CN102352985B - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN102352985B CN102352985B CN201110217465.9A CN201110217465A CN102352985B CN 102352985 B CN102352985 B CN 102352985B CN 201110217465 A CN201110217465 A CN 201110217465A CN 102352985 B CN102352985 B CN 102352985B
- Authority
- CN
- China
- Prior art keywords
- inwall
- guide plate
- light guide
- bolster
- backlight module
- 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.)
- Expired - Fee Related
Links
- 230000004308 accommodation Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Abstract
The invention discloses a backlight module, which comprises a back plate, a plurality of light emitting diodes, a light guide plate, at least one positioning piece and a plurality of first buffer pieces. The back plate is provided with four inner walls, and the four inner walls enclose an accommodating space. The light emitting diode is arranged on one inner wall, and the light guide plate is arranged in the accommodating space. The light guide plate has a light incident surface facing the inner wall on which the light emitting diodes are arranged. The positioning piece is arranged in the accommodating space and is positioned between the light guide plate and the inner wall provided with the light emitting diode. The first buffer parts are respectively arranged between the light guide plate and the inner wall which is positioned at the other side relative to the light emitting diode and is adjacent to the corner. The rigidity of the first buffer piece is smaller than that of the positioning piece.
Description
Technical field
The present invention relates to a kind of backlight module, and particularly relate to a kind of light guide plate of avoiding because of the backlight module of light source of wounding that expands.
Background technology
Liquid crystal display (liquid crystal display, LCD) is mainly made up of a liquid crystal panel and a backlight module.It should be noted that because the liquid crystal injecting in liquid crystal panel itself can be not luminous, therefore, the area source that must see through backlight module provides is lighted liquid crystal panel, so that liquid crystal display reaches the effect of demonstration.Hence one can see that, and backlight module is being played the part of considerable role in liquid crystal display.
Backlight module can be divided into direct type backlight module and side incident backlight module according to the allocation position of its light source.With side incident backlight module, because current display module is all towards the trend development of slimming, therefore also slimming thereupon of the thickness of light guide plate.But, due to light guide plate easily because of moisture absorption or be heated and expand, therefore how to avoid striking light source after light guide plate prolonged expansion and cause light source to damage, or thin light guide panel is out of shape because of the not enough lateral compression that is subject to other elements after being heated of physical strength, be the problem of desiring most ardently at present solution.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of backlight module, its light source can avoid sustaining damage in the time of light guide plate prolonged expansion.
The present invention proposes a kind of backlight module, comprises backboard, multiple light emitting diode, light guide plate, at least one keeper and multiple the first bolster.Backboard has the first inwall, the second inwall, the 3rd inwall and the 4th inwall, wherein the first inwall is with respect to the second inwall, the 3rd inwall is with respect to the 4th inwall, and the 3rd inwall and the second inwall intersect at the first corner, and the 4th inwall and the second inwall intersect at the second corner.And the first inwall, the second inwall, the 3rd inwall and the 4th inwall surround an accommodation space.
These light emitting diodes are to be disposed on the first inwall, and light guide plate is to be disposed in accommodation space.And light guide plate has the incidence surface with respect to the first inwall.Keeper is to be arranged in accommodation space, and between light guide plate and the first inwall.These first bolsters are to be disposed at respectively between light guide plate and the second inwall, and contiguous the first corner and the second corner.Wherein, the rigidity of the first bolster is less than the rigidity of keeper.
In one embodiment of this invention, above-mentioned backlight module more comprises multiple the second bolsters, and these second bolsters are to be configured in respectively between the 3rd inwall and the 4th inwall of light guide plate and backboard, and contiguous above-mentioned the first corner and the second corner.And the rigidity of these the second bolsters is less than the rigidity of above-mentioned keeper.
In one embodiment of this invention, the first bolster and second bolster in contiguous above-mentioned the first corner are connected with each other, and the first bolster and second bolster in contiguous above-mentioned the second corner are connected with each other.
In one embodiment of this invention, the first bolster and second bolster in contiguous above-mentioned the first corner are formed in one, and the first bolster and second bolster in contiguous above-mentioned the second corner are formed in one.
In one embodiment of this invention, above-mentioned each the first bolster comprises body and segment difference section, and segment difference section is between body and above-mentioned light guide plate.
In one embodiment of this invention, above-mentioned each the first bolster has first surface, and above-mentioned light guide plate has exiting surface, and the first surface of the first bolster is roughly parallel to exiting surface, and first surface has at least one groove.
In one embodiment of this invention, above-mentioned backlight module more comprises circuit board and connector.Circuit board is attached on the first inwall of backboard, and above-mentioned these light emitting diodes are disposed on circuit board and with it and are electrically connected.Connector is be disposed on circuit board and be connected to light emitting diode.And connector is between light guide plate and circuit board.
In one embodiment of this invention, above-mentioned keeper comprises sheet metal, is arranged between above-mentioned connector and light guide plate.
In one embodiment of this invention, the corner of contiguous the first inwall of above-mentioned light guide plate has breach, and so far breach and between light guide plate and the 3rd inwall or the 4th inwall of above-mentioned keeper correspondence.
Backlight module of the present invention is the location that the keeper different by rigidity and bolster complete light guide plate, and the keeper that rigidity is larger is between light guide plate and light source, therefore can avoid light guide plate to clash into light source in the time of moisture absorption or expanded by heating and cause the damage of light guide plate or light source, also can avoid light guide plate in the time doing impulse test, wound light source and light guide plate.The acting force that rigidity can be bestowed in response to light guide plate when light guide plate moisture absorption or the expanded by heating compared with little bolster and crimp, to avoid light guide plate to be out of shape because being subject to lateral compression power in the time expanding.
For above and other object of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
Fig. 1 be one embodiment of the invention a kind of backlight module on look schematic diagram;
Fig. 2 is the side view of the backlight module of Fig. 1;
Fig. 3 be another embodiment of the present invention a kind of backlight module on look schematic diagram.
Main element description of reference numerals
100: backlight module
110: backboard
111: the first inwalls
112: the second inwalls
113: the three inwalls
114: the four inwalls
115: accommodation space
120: light emitting diode
122: circuit board
124: connector
130: light guide plate
132: incidence surface
134: exiting surface
136: breach
140: keeper
150: the first bolsters
152,162: body
154,164: segment difference section
155,156,166: surface
157,167: groove
160: the second bolsters
170: glue frame
C1: the first corner
C2: the second corner
Embodiment
Fig. 1 be one embodiment of the invention a kind of backlight module on look schematic diagram, Fig. 2 is the side view of the backlight module of Fig. 1.Please also refer to Fig. 1, backlight module 100 comprises backboard 110, multiple light emitting diode 120, light guide plate 130, at least one keeper 140 and multiple the first bolster 150.Backboard 110 has the first inwall 111, the second inwall 112, the 3rd inwall 113 and the 4th inwall 114, wherein the first inwall 111 is with respect to the second inwall 112, the 3rd inwall 113 is with respect to the 4th inwall 114, and the 3rd inwall 113 and the second inwall 112 intersect at the first corner C1, the 4th inwall 114 and the second inwall 112 intersect at the second corner C2.And the first inwall 111, the second inwall 112, the 3rd inwall 113 and the 4th inwall 114 surround an accommodation space 115.
Referring to Fig. 1 and Fig. 2, these light emitting diodes 120 are to be disposed on the first inwall 111 of backboard 110.Specifically, these light emitting diodes 120 are to be disposed on circuit board 122, and are electrically connected to circuit board 122, and circuit board 122 is to be attached on the first inwall 111.On the other hand, 122 of circuit boards are to be electrically connected to connector 124, to be electrically connected with external circuit by connector 124.In the present embodiment, connector 124 is to be configured on backboard 110 and contiguous the first inwall 111.Specifically, connector 124 is disposed on circuit board 122 and is electrically connected to light emitting diode 120, and connector 124 is between light guide plate 130 and circuit board 122.
It is worth mentioning that, the corner of the light guide plate 130 of the present embodiment is for example to have breach 136, and keeper 140 is corresponding breach 136 and between light guide plate 130 and the 3rd inwall 113 or light guide plate 130 and the 4th inwall 114.
The first bolster 150 is to be disposed between the second inwall 112 of light guide plate 130 and backboard 110, and contiguous the first corner C1 and the second corner C2.Specifically, the rigidity of the first bolster 150 is less than the rigidity of keeper 140.In the present embodiment, the material of keeper 140 is for example metal, and the material of the first bolster 150 is for example rubber or other flexible materials.
From the above, backlight module 100 is by keeper 140 and the first bolster 150, light guide plate 130 to be positioned between the first inwall 111 and the second inwall 112.And, owing to being provided with the large and on-deformable keeper 140 of rigidity between light guide plate 130 and light emitting diode 120, between light guide plate 130 and the second inwall 112, be to be provided with to there is flexual the first bolster 150, therefore in the time that light guide plate 130 expands because the temperature of environment of living in raises, light guide plate 130 can be pushed the first bolster 150 towards the direction prolonged expansion of the second inwall 112.Hence one can see that, even if light guide plate 130 produces the situation of expanding with heat and contract with cold because of the variation of residing environment temperature, still can light guide plate 130 be positioned between first inwall 111 and the second inwall 112 of backboard by keeper 140 and the first bolster 150, avoid light guide plate 130 to produce excessive displacement, and then maintain the bright dipping quality of backlight module 100.
It is worth mentioning that, for light guide plate 130 being flexibly fixed between the 3rd inwall 113 and the 4th inwall 114, the backlight module 100 of the present embodiment can also comprise multiple the second bolsters 160, it is disposed at respectively between light guide plate 130 and the 3rd inwall 113 and between the 4th inwall 114, and is respectively adjacent to the first corner C1 and the second corner C2.And the rigidity of the second bolster 160 is also less than the rigidity of keeper 130.As shown in Figure 1, the first bolster 150 and the second bolster 160 of contiguous the first corner C1 are connected with each other, and the first bolster 150 and the second bolster 160 of contiguous the second corner C2 are also connected with each other.And in the present embodiment, the first bolster 150 and the second bolster 160 that are connected can be to make in integrated mode.
On the other hand, first bolster 150 of the present embodiment is made up of body 152 and segment difference section 154, and similarly, the second bolster 160 is made up of body 162 and segment difference section 164.Segment difference section 154 is between body 152 and light guide plate 130, and 164 of segment difference sections are between body 162 and light guide plate 130.Specifically,, in the direction of the exiting surface 134 of vertical light guide plate 130, the height of segment difference section 154 and segment difference section 164 is for example respectively lower than body 152 and body 162.
As shown in Figure 2, backlight module 100 also includes the glue frame 170 being sticked on backboard 110 conventionally, so that light guide plate 130 and other blooming piece (not shown) being positioned in light guide plate 130 are fixed on to accommodation space 115.In the present embodiment, in the time that light guide plate 130 is pushed the first bolster 150 because of moisture absorption or expanded by heating, can there be protuberance slightly segment difference section 154 because stress deformation causes its surface 155 that is parallel to exiting surface 134.But because segment difference section 154 and glue frame 170 are spaced a distance, even if segment difference section 154 makes surface 155 protuberances because being squeezed, surface 155 does not contact to glue frame 170 yet, therefore can maintain the intensity that engages between glue frame 170 and backboard 110.Similarly, the segment difference section 164 of the second bolster 160 also has identical function.In other words,, after first bolster 150 of the present embodiment and the second bolster 160 can avoid it to be out of shape being squeezed, glue frame 170 is bestowed the acting force in unexpected and glue frame 170 is separated with backboard 110.
Specifically, in another embodiment of the present invention, as shown in Figure 3, also can on the surface 156 of the first bolster 150 and the surface 166 of the second bolster 160, form groove 157 and groove 167 respectively, to avoid the first bolster 150 to cause surface 156 and surface 166 to produce the phenomenon of protuberance in the time being subject to the extruding of light guide plate 130.At this, surface 156 and surface 166 are the exiting surfaces 134 that are roughly parallel to light guide plate 130.Specifically, groove 157 and groove 167 can be the holes that runs through respectively the first bolster 150 and the second bolster 160, can be respectively also the holes that the degree of depth is less than the thickness of the first bolster 150 and the second bolster 160.The degree of depth of groove 157 and groove 167 can decide depending on the default physical strength of the first bolster 150 and the second bolster 160 respectively, and the present invention does not do any restriction at this.In the present embodiment, groove 157 and groove 167 communicate with each other, also can according to actual demand allow groove 157 and groove 167 independent of one another.
It should be noted that, for making accompanying drawing comparatively succinctly understandable, Fig. 1 and Fig. 3 only do above-mentioned explanation as an example of the first bolster 150 of contiguous the second corner C2 and the second bolster 160 example, but one of ordinary skill in the art should be understood that the first bolster 150 of contiguous the first corner C1 and the second bolster 160 and also can be designed to the section of having difference or groove.
In sum, in backlight module of the present invention, be to be disposed on the first inwall of backboard as the light emitting diode of light source, and be provided with keeper between light guide plate and the first inwall, between the second inwall of light guide plate and backboard, be provided with bolster.Because the rigidity of keeper is greater than the rigidity of bolster, therefore, in the time of light guide plate moisture absorption or expanded by heating, can avoid light guide plate towards light emitting diode prolonged expansion, so that light guide plate is pushed bolster towards opposite side prolonged expansion.Because the rigidity of bolster is enough little, can be out of shape in response to suffered acting force, therefore can push bolster when light guide plate because of moisture absorption or expanded by heating, avoid light guide plate to be subject to lateral compression power and be out of shape.And follow-up light guide plate Yin Wendu declines and while being contracted to life size, the issuable displacement of light guide plate is minimum, therefore can make backlight module have stable bright dipping quality.
In addition, from the above, backlight module of the present invention is the location that completes light guide plate by keeper and bolster, so the light guide plate in backlight module of the present invention need not have the design of lug, can avoid light at lug place optically focused, and then promote the outgoing light homogeneity of backlight module.
Although disclosed the present invention in conjunction with above preferred embodiment; but it is not in order to limit the present invention; any one of ordinary skill in the art without departing from the spirit and scope of the present invention; can do a little change and retouching, therefore protection scope of the present invention should be as the criterion with the scope that claim was defined of enclosing.
Claims (9)
1. a backlight module, comprising:
Backboard, there is one first inwall, one second inwall, one the 3rd inwall and one the 4th inwall, wherein this first inwall is with respect to this second inwall, the 3rd inwall is with respect to the 4th inwall, and the 3rd inwall and this second inwall intersect at one first corner, the 4th inwall and this second inwall intersect at one second corner, and this first inwall, this second inwall, the 3rd inwall and the 4th inwall surround an accommodation space;
Multiple light emitting diodes, are disposed on this first inwall; And
Light guide plate, is disposed in this accommodation space, and this light guide plate has an incidence surface, and this incidence surface is with respect to this first inwall,
It is characterized in that:
This backlight module also comprises: at least one keeper, be arranged in this accommodation space, and between this light guide plate and this first inwall; And multiple the first bolsters, be disposed at respectively between this light guide plate and this second inwall, and contiguous this first corner and this second corner, wherein the rigidity of these the first bolsters is less than the rigidity of this keeper.
2. backlight module as claimed in claim 1, also comprise multiple the second bolsters, be disposed at respectively between this light guide plate and the 3rd inwall and this light guide plate and the 4th inwall, and be respectively adjacent to this first corner and this second corner, and the rigidity of these the second bolsters is less than the rigidity of this keeper.
3. backlight module as claimed in claim 2, wherein this first bolster and this second bolster in contiguous this first corner are connected with each other, and this first bolster and this second bolster in contiguous this second corner are connected with each other.
4. backlight module as claimed in claim 3, wherein this first bolster and this second bolster in contiguous this first corner are formed in one, and this first bolster and this second bolster in contiguous this second corner are formed in one.
5. backlight module as claimed in claim 1, wherein respectively this first bolster comprises a body and a segment difference section, and this segment difference section is between this body and this light guide plate.
6. backlight module as claimed in claim 1, wherein respectively this first bolster has a first surface, and this light guide plate has an exiting surface, and this first surface is roughly parallel to this exiting surface, and this first surface also has at least one groove.
7. backlight module as claimed in claim 1, also comprises:
Circuit board, is attached on this first inwall of this backboard, and described light emitting diode is disposed on this circuit board and with it and is electrically connected; And
Connector, is disposed on this circuit board and is electrically connected to these light emitting diodes, and this connector is between this light guide plate and this circuit board.
8. backlight module as claimed in claim 7, wherein this keeper comprises a sheet metal, is arranged between this connector and this light guide plate.
9. backlight module as claimed in claim 1, wherein the corner of contiguous this first inwall of this light guide plate has a breach, and this keeper corresponds to this breach and between this light guide plate and the 3rd inwall or this light guide plate and the 4th inwall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100119284A TWI440941B (en) | 2011-06-01 | 2011-06-01 | Back light module |
| TW100119284 | 2011-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102352985A CN102352985A (en) | 2012-02-15 |
| CN102352985B true CN102352985B (en) | 2014-05-28 |
Family
ID=45576609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110217465.9A Expired - Fee Related CN102352985B (en) | 2011-06-01 | 2011-08-01 | Backlight module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102352985B (en) |
| TW (1) | TWI440941B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8749730B2 (en) * | 2012-02-16 | 2014-06-10 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Edge-lit backlight module and LCD device |
| CN102563468B (en) * | 2012-02-16 | 2015-04-22 | 深圳市华星光电技术有限公司 | Side-light type backlight module and liquid crystal display device |
| CN103363381B (en) * | 2012-03-29 | 2016-12-14 | 群康科技(深圳)有限公司 | Backlight module and liquid crystal indicator |
| CN102620210A (en) * | 2012-03-30 | 2012-08-01 | 深圳市华星光电技术有限公司 | LCD (Liquid Crystal Display) device and backlight module thereof |
| CN102748651A (en) * | 2012-05-15 | 2012-10-24 | 达运精密工业（厦门）有限公司 | Backlight module and liquid crystal display device |
| CN102798035B (en) * | 2012-07-17 | 2015-11-25 | 深圳市华星光电技术有限公司 | Liquid crystal indicator and backlight module thereof |
| CN104487759B (en) * | 2012-07-27 | 2016-08-24 | 夏普株式会社 | Illuminator, display device and radiovisor |
| TWI489181B (en) * | 2013-01-25 | 2015-06-21 | Au Optronics Corp | Display and backlight module thereof |
| CN103672764A (en) * | 2013-12-20 | 2014-03-26 | 合肥京东方光电科技有限公司 | Locating mechanism, backlight source and display device |
| CN103791467A (en) | 2014-01-24 | 2014-05-14 | 成都京东方光电科技有限公司 | Rubber frame, backlight module and display device |
| CN113971904A (en) * | 2020-07-22 | 2022-01-25 | 邱榆钧 | Electronic device |
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|---|---|---|---|---|
| US20080144337A1 (en) * | 2006-12-15 | 2008-06-19 | Innocom Technology (Shenzhen) Co., Ltd. | Accommodating frame and backlight module with the same |
| CN201166761Y (en) * | 2008-04-03 | 2008-12-17 | 北京京东方光电科技有限公司 | Backlight source module for LCD device |
| CN201359237Y (en) * | 2009-03-06 | 2009-12-09 | 北京京东方光电科技有限公司 | Backlight module |
| TW201003224A (en) * | 2008-07-01 | 2010-01-16 | Au Optronics Corp | Backlight module |
| US20100073904A1 (en) * | 2008-09-23 | 2010-03-25 | Au Optronics Corporation | Backboard of the Backlight Module |
| CN201531836U (en) * | 2009-10-10 | 2010-07-21 | 广东亚一照明科技有限公司 | Locating structure for light guide plate |
| CN101943350A (en) * | 2009-07-03 | 2011-01-12 | 中强光电股份有限公司 | Backlight module |
-
2011
- 2011-06-01 TW TW100119284A patent/TWI440941B/en not_active IP Right Cessation
- 2011-08-01 CN CN201110217465.9A patent/CN102352985B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080144337A1 (en) * | 2006-12-15 | 2008-06-19 | Innocom Technology (Shenzhen) Co., Ltd. | Accommodating frame and backlight module with the same |
| CN201166761Y (en) * | 2008-04-03 | 2008-12-17 | 北京京东方光电科技有限公司 | Backlight source module for LCD device |
| TW201003224A (en) * | 2008-07-01 | 2010-01-16 | Au Optronics Corp | Backlight module |
| US20100073904A1 (en) * | 2008-09-23 | 2010-03-25 | Au Optronics Corporation | Backboard of the Backlight Module |
| CN201359237Y (en) * | 2009-03-06 | 2009-12-09 | 北京京东方光电科技有限公司 | Backlight module |
| CN101943350A (en) * | 2009-07-03 | 2011-01-12 | 中强光电股份有限公司 | Backlight module |
| CN201531836U (en) * | 2009-10-10 | 2010-07-21 | 广东亚一照明科技有限公司 | Locating structure for light guide plate |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201250344A (en) | 2012-12-16 |
| CN102352985A (en) | 2012-02-15 |
| TWI440941B (en) | 2014-06-11 |
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