diagram of the framework among Fig. 5;
When Fig. 6 B illustrates flexible circuit board and is arranged on the framework among Fig. 6 A, along the cut-open view of profile line 6B-6B; And
Fig. 7 illustrates the synoptic diagram in order to the framework that the flexible circuit board among Fig. 4 is set.
The main element symbol description
10,100: backlight module
11,110,110 ': framework
20: colloid
50,150: light guide plate
70: light emitting diode
90,190,190 ': flexible circuit board
110a: upside
110b: downside
110c: outstanding post
111: extended structure
111a: space
111b: bulge-structure
130: optical thin film
170: light source
191,191 ': main body
191a: coboundary
191b: lower limb
191c: main body extension
193,193 ': the light load section
193b: base
193c: hole
193B1,193B2: side
195,195 ': connecting portion
195a: first end
195b: second end
195c: breach
111a ': groove
B1, B2: border
W1, W2: width
Embodiment
Please refer to Fig. 2, it illustrates the exploded view according to the backlight module of a preferred embodiment of the present invention.Backlight module 100 comprises a framework 110, a light guide plate 150, a light source 170 and a flexible circuit board 190.Light guide plate 150 is arranged in the framework 110.Flexible circuit board 190 is arranged on framework 110 and the light guide plate 150.
Please be simultaneously with reference to Fig. 3 A and Fig. 3 B, Fig. 3 A illustrates the synoptic diagram of the flexible circuit board among Fig. 2, and Fig. 3 B illustrates flexible circuit board among Fig. 3 A and is arranged at synoptic diagram on the framework.Flexible circuit board 190 comprises a main body 191, a light load section 193 and a junction 195.The main body 191 of part is bent, so that a coboundary 191a of main body 191 and a lower limb 191b are disposed at a upside 110a and a downside 110b of framework 110 respectively.It is other that light load section 193 is positioned at main body 191.Light load section 193 carrying light sources 170 thereunder (illustrate with dotted line in Fig. 3 B), and light source 170 for example is a light emitting diode.Connecting portion 195 has one first end 195a and one second end 195b.The first end 195a is connected in the centre portion of a base 193b of light load section 193.The second end 195b is connected in the lower limb 191b of main body 191.Connecting portion 195 is bent, and makes light load section 193 be disposed at the upside 110a of framework 110, and makes light source 170 be positioned at a side of light guide plate 150 (shown in Fig. 3 B).
When light source 170 was luminous, light can enter light guide plate 150.Light guide plate 150 utilizes its structure to come the direct of travel of directing light.So, a display panel that is provided with backlight module 100 can utilize light to come display frame.
Now the backlight module 100 to present embodiment further specifies as follows.As shown in Figure 2, backlight module 100 for example is more to comprise at least one optical thin film 130, for example is a diffusion barrier, is arranged in the framework 110.Light guide plate 150 is arranged on the optical thin film 130, and light guide plate 150 directing lights are advanced toward the direction of optical thin film 130 (for example being a diffusion barrier).Optical thin film 130 homogenising are by its light, to allow display panel utilize light to come display frame.
The connecting portion 195 of flexible circuit board 190 has two breach 195c as shown in Figure 3A, and these a little breach 195c are being adjacent to the first end 195a, and these a little breach 195c are arranged at the relative dual-side of connecting portion 195.Preferably, these a little breach 195c are positioned at the first end 195a, and the contour shape of breach 195c is an arc.So, when connecting portion 195 during by bending, can effectively reduce the bounce that connecting portion 195 is bestowed light load section 193, prevent that light load section 193 from upwarping and break away from framework 110, moreover, also can avoid stress concentrations to cause connecting portion 195 fractures in the first end 195a of connecting portion 195.
In addition, the shape of connecting portion 195 for example is a strip, and obliquely extends to connect a main body extension 191c and the light load section 193 that main body 191 is had.The lower limb 191b horizontal expansion of main body extension 191c autonomous agent 191.Certainly, the shape of the main body 191 of flexible circuit board 190 and connecting portion 195 is not to be confined to the shape shown in Fig. 3 A.Please refer to Fig. 4, it illustrates the synoptic diagram of the flexible circuit board of another shape.The connecting portion 195 ' of flexible circuit board 190 ' also can be L shaped, and main body 191 ' does not have main body extension 191c as shown in Figure 3A.
Shown in Fig. 3 B, light load section 193 for example is a corner that is disposed at framework 110, and is disposed on the framework 110 in the mode of colloid adhesion.Please refer to Fig. 5, it illustrates the enlarged diagram of the part of the backlight module among Fig. 3 B.As previously mentioned, the first end 195a of connecting portion 195 is connected in the centre portion of the base 193b of light load section 193, and the scope of this centre portion may be defined as between two boundary B 1 and B2.Preferably, when the width of the first end 195a of connecting portion 195 was W1, the distance of boundary B 1 and a side 193B1 of light load section 193 was essentially 1.2 times of W1.The distance of another border B2 of centre portion and the side 193B 1 of light load section 193 is essentially 4.2 times of W1.That is to say that the width W 2 of centre portion is 3 times of the first end 195a width W 1 of connecting portion 195.So, when connecting portion 195 is bent, be difficult for making light load section 193 resiliences.With the actual sample analysis, when the position that connecting portion 195 is connected in light load section 193 exceeded this centre portion, reflex action broke away from framework 110 than being easier to separate with the colloid of below in light load section 193.And when position that connecting portion 195 is connected in light load section 193 hereinto between during section, light load section 193 relatively is not easy to separate with the colloid of below.Therefore, present embodiment is connected in the scope of centre portion by the first end 195a that makes connecting portion 195, to reduce the probability that connecting portion 195 upwarps light load section 193.
Certainly, the side 193B2 that the scope of centre portion also can be its boundary B 2 and light load section 193 is in fact at a distance of the width W 1 of 1.2 times the first end 195a, and the side 193B2 of another border B1 of centre portion and light load section 193 4.2 times the width W 1 of the first end 195a in fact apart.
In addition, as shown in Figure 5, light load section 193 has a hole 193c, and the framework 110 of backlight module 100 has an outstanding post 110c.Hole 193c makes outstanding post 110c pass through hole 193c when being arranged on the framework 110 at flexible circuit board 190.So, but not only positioned light source supporting part 193 and more can further avoid light load section 193 to upwarp on framework 110.In addition, also can more utilize the mode that heat is melted outstanding post 110c to fix light load section 193, to reduce the chance of light load section 193 because of the turnover resilience.
Please refer to Fig. 6 A, it illustrates the partial schematic diagram of the framework among Fig. 5.Framework 110 has an extended structure 111, and extended structure 111 extends from the corner of framework 110, to form a space 111a between framework 110 and extended structure 111.In addition, extended structure 111 has a bulge-structure 111b.Bulge-structure 111b is positioned at the inwall of extended structure 111, and outstanding towards the direction of framework 110.As shown in Figure 5, the connecting portion 195 that is bent is contained among the 111a of space.Please refer to Fig. 6 B, when it illustrates flexible circuit board and is arranged on the framework among Fig. 6 A, along the cut-open view of profile line 6B-6B.Bulge-structure 111b props up connecting portion 195.By the setting of extended structure 111 and bulge-structure 111b thereof, but the connecting portion 195 of precompressed flexible circuit board 190 (as shown in Figure 5), to reduce the chance of light load section 193 (as shown in Figure 5) because of the stress resilience of the connecting portion 195 that bent.
The framework 110 that is illustrated among Fig. 6 A only is an example, has in this technical field to know that usually the knowledgeable should understand, the design of framework 110 can modify and adjust according to the practical application situation.Please refer to Fig. 7, it illustrates the synoptic diagram in order to the framework that the flexible circuit board among Fig. 4 is set.The connecting portion 195 ' of the flexible circuit board 190 ' among Fig. 4 is the L type.Therefore, framework 110 ' as shown in Figure 7 has a groove 111a '.The ccontaining connecting portion 195 ' that is bent of groove 111a '.
The disclosed backlight module of the above embodiment of the present invention, the connecting portion of its flexible circuit board is connected in the centre portion on the base of light load section.So, can reduce the chance that flexible circuit board allows the light load section have resilience to upwarp because of bending,, and make display panel have high image display quality so that backlight module has good illumination efficiency and good luminous uniformity coefficient.In addition, compare with traditional mode, the present invention more can reduce manufacturing cost and man-hour effectively.
In sum, though disclosed the present invention in conjunction with an above preferred embodiment, it is not in order to limit the present invention.Be familiar with this operator in the technical field of the invention, without departing from the spirit and scope of the present invention, can be used for a variety of modifications and variations.Therefore, protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (11)
1. backlight module comprises:
Framework;
Light guide plate is arranged in this framework;
Light source; And
Flexible circuit board is arranged on this framework and this light guide plate, and this flexible circuit board comprises:
Main body, this main body of part is bent, so that a coboundary of this main body and a lower limb are disposed at a upside and a downside of this framework respectively;
The light load section is positioned at by this main body, and this light source is carried in this light load section; And
Connecting portion, have one first end and one second end, this first end is connected in a centre portion on a base of this light load section, this second end is connected in this lower limb of this main body, this connecting portion is bent, make this light load section be disposed at this upside of this framework, and make this light source be positioned at a side of this light guide plate.
2. backlight module as claimed in claim 1, wherein a side of a border of this centre portion and this light load section is in fact at a distance of the width of this first end of 1.2 times, and another border of this centre portion and this side of this light load section be 4.2 times the width of this first end in fact apart.
3. backlight module as claimed in claim 1, wherein this connecting portion has two breach, and those breach are positioned at this first end in fact, and those breach are arranged at the relative dual-side of this connecting portion.
4. backlight module as claimed in claim 3, wherein the contour shape of those breach is an arc.
5. backlight module as claimed in claim 1, wherein the shape of this connecting portion is essentially the L font.
6. backlight module as claimed in claim 1, wherein this connecting portion is a strip, and obliquely extends to connect this main body and this light load section.
7. backlight module as claimed in claim 1, wherein this main body has a main body extension, and this main body extension is from this lower limb horizontal expansion of this main body, and this of this connecting portion second end is connected in this main body extension.
8. backlight module as claimed in claim 1, wherein this light load section is disposed at a corner of this framework in the mode of colloid adhesion.
9. backlight module as claimed in claim 1, this framework tool one extended structure wherein, this extended structure extends from a corner of this framework, and to form a space between this framework and this extended structure, this this connecting portion that is bent is contained in this space.
10. backlight module as claimed in claim 9, wherein this extended structure has a bulge-structure, and this bulge-structure is positioned at the inwall of this extended structure, and outstanding towards the direction of this framework, and this bulge-structure props up this connecting portion.
11. backlight module as claimed in claim 1, wherein this framework has a groove, ccontaining this connecting portion that is bent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100987041A CN101592819B (en) | 2008-05-30 | 2008-05-30 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100987041A CN101592819B (en) | 2008-05-30 | 2008-05-30 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101592819A true CN101592819A (en) | 2009-12-02 |
| CN101592819B CN101592819B (en) | 2010-10-13 |
Family
ID=41407555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100987041A Expired - Fee Related CN101592819B (en) | 2008-05-30 | 2008-05-30 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101592819B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389606A (en) * | 2012-05-07 | 2013-11-13 | 奥林巴斯映像株式会社 | Pick-up device |
| WO2016023300A1 (en) * | 2014-08-12 | 2016-02-18 | 深圳市华星光电技术有限公司 | Backlight module back plate, backlight module and liquid crystal display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353233C (en) * | 2005-08-02 | 2007-12-05 | 友达光电股份有限公司 | Optical module and positioning frame therein |
| JP5142499B2 (en) * | 2006-08-18 | 2013-02-13 | 株式会社ジャパンディスプレイイースト | Liquid crystal display |
| KR100786479B1 (en) * | 2006-09-22 | 2007-12-17 | 삼성에스디아이 주식회사 | Flat panel display device and portable display appratus using the same |
| CN100543547C (en) * | 2006-11-08 | 2009-09-23 | 群康科技(深圳)有限公司 | Module backlight and liquid crystal indicator |
-
2008
- 2008-05-30 CN CN2008100987041A patent/CN101592819B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389606A (en) * | 2012-05-07 | 2013-11-13 | 奥林巴斯映像株式会社 | Pick-up device |
| WO2016023300A1 (en) * | 2014-08-12 | 2016-02-18 | 深圳市华星光电技术有限公司 | Backlight module back plate, backlight module and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101592819B (en) | 2010-10-13 |
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Granted publication date: 20101013 Termination date: 20160530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |