CN100492135C - Backlight module for improving liquid crystal display device light leakage - Google Patents
Backlight module for improving liquid crystal display device light leakage Download PDFInfo
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- CN100492135C CN100492135C CNB2007101125150A CN200710112515A CN100492135C CN 100492135 C CN100492135 C CN 100492135C CN B2007101125150 A CNB2007101125150 A CN B2007101125150A CN 200710112515 A CN200710112515 A CN 200710112515A CN 100492135 C CN100492135 C CN 100492135C
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- backlight module
- light
- fixed
- backboard
- substrate
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Abstract
The invention relates to a leaky used to improve LCD backlight module, which contains a backplane, the plural of lamp, a first optical substrate, as well as a fixed component and a lamp second lamp fixed components. The first lamp fixed components installed at the side of the backplane, to fix these tubes in the back, do not include an optical transmission component, as well as a reflection pieces. The opacity of these components used to block a lamp light. Light reflection of the reflection of these tubes used to the beam of light emitted from the substrate of the optical components of the second lamp fixed backplane installed at the end of the plane, a fixed lamp used in the backplane, the second lamp fixed component consists of a substrate, the plural of Holder and the plural of chimeric department. This holder of the first installed at the substrate surface. These chimeric referred to the department of the second installed at the substrate surface, each of the chimeric chimerism in the corresponding period of these fixed-fixed a hole, and each one of the chimeric not translucent material.
Description
Technical field
The present invention relates to a kind of backlight liquid crystal display module, refer to a kind of backlight module that is used to improve liquid crystal display device light leakage especially.
Background technology
Function advanced person's display gradually becomes the valuable feature of consumption electronic product now, and wherein LCD has become the display that various electronic equipments such as mobile phone, PDA(Personal Digital Assistant), digital camera, computing machine screen or the widespread use of mobile computer screen institute have the colored screen of high-res gradually.
Because liquid crystal itself is not luminous, so need to provide adequate brightness and the light source that is evenly distributed to make its normally show image by backlight module.See also Fig. 1, Fig. 1 is the exploded view of the backlight module 10 of prior art.Traditional backlight module 10 comprises a light guide plate 16, a plurality of fluorescent tube 18 and a plurality of optical element.Optical element comprises diffuser plate 4, prismatic lens 6 and polaroid 8 or the like.General fluorescent tube 18 select for use the cold cathode fluorescent lamp pipe (Cold Cathode Fluorescent Lamp, CCFL).These type of fluorescent tube 18 configured in parallel are in the inside of backlight module 10 mechanisms.After the light penetration that fluorescent tube 18 sends entered light guide plate 16, light guide plate 16 meeting directing light directions were with the uniform luminance of control light.The light that is penetrated by light guide plate 16 penetrates diffuser plate 4 again, and the particle of diffuser plate 4 inside can cause the effect of optics diffusion, to reach the purpose that uniform area light source is provided.Prismatic lens 6 reaches the purpose that improves briliancy by the refraction of light with reflection, to increase the utilization benefit after light self-diffusion plate 4 penetrates.Polaroid 8 converts light to useful polarisation, to reach the purpose that improves brightness.
See also Fig. 1 to Fig. 3, Fig. 2 illustrates lamp tube cover shown in Figure 1 (lamp holder), and Fig. 3 illustrates Fig. 1 light guide plate is installed the sectional view of back along 1-1 '.As shown in Figure 1, the bottom 121 of the backboard 12 of backlight module 10 is used for installing the fluorescent tube 18 as cold cathode ray tube and so on, and the dual-side of backboard 12 then is equipped with lamp tube cover 14.Lamp tube cover 14 comprises a lamp tube fixation assembly 141, which is provided with a plurality of breach 142.These a plurality of breach 142 are used for fixing a plurality of fluorescent tubes 18, make these fluorescent tubes 18 be fixed on the bottom 121 of backboard 12.Lamp tube cover 14 also comprises a groove 146, and groove 146 is used for setting light guide plate 16.Last various optical element is being positioned on the lamp tube cover 14.Traditionally, concentrate on light guide plate 16 for the light of fluorescent tube 18 can be reflected, whole lamp tube cover 14 adopts white reflecting material.Thus, when fluorescent tube 18 emitted beam, the lamp tube fixation assembly 141 of white reflecting material can make it the light reflection direction towards light guide plate 16, to use light more efficiently.
See also Fig. 4, Fig. 4 is the synoptic diagram that prior art backlight module 10 produces light leak.When light the time, produce the optically focused reflex at groove 146 places of lamp tube cover 14 easily by diffuser plate 4.Produce bright line, the just problems of side direction light leak in the left and right sides 104 of the viewing area 102 of backlight module 10 in such event.
Please join Fig. 1, Fig. 5 A, Fig. 5 B and Fig. 6, Fig. 5 A, Fig. 5 B system illustrates holding frame for luminous tube shown in Figure 1 (lamp support) 15, and Fig. 6 illustrates by the backboard 12 shown in the arrow A direction of Fig. 1.Backlight module 10 comprises a plurality of holding frame for luminous tube (lamp support) 15 in addition, and each holding frame for luminous tube 15 comprises a substrate 151, plurality of fixed seat 152, a plurality of fitting portion 154 and a plurality of prodger 156.Each holder 152 is arranged at first 1511 of substrate 151, is used for fixing these fluorescent tubes 18.A plurality of fitting portions 154 are arranged at substrate 151 with respect to first 1511 second 1512.Offer plurality of fixed hole 122 on the backboard 12, and each fitting portion 154 correspondence is embedded in a fixed orifice of these fixed orifices 122.Because when light guide plate 16 and diffusion sheet 4 are fixed on the groove 146 of lamp tube cover 14, can make the zone line of light guide plate 16 and diffusion sheet 4 sagging because of the influence of gravity, so the prodger 156 of holding frame for luminous tube 15 is used for supporting light guide plate 16 and diffusion sheet 4, light guide plate 16 and diffusion sheet 4 can flatly be placed.Yet traditionally, whole holding frame for luminous tube 15 adopts because of white reflecting material, so when these light sources 18 emitted beam, light can penetrate from the fixed orifice 122 of backboard 12, cause the disappearance of back side light leak.
Therefore, improving the disappearance of backlight module side direction light leak and back side light leak, is the target that manufacturers make great efforts.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of backlight module that can improve side direction and back side light leak, to solve the problem of above-mentioned prior art.
One embodiment of the invention provide a kind of backlight module, and it comprises a backboard, a plurality of fluorescent tube, an optical element and one first lamp fixed components and one second lamp fixed components.Described a plurality of fluorescent tube is used for producing light.Described first lamp fixed components is arranged at the side of described backboard, is used for fixing these fluorescent tubes in described backboard, and it comprises a light tight assembly and a smooth reflecting element.Described light tight assembly is used for stopping the light that these fluorescent tubes send.Described smooth reflecting element is used for reflecting light that these fluorescent tubes send to described optical element, and wherein said light tight assembly and described smooth reflecting element thing are one-body molded.Described second lamp fixed components is arranged on the bottom surface of described backboard, is used for fixing these fluorescent tubes on described backboard, and described second lamp fixed components comprises a substrate, plurality of fixed seat and a plurality of fitting portion.Described plurality of fixed seat is arranged at described surface of first base, is used for fixing these fluorescent tubes.Described a plurality of fitting portion is arranged at described substrate with respect to described first second, each fitting portion correspondence is embedded in a fixed orifice of these fixed orifices, and each fitting portion is a light tight material, and wherein said substrate, described these holders and described these fitting portions are one-body molded.
Another embodiment of the present invention provides a kind of backlight module, and it comprises a backboard, a plurality of fluorescent tube, an optical element and a holding frame for luminous tube.Described backboard is provided with the plurality of fixed hole, and a plurality of fluorescent tubes are used for emitting beam.Described holding frame for luminous tube comprises a substrate, plurality of fixed seat and a plurality of fitting portion.Described plurality of fixed seat is arranged at described surface of first base, is used for fixing described these fluorescent tubes.Described a plurality of fitting portion is arranged at described substrate with respect to described first second, each fitting portion correspondence is embedded in a fixed orifice of described these fixed orifices, and each fitting portion is a light tight material, and wherein said substrate, described these holders and described these fitting portions are one-body molded.
Module provided by the invention can effectively be improved the problem of the light leak of LCD.
Description of drawings
Fig. 1 is the exploded view of the backlight module of prior art.
Fig. 2 illustrates lamp tube cover shown in Figure 1.
Fig. 3 illustrates Fig. 1 optical element is installed the sectional view of back along 1-1 '.
Fig. 4 produces the synoptic diagram of light leak for the prior art backlight module.
Fig. 5 A, Fig. 5 B illustrate holding frame for luminous tube shown in Figure 1.
Fig. 6 illustrates by the backboard shown in the arrow A direction of Fig. 1.
Fig. 7 is the exploded view of the backlight module of one embodiment of the invention.
Fig. 8 illustrates the lamp tube cover shown in 7 figure.
Fig. 9 illustrates Fig. 7 optical element is installed the sectional view of back along 7-7 '.
Figure 10 A-Figure 10 C illustrates the embodiment that light reflecting element and light tight assembly interfix respectively.
Figure 11 A-Figure 11 C illustrates stereographic map, backplan and the side view of holding frame for luminous tube shown in Figure 7.
Figure 12 system illustrates by the backboard shown in the arrow B direction of Fig. 7.
Drawing reference numeral
10,50 backlight modules, 4,44 diffuser plates
6,46 prismatic lenses, 8,48 polaroids
12, the bottom surface of 52 backboards, 121,521 backboards
14,54 lamp tube covers, 15,55 holding frame for luminous tube
16,56 light guide plate, 18,58 fluorescent tubes
102 viewing areas, 104 bright lines
141 lamp tube fixation assemblies, 142 breach
146,546 grooves, 151,551 substrates
152,552 holders, 154,554 fitting portions
156,556 prodgers, 122 fixed orifices
Second of 1511 surface of first base, 1512 substrates
541 smooth reflecting element 544 light tight assemblies
548 retaining elements, 5412 trips
5442 projections, 5411 locked grooves
5521 breach, 5522 protection rings
Second of 5511 surface of first base, 5512 substrates
Embodiment
See also Fig. 7 to Fig. 9, Fig. 7 is the exploded view of backlight module 50 of the present invention, and Fig. 8 illustrates lamp tube cover shown in Figure 7, and Fig. 9 illustrates Fig. 7 optical element is installed the sectional view of back along 7-7 '.In the present embodiment, backlight module 50 comprises a plurality of fluorescent tubes 58 and a plurality of optical element.Optical element comprises light guide plate 56, diffuser plate 44, prismatic lens 46, polaroid 48 or above combination.General fluorescent tube 58 select for use the cold cathode fluorescent lamp pipe (Cold Cathode Fluorescent Lamp, CCFL).These type of fluorescent tube 58 configured in parallel are in the inside of backlight module 50.After the light penetration that fluorescent tube 58 sends entered light guide plate 56, light guide plate 56 can be controlled the uniform luminance of light.The light that is penetrated by light guide plate 56 penetrates diffuser plate 44 again, and the particle of diffuser plate 44 inside can cause the effect of optics diffusion, to reach the purpose that uniform area light source is provided.Prismatic lens 46 reaches the purpose that improves briliancy by the refraction of light with reflection, to increase the utilization benefit after light self-diffusion plate 44 penetrates.Polaroid 48 converts light to useful polarisation, to reach the purpose that improves brightness.
See also Fig. 7 to Fig. 9, the bottom 521 of the backboard 52 of backlight module 50 is used for installing the fluorescent tube 58 as cold cathode ray tube and so on, and backboard 52 comprises lamp fixed components, be lamp tube cover 54 and holding frame for luminous tube 55, wherein be positioned at backboard 52 dual-sides for lamp tube cover 54, be positioned at and be holding frame for luminous tube 55 on backboard 52 bottoms.Lamp tube cover 54 comprises a smooth reflecting element 541 and a light tight assembly 544, and wherein light tight assembly 544 and light reflecting element 541 are one-body molded.Light reflecting element 541 is provided with a plurality of breach 542, and these a plurality of breach 542 are used for fixing a plurality of fluorescent tubes 58, makes described these fluorescent tubes 58 be fixed on the bottom 521 of backboard 52.Preferably, the material of light reflecting element 541 can be white reflecting material or other has the material of high reflectance, makes the light that is sent by described these fluorescent tubes 58 can reflex to light guide plate 56.544 of light tight assemblies can be the lighttight material of black and form, and light tight assembly 544 extends to a side of light reflecting element 541, make and form a groove 546 between light reflecting element 541 and the light tight assembly 544, utilize light tight assembly 544 can suppress the edge of light guide plate 56 and diffuser plate 44, make whole backlight module 50 fixing, in other words, groove 546 is used for setting diffuser plate 44.
Because the light reflecting element 541 of lamp tube cover 54 is to adopt because white reflecting material concentrates on light guide plate 56 so the light of fluorescent tube 58 can reflect.But light tight assembly 544 can stop light, so the therefore crested of optically focused that produces at groove 546 places of lamp tube cover 54.When showing, just can avoid the left and right sides to produce bright line at backlight module 50 in such event, and improve the problem of side direction light leak.
See also Figure 10 A-Figure 10 C, Figure 10 A-Figure 10 C illustrates the embodiment that light reflecting element 541 and light tight assembly 544 interfix respectively.In the embodiment shown in Figure 10 A, a retaining element 548 (for example screw) passes the perforate of light tight assembly 544 and is locked on the locked groove 5411 of light reflecting element 541.In the embodiment shown in Figure 10 B, light tight assembly 544 is provided with a projection 5442, and its diameter D1 is slightly larger than the diameter D2 of the locked groove 5411 of light reflecting element 541 approximately.When assembling, can bestow an external force and make the projection 5442 of light tight assembly 544 be entrenched among the locked groove 5411 of light reflecting element 541.In the embodiment shown in Figure 10 C, light tight assembly 544 is provided with a perforate 5441, and light reflecting element 541 is provided with a trip 5412, when assembling, the perforate 5441 that can make trip 5412 pass light tight assembly 544 makes light tight assembly 544 be fastened on the light reflecting element 541.
See also Fig. 7, Figure 11 A, Figure 11 B, Figure 11 C figure and Figure 12.Figure 11 A illustrates holding frame for luminous tube shown in Figure 7 55, and Figure 11 B, Figure 11 C illustrate backplan and the side view by the holding frame for luminous tube 55 of Figure 11 A, and Figure 12 system illustrates by the backboard 52 shown in the arrow B direction of Fig. 7.In Fig. 7, backlight module 50 comprises a plurality of holding frame for luminous tube (lamp support) 55 in addition, and each holding frame for luminous tube 55 comprises a substrate 551, plurality of fixed seat 552, a plurality of fitting portion 554 and a plurality of prodger 556.Each holder 552 is arranged at first 5511 of substrate 551, and holder 552 comprises a guard circle 5522, which is provided with a breach 5521, and fluorescent tube 58 can pass breach 5521, makes fluorescent tube 58 be fixed on the guard circle 5522.A plurality of fitting portions 554 are arranged at substrate 551 with respect to first 5511 second 5512.In preferred embodiment, fitting portion 554 is that light tight material is made, and perhaps second of holding frame for luminous tube 55 5512 and fitting portion 554 are all formed by light tight material and also can; Relatively, 556 of substrate 551, plurality of fixed seat 552 and prodgers are formed by white reflecting material.Offer plurality of fixed hole 522 on the backboard 52, and each fitting portion 554 correspondence is embedded in a fixed orifice 522 of described these fixed orifices 522.Because when light guide plate 56 and diffusion sheet 44 are fixed on the groove 546 of lamp tube cover 54, can make the zone line of light guide plate 56 and diffusion sheet 44 sagging because of the influence of gravity, so the prodger 556 of holding frame for luminous tube 55 is used for supporting light guide plate 56 and diffusion sheet 44, light guide plate 56 and diffusion sheet 44 can flatly be placed.Because the fitting portion of holding frame for luminous tube 55 554 is light tight material, when so the fitting portion 554 of holding frame for luminous tube 55 is entrenched in the fixed orifice 522 of backboard 52, light source 58 emits beam to be covered to die by fitting portion 554 and can not penetrate from the fixed orifice 522 of backboard 52, and then improves the disappearance of back side light leak.
The backlight module 50 of present embodiment can be applicable among the LCD.
Compared to prior art, lamp tube cover of the present invention uses the light tight assembly of light tight material and the light reflecting element of white reflecting material.In preferred embodiment, described light tight assembly is a black, so can cover the light that background light source scatters, improves the problem of side direction light leak.Holding frame for luminous tube of the present invention then uses substrate, plurality of fixed seat and the prodger of the fitting portion and the white reflecting material of light tight material.Once the fitting portion of holding frame for luminous tube is when being entrenched in the fixed orifice of backboard, the light that light source sends can not penetrate from the fixed orifice of backboard because of the covering of fitting portion of light tight material, and then improves the disappearance of back side light leak.
Though the present invention discloses as above with preferred embodiment; but it is not in order to qualification the present invention, any people who knows this technology, without departing from the spirit and scope of the present invention; can do various changes and modification, so protection scope of the present invention is when looking being as the criterion that the claim scope defined.
Claims (13)
1. backlight module, this backlight module comprises:
One backboard comprises on the bottom surface that the plurality of fixed hole is arranged at this backboard;
A plurality of fluorescent tubes are arranged in the described backboard, are used for emitting beam;
One optical element;
One first lamp fixed components is arranged at the side of described backboard, is used for fixing described these fluorescent tubes in described backboard, and it comprises:
One light tight assembly is used for stopping the light that described these fluorescent tubes send; And
One smooth reflecting element is used for reflecting light that described these fluorescent tubes send to described optical element, and wherein said light tight assembly and described smooth reflecting element are one-body molded; And
One second lamp fixed components is arranged on the bottom surface of described backboard, is used for fixing described these fluorescent tubes, and it comprises:
One substrate;
The plurality of fixed seat is arranged at described surface of first base, is used for fixing described these fluorescent tubes; And
A plurality of fitting portions, be arranged at described substrate with respect to described first second, each fitting portion correspondence is embedded in a fixed orifice of described these fixed orifices, and each fitting portion is a light tight material, and wherein said substrate, described these holders and described these fitting portions are one-body molded.
2. backlight module as claimed in claim 1, wherein said first lamp fixed components are to form described light tight assembly and described smooth reflecting element with double-colored ejection formation.
3. backlight module as claimed in claim 1, a holder of wherein said these holders comprises a breach, is used for making a fluorescent tube of described these fluorescent tubes to pass described breach to be fixed on the described holder.
4. backlight module as claimed in claim 1, wherein said second lamp fixed components comprises at least one prodger in addition, is arranged on the described surface of first base, is used for holding described optical element.
5. backlight module as claimed in claim 1, wherein said second lamp fixed components are to form described these fitting portions of light tight material respectively in the mode of double-colored ejection formation, and form described substrate and described these holders.
6. backlight module as claimed in claim 1, wherein said optical element comprise to be selected from by a light guide plate, a diffusion sheet and a polaroid and one of are formed in the group.
7. a LCD, it uses backlight module as claimed in claim 1.
8. backlight module, it comprises:
One backboard is provided with the plurality of fixed hole;
A plurality of fluorescent tubes are arranged on the described backboard, are used for emitting beam;
One optical element is used for directing light; And
One holding frame for luminous tube is arranged on the bottom surface of described backboard, and it comprises:
One substrate;
The plurality of fixed seat is arranged at described surface of first base, is used for fixing described these fluorescent tubes; And
A plurality of fitting portions are arranged at described substrate with respect to described first second, and each fitting portion correspondence is embedded in a fixed orifice of described these fixed orifices, and each fitting portion is a light tight material,
Wherein said substrate, described these holders and described these fitting portions are one-body molded.
9. the described backlight module of claim 8, a holder of wherein said these holders comprises a breach, is used for making a fluorescent tube of described these fluorescent tubes to pass described breach to be fixed on the described holder.
10. the described backlight module of claim 8, wherein said holding frame for luminous tube comprises at least one prodger in addition, is arranged on the described surface of first base, is used for holding described optical element.
11. the described backlight module of claim 8, wherein said holding frame for luminous tube are to form described these fitting portions of light tight material respectively in the mode of double-colored ejection formation, and form described substrate and described these holders.
12. the described backlight module of claim 8, wherein said optical element comprise to be selected from by a light guide plate, a diffusion sheet and a polaroid and one of are formed in the group.
13. a LCD is applied to the described backlight module of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101125150A CN100492135C (en) | 2007-06-19 | 2007-06-19 | Backlight module for improving liquid crystal display device light leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101125150A CN100492135C (en) | 2007-06-19 | 2007-06-19 | Backlight module for improving liquid crystal display device light leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071234A CN101071234A (en) | 2007-11-14 |
| CN100492135C true CN100492135C (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101125150A Expired - Fee Related CN100492135C (en) | 2007-06-19 | 2007-06-19 | Backlight module for improving liquid crystal display device light leakage |
Country Status (1)
| Country | Link |
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| CN (1) | CN100492135C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI371617B (en) | 2008-08-15 | 2012-09-01 | Au Optronics Corp | Display device |
| CN101344683B (en) * | 2008-08-26 | 2010-12-22 | 友达光电股份有限公司 | Display apparatus |
| KR101274714B1 (en) | 2009-12-11 | 2013-06-12 | 엘지디스플레이 주식회사 | Back light unit |
| CN102721014B (en) * | 2012-06-19 | 2013-12-25 | 友达光电(厦门)有限公司 | Lamp tube positioning structure and light-emitting device thereof |
| CN103698937B (en) * | 2013-12-04 | 2016-06-08 | 苏州佳世达电通有限公司 | Display device and backlight module thereof |
-
2007
- 2007-06-19 CN CNB2007101125150A patent/CN100492135C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101071234A (en) | 2007-11-14 |
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Granted publication date: 20090527 Termination date: 20200619 |