CN101191950A - Backlight module and LCD device - Google Patents
Backlight module and LCD device Download PDFInfo
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- CN101191950A CN101191950A CNA2006101636611A CN200610163661A CN101191950A CN 101191950 A CN101191950 A CN 101191950A CN A2006101636611 A CNA2006101636611 A CN A2006101636611A CN 200610163661 A CN200610163661 A CN 200610163661A CN 101191950 A CN101191950 A CN 101191950A
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- striation
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Abstract
The invention provides a liquid crystal display device, comprising a light guide plate, an LCD panel arranged on the light guide plate, a framework and a light strip, wherein, the framework is provided with a cabinet for placing the light guide plate and a framework wall, the framework wall is provided with an opening and a light strip receiving space, the light strip is inserted into the light strip receiving space from the opening.
Description
Technical field
The invention provides a kind of LCD (liquid crystal display, LCD) with a kind of backlight module (backlight module, BLM), especially a kind of LCD and backlight module with specially designed light source and assembled components.
Background technology
No matter LCD is flourish all in small size or large-sized application, and because LCD has light weight, volume are thin, low power consuming, radiationless and other good characteristic, thereby become the main product on the market.Therefore, LCD has been widely used in the various information products, for example: mobile computer, mobile phone, digital camera or PDA(Personal Digital Assistant), even replace conventional cathode ray tube (cathode raytube gradually, CRT) TV, back projection type TV or plasma (plasma display panel, PDP) TV.
Because liquid crystal molecule itself is non-luminous, backlight module thereby become one of LCD primary clustering, and traditional backlight module is to utilize the cold cathode fluorescent lamp pipe (cold cathodefluorescent lamp is CCFL) as light source.Fig. 1 is the fragmentary cross-sectional view of known backlight module, and this known backlight module 10 includes light guide plate 14, be arranged near the light guide plate 14 cold cathode fluorescent lamp pipe 12, be arranged at the reflecting plate 16 under the light guide plate, a plurality of framework 20 that is arranged at the optical thin film 18 on the light guide plate 14 and is used for fixing backlight module 10 assemblies.Because cold cathode fluorescent lamp pipe 12 can produce light from each side of fluorescent tube, therefore must place fluorescent tube reflex housing 22 on cold cathode fluorescent lamp pipe 12 next doors, with light reflected back cold cathode fluorescent lamp pipe 12 or light guide plate 14, thereby improve light utilization efficiency.And, for fear of light from fluorescent tube reflex housing 22 and the leakage of the upside space of 18 of optical thin films, shading rubber belt 24 need be set to cover the space between fluorescent tube reflex housing 22 and the optical thin film 18.
Yet, limited the improvement of color specification owing to the LCD that with the cold cathode fluorescent lamp pipe is light source, therefore the light source of cold cathode fluorescent lamp pipe can't be met customer need gradually, and the cold cathode fluorescent lamp pipe itself contains mercury, does not meet the requirement as green product.Therefore, in recent years, (light emitting diode LED) had been applied on the backlight module and had used as light source light emitting diode, because light emitting diode has advantages such as the fast and volume of color saturation height, reaction rate is little, make in undersized LCD very popular.Yet, because white light emitting diode sends the also prematurity still of saturated white light technology, so be in backlight module, to use ruddiness, green glow and blue light-emitting diode as light source simultaneously in many products.In the case, in order to make ruddiness, green glow and the abundant mixed light of blue light light, the mixed light design of good just must be arranged, so the price that the backlight module of LED-type needs the complicated mechanical structure and is higher than cold cathode fluorescent lamp pipe backlight module.
U.S. Patent No. 6,930,737 disclose known to the liquid crystal display device structure of light emitting diode as light source with U.S. publication application No.2005-0157521.According to U.S. Patent No. 6,930,737 with reference to figure 2, its disclosed LCD device 50 includes housing 52, framework 72, liquid crystal panel 54, multi-disc optical thin film 56, photoconductive tube (light pipe, or title light guide plate) 60, enhanced specular reflectivity sheet (enhanced specular reflector, ESR) 70, printed circuit board (PCB) (print circuit board, PCB) 62, light emitting diode matrix 64,66, enhancement mode scattered reflection sheet (enhanced diffuser reflector) 68, LED control circuit (not shown) and circuit board (not shown).The backlight module 58 of LCD device 50 is made up of the optical thin film 56, photoconductive tube 60, enhanced specular reflectivity sheet 70, printed circuit board (PCB) 62, light emitting diode matrix 64,66 and the enhancement mode scattered reflection sheet 68 that are contained in the framework 72, and framework 72 includes front baffle and afterframe, be used for fixing backlight module 58, wherein light emitting diode matrix 64,66 both sides that are positioned over backlight module 58 make the light send from light emitting diode can penetrate the sidewall of photoconductive tube 60 and enter photoconductive tube 60.And, for fear of light leak, enhanced specular reflectivity sheet 70 must be set light emitting diode matrix 64,66 being fixed near the photoconductive tube 60, and the light reflected light conduit 60 that will have big incident angle, to improve light utilization efficiency.Hence one can see that, and in order to fix all optical modules and preferable effect to be provided, backlight module 58 is made up of many parts.Therefore, the package program of LCD device 50 shown in Figure 2 or backlight module 58 is very complicated and consuming time.
Hence one can see that, for industry, provides a kind of light source and a kind of simple structure with good result to remain an important problem to simplify assembling flow path.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of LCD and a kind of backlight module, to solve above-mentioned known problem.
According to claim of the present invention, a kind of LCD is disclosed, it includes light guide plate, is located at the liquid crystal panel on the light guide plate, framework and the striation that has frame wall and be used to place the compartment of light guide plate.This frame wall has opening and striation accommodation space, and this striation inserts the striation accommodation space.
The striation accommodation space that is inserted into framework from this striation as can be known, the invention provides at least four advantages: (1) reduces cost: no longer need shading rubber belt extra in the known technology or fluorescent tube reflex housing; (2) assembling easily: the striation of plug and play can be assembled on the framework simply, therefore can save manpower; (3) save spatial design:, therefore can provide the LCD or the backlight module at narrow edge because this striation is to be embedded in the frame wall of framework; And (4) light utilization efficiency height: be positioned at light source on this striation and paste mutually with light guide plate and be located at framework side by side, make all light that penetrate from light source can directly penetrate into light guide plate, and the dull thread leakage.
Description of drawings
Fig. 1 is the fragmentary cross-sectional view of known backlight module;
Fig. 2 for known be the diagrammatic cross-section of the backlight module of light source with the light emitting diode;
Fig. 3 is the diagrammatic cross-section of the LCD of first embodiment of the invention;
Fig. 4 is the synoptic diagram of backlight module shown in Figure 3;
Fig. 5 and 6 is the part enlarged drawing of backlight module shown in Figure 3;
Fig. 7 a and 7b are the directional property figure of light emitting diode shown in Figure 3;
Fig. 8 and 9 is the part enlarged drawing of backlight module shown in Figure 4;
Figure 10 is the framework of backlight module of second embodiment of the invention and the part synoptic diagram of striation;
Figure 11 is the framework of backlight module of third embodiment of the invention and the part synoptic diagram of striation;
Figure 12 and 13 is the framework of backlight module of fourth embodiment of the invention and the part synoptic diagram of striation; And
Figure 14 is the framework of backlight module of fifth embodiment of the invention and the part synoptic diagram of striation.
[primary clustering symbol description]
10 known backlight module 12 cold cathode fluorescent lamp pipes
14 light guide plate, 16 reflecting plates
18 optical thin films, 20 frameworks
22 fluorescent tube reflex housings, 24 shading rubber belts
50 LCD device, 52 housings
54 liquid crystal panels, 56 optical thin films
58 backlight modules, 60 photoconductive tubes
62 printed circuit board (PCB)s, 64 light emitting diode matrixs
66 light emitting diode matrixs, 68 enhancement mode scattered reflection sheets
70 enhanced specular reflectivity sheets, 72 frameworks
100 LCD, 102 liquid crystal panels
104 backlight modules, 106 housings
108 light guide plate, 110 printed circuit board (PCB)s
112 light emitting diodes, 114 striations
116 framework 116a fixed bands
116d opening 116e screw hole
118 optical thin films, 120 striation accommodation spaces
Narrow wide portion of 120b of 120a
122 reflector plates, 124 screws
126 screw holes, 128 conductive pads
130 screw holes, 132 screws
136 striation accommodation spaces, 138 wide portions
140 narrow 142 openings
Wide of 144 printed circuit board (PCB) 144a
148 striations, 150 printed circuit board (PCB)s
Wide 150b leptoprosopy of 150a
152 light emitting diodes, 154 striation accommodation spaces
156 striations, 158 openings
160 narrow adhesive tapes
Embodiment
Fig. 3 is the diagrammatic cross-section of the LCD 100 of first embodiment of the invention, and Fig. 4 is the synoptic diagram of backlight module 104 shown in Figure 3.LCD 100 of the present invention includes liquid crystal panel 102 and backlight module 104, and liquid crystal panel 102 in backlight module 104 is fixed in housing 106 to constitute LCD 100.Backlight module 104 includes framework 116 with frame wall 116c and compartment 116b, be arranged at light guide plate 108 in the compartment 116b, be arranged at the reflector plate 122 under the light guide plate 108 and insert in one of them frame wall 116c and be placed on the striation 114 on light guide plate 108 next doors.
Say that further the structure that framework 116 is formed in one, and have four the frame wall 116c and fixed band 116a that forms compartment 116b makes light guide plate 108 and reflector plate 122 be placed and be fixed in the compartment 116b, and on fixed band 116a.And framework 116 is made up of the material with highly reflective, is used for reflection ray, for example plastic material of white material or light color.Perhaps, the also available black material of framework 116 forms to avoid light leak.In addition, the frame wall 116c that is used for placing striation 114 in the framework 116 has opening 116d, and on frame wall 116c, form striation accommodation space 120, make striation 114 to insert striation accommodation space 120, and be placed on light guide plate 108 next doors through opening 116d.Striation 114 is the striation of plug and play (plug-and-play), it includes substrate or printed circuit board (PCB) 110 and a plurality of light source or light emitting diodes 112 that place on the printed circuit board (PCB) 110, and wherein light emitting diode 112 is preferably white light profile form light emitting diode.
And the reflector plate 122 that is arranged under the light guide plate 108 is used for and will penetrates the light reflection of light guide plate 108 lower surfaces.In addition, for striation 114 is securely fixed on the frame wall 116c, screw 124 is fixed on striation 114 on the framework 116 through screw hole from the bottom surface of framework 116 at least.In addition, for good planar light source is provided, backlight module 104 can add a plurality of optical thin films 118 in addition on light guide plate 108, for example diffusion sheet or prismatic lens, and optical thin film 118 can be arranged in the other or compartment 116b of frame wall 116c.
With reference to figure 5 and 6 and Fig. 7 a and 7b.Fig. 5 and 6 and Fig. 7 a and 7b be respectively the enlarged drawing of backlight module 104 and the directional property figure of light emitting diode 112.The lateral surface 115 of striation 114 is not covered by frame wall 116c, that is to say that the outside of striation 114 is exposed in the framework 116.Because striation 114 inserts among the frame wall 116c and the contiguous compartment 116b that is provided with light guide plate 108, the light-emitting area of light emitting diode 112 can be quite near light guide plate 108, make the light that sends from light emitting diode 112 directly be penetrated the sidewall of light guide plate 108, and planar light source is provided.In addition, according to Fig. 7 a and 7b, no matter be the X-axis or the Y-axis of light emitting diode 112, emission angle is almost nil greater than the relative luminous intensity of the light emitting diodes 112 of 80 degree, and emission angle greater than the relative luminous intensity of the light emitting diodes 112 of 60 degree then less than 50.Therefore, be applied to scattering angle that profile form light emitting diode 112 of the present invention has and be ± 80 degree approximately, be preferably degree approximately ± 60.This represents that the total scattering angle of each light emitting diode 112 is 120 degree, therefore, because light emitting diode 112 is for having directional property, so employed fluorescent tube reflex housing no longer needs the present invention in known technology, and when scattering angle is little, shading rubber belt extra in the traditional backlight module can be left in the basket, because the high angle scattered light of being launched by light emitting diode 112 is considerably less.And even the light with large angle scattering angle that is penetrated by light emitting diode 112 can directly not penetrate into light guide plate 108, framework 116 equally can stop light, and avoids light to penetrate backlight module 104.For instance, if framework 116 is to make with white material, and the light that advances to the framework 116 of light emitting diode 112 tops can be reflected back toward light guide plate 108, thereby improves light utilization efficiency; On the other hand, if framework 116 is made with black material, the light that advances to the framework 116 of light emitting diode 112 tops then can be absorbed by framework 116, thereby avoids the light leak problem.Hence one can see that, and apparatus of the present invention do not need extra fluorescent tube reflex housing or shading rubber belt, and also therefore simplification of assembling flow path, more can conservation.
With reference to figure 8 and 9.Fig. 8 and 9 is the part enlarged drawing of backlight module 104.Fig. 8 is the back side of backlight module 104, and wherein reflector plate 122 is arranged in the compartment 116b of framework 116.124 on screw is used for striation 114 is fixed in the striation accommodation space 120, and the screw hole 116e that sees through on the framework 116 from the back side fixes.In addition, it should be noted that opening 116d includes two narrow 120a and a wide 120b between narrow 120a.In order to hold striation 114, the height h of narrow 120a be near or less times greater than the thickness of printed circuit board (PCB) 110, and the height H of wide 120b be near or less times greater than the gross thickness of printed circuit board (PCB) 110 and light emitting diode 112.
On the other hand, Fig. 9 is the front of backlight module 104.In different embodiment, it is fixing with striation 114 that screw 132 can see through the screw hole 130 of framework 116 from the front of backlight module 104.Therefore, screw hole 126 can be set on printed circuit board (PCB) 110, to be used for being provided with screw 132.In addition, because striation 114 is the striation of plug and play, therefore it comprises conductive pad 128 at least, conductive pad 128 is arranged on the printed circuit board (PCB) 110, so after striation 114 inserts striation accommodation space 120, conductive pad 128 promptly can be electrically connected to lead (not shown), and lead can be arranged in the framework 116 or be electrically connected to pliable printed circuit (not shown).
Figure 10 to 14 is the part synoptic diagram of the backlight module 104 of various embodiments of the invention, and for the purpose of simplifying the description, the assembly shown in wherein most assembly and Fig. 3 to 9 has same-sign.With reference to Figure 10.Figure 10 is the second embodiment of the present invention.The frame wall 116c of framework 116 has the opening 116d that forms striation accommodation space 136 on frame wall 116c, and opening 116d includes staggered a plurality of narrow 140 and a plurality of wide 138.In order to hold striation 114, narrow 140 height h be near or less times greater than the thickness of the printed circuit board (PCB) 110 of striation 114, and wide 138 height H be approaching or less times greater than the gross thickness of a printed circuit board (PCB) 110 and a light emitting diode 112.Therefore, when striation 114 inserted striation accommodation spaces 136, striation 114 can be firmly fixed and can level not traversing.In addition, wide 138 width be near or less times greater than the width of light emitting diode 112.
With reference to Figure 11.Figure 11 is the synoptic diagram of framework 116 and striation 148 of the backlight module 104 of third embodiment of the invention.In this embodiment, the striation 148 of plug and play includes printed circuit board (PCB) 144 and a plurality of light emitting diode 146 that places on the printed circuit board (PCB) 144, wherein printed circuit board (PCB) 144 has a wide at least 144a and leptoprosopy 144b at least, wide 144a is parallel to the light guide plate that is arranged among the compartment 116b, and leptoprosopy 144b is parallel to frame wall 116c.It should be noted that light emitting diode 146 is positioned on the leptoprosopy 144b, so the gross thickness of striation 148 is more less than previous embodiment.Therefore, the height that is positioned at the opening 142 on the frame wall 116c can be smaller, and is similar identical with the thickness of printed circuit board (PCB) 144, that is to say that the height of opening 142 is equal to or greater than the thickness of striation 148.
Figure 12 and 13 is the synoptic diagram of framework 116 and striation 156 of the backlight module 104 of fourth embodiment of the invention.This embodiment utilizes top type light emitting diode 152 to form striation 156.The striation 156 of plug and play includes the printed circuit board (PCB) 150 that is used to place light emitting diode 152, and printed circuit board (PCB) 150 has two wide 150a and two leptoprosopy 150b.Because light emitting diode 152 is the top type, so light emitting diode 152 can be placed printed circuit board (PCB) 150 in the face of on wide the 150a of light guide plate 108.Therefore, as shown in figure 13, when striation 156 was inserted into striation accommodation space 154, wide the 150a that no light emitting diode is placed was parallel to frame wall 116c, and the height of striation accommodation space 154 almost the width with wide 150a of printed circuit board (PCB) 150 is identical.And for striation 156 is fixed in the striation accommodation space 154, available a plurality of narrow adhesive tapes 160 or a wide adhesive tape (not shown) are attached to printed circuit board (PCB) 150 on the frame wall 116c.
Figure 14 is the synoptic diagram of framework 116 and striation 114 of the backlight module of fifth embodiment of the invention.Identical in the employed striation 114 of this embodiment and first embodiment of the invention, wherein striation 114 includes printed circuit board (PCB) 110, a plurality of profile form light emitting diode 112, screw hole or pilot hole 126 and the conductive pad 128 that is positioned on the printed circuit board (PCB) 110.Opening 158 that it should be noted that the framework 116 that forms the striation accommodation space is the square opening.And the height of opening 158 near or less times greater than the gross thickness of a printed circuit board (PCB) 110 and a light emitting diode 112.
Advantage of the present invention is that the striation of plug and play is positioned in the striation accommodation space, makes that extra shading rubber belt or fluorescent tube reflex housing no longer needs in the known technology.Moreover light source is the structure that the framework of plug and play pattern light source and backlight module is formed in one.Therefore, can reduce the raw material of framework, and come assembling backlight module to be very easy to simply, so can save the manpower of assembling backlight module by the plug and play striation being inserted the striation accommodation space.In addition, because striation is inserted in the frame wall of framework, whole backlight module thereby can have narrow limit is in order to place light source.On the other hand, because the striation that inserts in the frame wall almost is being close to the light guide plate setting, so the light that comes out from light source can directly penetrate into light guide plate and have less light to miss.
Combine, with respect to known technology, LCD of the present invention or backlight module have at least reduce cost, assemble easily, saving space and light utilization advantages of higher.Therefore, can provide according to the present invention and have simple in structure and respond well LCD and backlight module.
The above only is the preferred embodiments of the present invention, and equivalent variations and modification that all are made in claim scope of the present invention all should belong to covering scope of the present invention.
Claims (10)
1. LCD includes:
Light guide plate;
Liquid crystal panel, it is arranged on the described light guide plate;
Framework, it has compartment and the frame wall that is used for placing described light guide plate, and described frame wall has opening and striation accommodation space (light bar cavity); And
Striation, it sees through described opening and inserts within the described striation accommodation space.
2. LCD as claimed in claim 1, wherein said striation include substrate and the light source that is arranged on the described substrate surface.
3. LCD as claimed in claim 2, wherein said substrate are printed circuit board (PCB).
4. LCD as claimed in claim 2, wherein said substrate includes conductive pad.
5. LCD as claimed in claim 2, wherein said light source are light emitting diode.
6. LCD as claimed in claim 5, wherein said light emitting diode are profile form light emitting diode, top type light emitting diode or white light emitting diode.
7. LCD as claimed in claim 2, the angle of divergence of wherein said light source are ± 60 degree.
8. LCD as claimed in claim 1, wherein said framework is made up of material with highly reflective or white material.
9. LCD as claimed in claim 1, wherein said framework is made up of light absorbent or black material.
10. backlight module includes:
Light guide plate;
Framework, it has compartment and the frame wall that is used to place described light guide plate, and described frame wall has opening and striation accommodation space; And
Striation, it sees through described opening and inserts described striation accommodation space, and the outside of wherein said striation is exposed in the described framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101636611A CN101191950A (en) | 2006-12-01 | 2006-12-01 | Backlight module and LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101636611A CN101191950A (en) | 2006-12-01 | 2006-12-01 | Backlight module and LCD device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101191950A true CN101191950A (en) | 2008-06-04 |
Family
ID=39487025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101636611A Pending CN101191950A (en) | 2006-12-01 | 2006-12-01 | Backlight module and LCD device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101191950A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988993B (en) * | 2009-07-30 | 2013-05-22 | 瀚宇彩晶股份有限公司 | Liquid crystal display device |
| CN105739173A (en) * | 2014-12-29 | 2016-07-06 | 乐金显示有限公司 | Mould Frame And Liquid Crystal Display Module Having Thereof |
-
2006
- 2006-12-01 CN CNA2006101636611A patent/CN101191950A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988993B (en) * | 2009-07-30 | 2013-05-22 | 瀚宇彩晶股份有限公司 | Liquid crystal display device |
| CN105739173A (en) * | 2014-12-29 | 2016-07-06 | 乐金显示有限公司 | Mould Frame And Liquid Crystal Display Module Having Thereof |
| US10241357B2 (en) | 2014-12-29 | 2019-03-26 | Lg Display Co., Ltd. | Mould frame and liquid crystal display module having thereof |
| CN105739173B (en) * | 2014-12-29 | 2019-12-06 | 乐金显示有限公司 | Die carrier and liquid crystal display module with same |
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Open date: 20080604 |