CN100573263C - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN100573263C CN100573263C CNB2004100618119A CN200410061811A CN100573263C CN 100573263 C CN100573263 C CN 100573263C CN B2004100618119 A CNB2004100618119 A CN B2004100618119A CN 200410061811 A CN200410061811 A CN 200410061811A CN 100573263 C CN100573263 C CN 100573263C
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- plate
- backlight module
- light guide
- guide plate
- panel
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Abstract
A backlight Module (Back Light Module) at least comprises a Back plate, a reflecting film and a high reflecting rubber frame. The back plate at least comprises a bottom plate and a side plate, and the first side of the side plate is jointed on the side edge of the bottom plate. The reflecting film is arranged on the upper surface of the bottom plate and the inner side surface of the side plate to replace the lamp tube reflecting cover. In addition, the high-reflection rubber frame is arranged on a second side opposite to the first side of the side plate.
Description
Technical field
The present invention relates to a kind of backlight module (Back Light Module), and particularly relate to a kind of side incident type (Edge type) backlight module.
Background technology
Backlight module is one of key part and component of display panels.Because liquid crystal itself can't be luminous, and the function of backlight module promptly is a light source abundant in supply brightness and that be evenly distributed, and then makes liquid crystal panel that normal and the well-balanced show image of brightness can be provided.
Please refer to Fig. 1, Fig. 1 is the structure cut-open view that illustrates the backlight module of available liquid crystal display module.The backlight module 100 of tradition LCD assembly is a kind of side incident type backlight module.This backlight module 100 comprises backboard 102, and its dorsulum 102 is made of base plate 104 and side plate 106, and side plate 106 is around base plate 104, and a side of side plate 106 engages one another with about 90 angles of spending with the side of base plate 104.Reflector plate 110 binds on the upper surface of base plate 104, in order to cold cathode fluorescent lamp (the Cold Cathode Fluorescent Lamp that light source is provided; CCFL) 114 be arranged on backboard 102 inside that are adjacent to side within the side plate 106, fluorescent tube reflex housing 112 then is the medial surface setting near side plate 106.Wherein, the position of fluorescent tube reflex housing 112 is between the side plate 106 of cold cathode fluorescent lamp 114 and backboard 102.The section shape of fluorescent tube reflex housing 112 is the U font, the bottom surface of fluorescent tube reflex housing 112 is near side plate 106, and the two sides of fluorescent tube reflex housing 112 then stretch out directly over base plate 104 and cold cathode fluorescent lamp 114 from the dual-side of the bottom surface of fluorescent tube reflex housing 112 respectively.
Be provided with reflector plate and fluorescent tube reflex housing in the backlight module of side incident type,, therefore become the cost burden of backlight module because the price height of fluorescent tube reflex housing accounts for 7% of whole backlight module cost.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of backlight module, reflector plate is configured in the backboard inside of this backlight module, and can replace the fluorescent tube reflex housing, and then can reduce the cost of backlight module.
Another object of the present invention is to provide a kind of backlight module of LCD assembly, the metal backing internal coat of this backlight module has one deck white reflection paint vehicle, and can replace reflector plate and fluorescent tube reflex housing.Thus, not only can reduce the cost of backlight module significantly, more directly be coated on the metal backing, and can utilize metal backing to reach the effect of direct heat radiation, and then improve the radiating efficiency of backlight module significantly owing to reflective film.
Another purpose of the present invention is to provide a kind of backlight module of LCD assembly, the base plate of the metal backing of this backlight module is provided with a plurality of spacers and corresponding to a plurality of holes of these spacers, then is provided with position and size on the reflector plate all corresponding to the perforate of these spacers.Therefore, reflector plate effectively can be fixed on the base plate of metal backing.
According to above-mentioned purpose of the present invention, a kind of backlight module is proposed, comprise at least: a backboard, wherein this backboard comprises a base plate and side plate at least, and one first side engagement of side plate is on the side of base plate; One light guide plate is configured in this backboard inside, and has a first surface in the face of this base plate; One light source is configured in this backboard inside, and is positioned at the side of this light guide plate; One blooming piece is configured on the second surface relative with this first surface of this light guide plate; One reflective film is configured on the medial surface of upper surface of base plate and side plate; And one high reflection glue frame be arranged on second side relative with first side of side plate, wherein, this light source, this light guide plate and this blooming piece are configured between this reflective film and this height reflection glue frame, and the part light that this light source is produced can see through this height reflection glue frame reflection and enter this light guide plate.
The present invention also proposes a kind of liquid crystal indicator, comprises at least:
One backlight module, wherein this backlight module comprises at least:
One backboard, wherein this backboard comprises a base plate and side plate at least, and one first side engagement of this side plate is on the side of this base plate;
One light guide plate is configured in this backboard inside, and has a first surface in the face of this base plate;
One light source is configured in this backboard inside, and is positioned at the side of this light guide plate;
One blooming piece is configured on the second surface relative with this first surface of this light guide plate;
One reflective film is configured on the medial surface of a upper surface of this base plate and this side plate; And
One high reflection glue frame is arranged on one second side relative with this first side of this side plate,
Wherein, this light source, this light guide plate and this blooming piece are configured between this reflective film and this height reflection glue frame, and the part light that this light source is produced can see through this height reflection glue frame reflection and enter this light guide plate.
One panel is positioned on this backlight module; And
One framework is positioned on this panel, and this framework combines with this backlight module, and this panel is fixed between this framework and this backlight module.
According to a preferred embodiment of the present invention, reflective film is anti-yellow and heat-resisting white reflection paint vehicle, and is coated on the inside of backboard.Thus, not only can replace the fluorescent tube reflex housing, more can replace reflector plate, and reduce the cost of backlight module significantly.In addition, on the base plate of backboard more punching press have several spacers to protrude in the upper surface of base plate, and on base plate, form corresponding holes.In these spacers at least a slice form bent angle at least one corner of base plate, and have otch, for example triangular incision corresponding to the corner of the light guide plate of the bent angle of base plate.Therefore, light guide plate is inserted backboard when inner, the collocation of the spacer of base plate and the otch of light guide plate not only has the crooked effect of preventing, but also effective lightguide plate fixing.On the other hand, the electrode of cold cathode fluorescent lamp can be arranged on the holes of part, is beneficial to the heat radiation of electrode.And owing to need not to be provided with the fluorescent tube reflex housing, so the line concentration path of connection line can be from the top of backlight module and at least one perforate via the upper surface of height reflection glue frame.Die, can improve the convenience of connection line line concentration.
Description of drawings
Fig. 1 is the structure cut-open view of the backlight module of available liquid crystal display module;
Fig. 2 is the structure cut-open view of a kind of backlight module of a preferred embodiment of the present invention;
Fig. 3 is the structure cut-open view of a kind of backlight module of another preferred embodiment of the present invention;
Fig. 4 is the schematic perspective view of a kind of backlight module of a preferred embodiment of the present invention;
Fig. 5 is the schematic perspective view of backboard downside of a kind of backlight module of a preferred embodiment of the present invention;
Fig. 6 is the top view of backboard downside of a kind of backlight module of a preferred embodiment of the present invention;
Fig. 7 goes out the thread path synoptic diagram for the connection line of a kind of backlight module of a preferred embodiment of the present invention.
Embodiment
The present invention discloses a kind of backlight module, replaces the fluorescent tube reflex housing by the internal configurations reflective film at metal backing, to reach the purpose of the cost that reduces backlight module.In order to make narration of the present invention more detailed and complete, can be with reference to the diagram of following description and cooperation Fig. 2 to Fig. 7.
Generally, liquid crystal indicator is made of panel, backlight module and framework, and wherein panel is positioned on the backlight module, and framework is positioned on the panel.Framework can be fixed on panel between framework and the backlight module with after backlight module combines, and finishes the basic framework of liquid crystal indicator.
Please refer to Fig. 2, Fig. 2 illustrates the structure cut-open view according to a kind of backlight module of a preferred embodiment of the present invention.Backlight module 200 is generally the key member of LCD assembly, and backlight module 200 mainly is made up of backboard 202, light guide plate 208, cold cathode fluorescent lamp 212, diffusion sheet 214 and glue frame 216.The material of backboard 202 is preferably high thermal conducting material, for example metal.In a preferred embodiment of the present invention, backboard 202 can be galvanized steel plain sheet, corrosion resistant plate and aluminium sheet.Backboard 202 comprises base plate 204 and side plate 206 at least, and a side engagement of its latus inframedium 206 is on the side of base plate 204, and the opposite side with respect to being bonded on base plate 204 sides of side plate 206 then constitutes the opening of backboard 202, as shown in Figure 4.The upper surface of the base plate 204 of backboard 202 and the inner surface of side plate 206 all are coated with reflective film 210.In the present invention, as shown in Figure 2, reflective film 210 is preferably with coating method and is coated in white reflection paint vehicle on the inner surface of the upper surface of base plate 204 and side plate 206, and this reflective film 210 more preferably has anti-yellow and heat-resisting character.In addition, reflective film 210 also can be in the mode of pasting and covers white reflector plate on the inner surface of the upper surface of base plate 204 and side plate 206, and as shown in Figure 3, wherein reflective film 210 preferably has anti-yellow and heat-resisting character.
In a preferred embodiment of the present invention, when reflective film 210 is a white reflector plate, for reaching the purpose of effective fixation reflex film 210, the base plate 204 of backboard 202 can utilize the mode of punching press base plate 204 to be convexly equipped with spacer 230 at the upper surface of base plate 204, extremely shown in Figure 7 as Fig. 4, and on reflective film 210 with respect to the position of spacer 230, size is set approximately greater than the perforate (not illustrating) of the side of spacer 230.Thus, when chaffy reflective film 210 is configured in backboard 202 inside, spacer 230 can insert the perforate of reflective film 210, base plate 204 effectively can be fixed in the position of reflective film 210, and make reflective film 210 not reason slide and produce locational skew.In addition, please refer to Fig. 4, the side plate 206 of backboard 202 more can be provided with a plurality of positioning convex points 220, wherein the formation of these positioning convex points 220 is to utilize impact style to stamp out several punching hole 218 inwardly from the lateral surface of side plate 206, can form a plurality of corresponding to punching hole 218 and to the positioning convex point 220 of external diffusion thus on the medial surface of side plate 206.On the chaffy reflective film 210 of position, the fixed orifice 238 of the scope that a plurality of undersized are constituted in positioning convex point 220 is set with respect to positioning convex point 220.Therefore, when chaffy reflective film 210 is installed in backboard 202 inside, fixed orifice 238 on the reflective film 210 can insert for corresponding positioning convex point 220, utilizes the positioning convex point 220 to external diffusion again, then the sidepiece of reflective film 210 can be fixed on the medial surface of side plate 206.
In preferred embodiment of the present invention, can a plurality of spacers 230 be set in base plate 204, some of spacers 230 can be positioned at least one corner of base plate 204, two relative angles that are preferably base plate 204 fall, and the spacer 230 that is positioned at the corner forms bent angle 228, arc bent angle for example, as shown in Figure 4.Wherein, bent angle 228 is formed by at least one spacer 230.In addition, be placed on the reflective film 210 of backboard 202 inside owing to light guide plate 208.Therefore, can be in light guide plate 208, base plate 204 corners corresponding to spacer 230 with bent angle 228, the corner of light guide plate 208 is provided with otch 226 relatively, triangular incision for example, and in base plate 204 corners of the spacer 230 that forms bent angle 228 of can being packed into smoothly in the corner of the otch 226 of light guide plate 208.Thus, the otch 226 in the corner of light guide plate 208 can form the anti-crooked design that light guide plate 208 is installed with the collocation of the bent angle 228 of the spacer 230 in base plate 204 corners.For example, if the corner of light guide plate 208 is subject to the spacer 230 that forms bent angle 228 when meeting at right angles shape, can't pack into and have for example base plate 204 corners of the spacer 230 of the bent angle 228 of arc in the rectangular-shaped corner of light guide plate 208.
Through punching press base plate 204 and after forming spacer 230 on the upper surface of base plate 204, base plate 204 itself can produce holes 232 with respect to spacer 230 places.Wherein, the size of holes 232 and corresponding spacer 230 is measure-alike.Cold cathode fluorescent lamp 212 is to place along the medial surface of the side plate 206 of backboard 202, and cold cathode fluorescent lamp 212 is between the sidepiece of the side of light guide plate 208 and reflective film 210, and wherein cold cathode fluorescent lamp 212 can be single fluorescent tube or many fluorescent tubes design.In addition, the pattern of cold cathode fluorescent lamp 212 can be linear pattern fluorescent tube or L type fluorescent tube.Whole cold cathode fluorescent lamp 212 devices have two groups of electrode of opposite polarity 222 and electrode 224.The position of holes 232 preferably is positioned at the corner of backboard 202, and corresponding with the position of electrode 224 with electrode 222.Because electrode 222 and electrode 224 are when backlight module 200 runnings, can produce more used heat, therefore electrode 222 is arranged on the holes 232 of backboard 202 with electrode 224, can make electrode 222 and electrode 224 easier heat radiations, and can increase substantially the radiating efficiency of electrode 222 and electrode 224.In addition, produce skew for fear of cold cathode fluorescent lamp 212 and slide, in the also configurable at least one lamp tube fixing seat of cold cathode fluorescent lamp 212, with fixing cold cathode fluorescent lamp 212.
Characteristics of the present invention are exactly can utilize on the inner surface of the upper surface of the base plate 204 of backboard 202 and side plate 206 coating or paste reflective film 210, and the glue frame 216 of the high reflection of collocation, the sharp reflection of the fairing that cold cathode fluorescent lamp 212 can be launched.Therefore, can effectively replace existing fluorescent tube reflex housing.Thus, can reduce the cost of backlight module 200.In preferred embodiment of the present invention, be used as reflective film 210 by coating white reflection paint vehicle on the inner surface of the upper surface of base plate 204 and side plate 206, and the glue frame 216 of the high reflection of collocation, can reduce the cost about 11%～13% of backlight module 200.On the other hand, because heat directly is passed on the coated backboard 202 of white reflection paint vehicle, adds backboard 202 and constituted, so can effectively improve the heat dissipation of backlight module 200 by highly heat-conductive material.
Please refer to Fig. 5 and Fig. 6, also can the lower surface that a plurality of screw holders (Boss) 234 protrude in base plate 204 be set on the base plate 204 of backboard 202 according to the device demand.By these screw holders 234, and utilize locked assembly, screw etc. for example, can be with external module, for example analog digital change-over panel (ADBoard), inverted rectifier (Inverter) and hinge (Hinge), lock respectively on the base plate 204 of backboard 202, for example the analog digital change-over panel on the base plate 204 locks position 244, inverted rectifier locks position 246 and hinge locks position 248.The surface that screw holder 234 engages with base plate 204 also is coated with white reflective film, leaks to prevent light.
Please refer to Fig. 7, cold cathode fluorescent lamp 212 also comprises several connection lines 236 at least, and the line concentration path of these connection lines 236 is preferably from the upper surface via the glue frame 216 of backlight module 200 tops.Can utilize the mode of injection mo(u)lding, several grooves 240 are set on the upper surface of glue frame 216, be beneficial to the line concentration of the connection line 236 of cold cathode fluorescent lamp 212, as Fig. 2, Fig. 3 and shown in Figure 7.In preferred embodiment of the present invention, the upper surface of glue frame 216 also has at least one perforate 242 to be passed through for connection line 236, is beneficial to line concentration, as shown in Figure 7.
By the invention described above preferred embodiment as can be known, an advantage of the present invention is exactly because by in the backboard internal configurations reflector plate of backlight module, can replace the fluorescent tube reflex housing of traditional backlight module, and then can reach the purpose of the cost that reduces backlight module.
By the invention described above preferred embodiment as can be known, another advantage of the present invention is exactly because one deck white reflection paint vehicle is arranged as reflective film by the metal backing internal coat at backlight module, can replace the reflector plate and the fluorescent tube reflex housing of general backlight module.Therefore, can reduce the cost of backlight module significantly.In addition, more, can utilize high heat conduction backboard to state the purpose of direct heat radiation thus, and then increase substantially the radiating efficiency of backlight module because reflective film is on the backboard that directly is coated in highly heat-conductive material and is constituted.
By the invention described above preferred embodiment as can be known, an advantage more of the present invention is exactly because the base plate of the backboard of backlight module is provided with a plurality of spacers and corresponding to a plurality of holes of these spacers, then is provided with position and size on the reflector plate all corresponding to the perforate of these spacers.Therefore, reflector plate can be fixed on the base plate of metal backing really and effectively.
Though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to qualification the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100618119A CN100573263C (en) | 2004-06-25 | 2004-06-25 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100618119A CN100573263C (en) | 2004-06-25 | 2004-06-25 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1713040A CN1713040A (en) | 2005-12-28 |
| CN100573263C true CN100573263C (en) | 2009-12-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100618119A Expired - Fee Related CN100573263C (en) | 2004-06-25 | 2004-06-25 | Backlight module |
Country Status (1)
| Country | Link |
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| CN (1) | CN100573263C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376983C (en) * | 2005-12-23 | 2008-03-26 | 友达光电股份有限公司 | Light source assembly and backlight module using same |
| CN101414074B (en) * | 2007-10-19 | 2011-08-17 | 群康科技(深圳)有限公司 | Backlight module unit and LCD device |
| CN101587262B (en) | 2008-05-23 | 2011-06-15 | 群康科技(深圳)有限公司 | Liquid crystal display (LCD) device |
| CN101749568B (en) * | 2008-12-01 | 2013-10-02 | 群康科技(深圳)有限公司 | Backlight module and manufacturing method thereof |
| CN101806434B (en) * | 2009-02-13 | 2014-06-18 | 群创光电股份有限公司 | Electronic device, liquid crystal display module and backlight unit thereof |
| CN102865523A (en) * | 2012-10-12 | 2013-01-09 | 深圳市华星光电技术有限公司 | Backlight module |
| CN104279465B (en) * | 2014-10-28 | 2016-07-06 | 合肥京东方光电科技有限公司 | Backlight module and display device |
| CN104407462A (en) * | 2014-12-02 | 2015-03-11 | 深圳市华星光电技术有限公司 | Liquid crystal display module and processing method thereof |
| CN104964213B (en) * | 2015-07-14 | 2018-06-08 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN110398861A (en) * | 2019-09-03 | 2019-11-01 | 东莞市利锦电子有限公司 | A plastic iron with reflector function |
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| US5815227A (en) * | 1995-12-27 | 1998-09-29 | Samsung Electronics Co., Ltd. | Backlight for liquid crystal display |
| US5831697A (en) * | 1995-06-27 | 1998-11-03 | Silicon Graphics, Inc. | Flat panel display screen apparatus with optical junction and removable backlighting assembly |
| CN1321910A (en) * | 2000-04-28 | 2001-11-14 | 三星电子株式会社 | Container module and liquid crystal display |
| US6390638B1 (en) * | 2000-02-10 | 2002-05-21 | Ide, Inc. | Bulb wrap using expanded polytetrafluoroethylene |
| CN1467549A (en) * | 2002-06-25 | 2004-01-14 | ���ǵ�����ʽ���� | Lamp assembly, backlight assembly and liquid crystal display with the backlight assembly |
| CN1495484A (en) * | 2002-09-17 | 2004-05-12 | Necһ��������ʽ���� | Backlight and liquid crystal display device |
-
2004
- 2004-06-25 CN CNB2004100618119A patent/CN100573263C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5831697A (en) * | 1995-06-27 | 1998-11-03 | Silicon Graphics, Inc. | Flat panel display screen apparatus with optical junction and removable backlighting assembly |
| US5815227A (en) * | 1995-12-27 | 1998-09-29 | Samsung Electronics Co., Ltd. | Backlight for liquid crystal display |
| US6390638B1 (en) * | 2000-02-10 | 2002-05-21 | Ide, Inc. | Bulb wrap using expanded polytetrafluoroethylene |
| CN1321910A (en) * | 2000-04-28 | 2001-11-14 | 三星电子株式会社 | Container module and liquid crystal display |
| CN1467549A (en) * | 2002-06-25 | 2004-01-14 | ���ǵ�����ʽ���� | Lamp assembly, backlight assembly and liquid crystal display with the backlight assembly |
| CN1495484A (en) * | 2002-09-17 | 2004-05-12 | Necһ��������ʽ���� | Backlight and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1713040A (en) | 2005-12-28 |
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Granted publication date: 20091223 Termination date: 20180625 |