CN1303463C - Backlight module assembling frame structure - Google Patents

Backlight module assembling frame structure Download PDF

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Publication number
CN1303463C
CN1303463C CNB031362656A CN03136265A CN1303463C CN 1303463 C CN1303463 C CN 1303463C CN B031362656 A CNB031362656 A CN B031362656A CN 03136265 A CN03136265 A CN 03136265A CN 1303463 C CN1303463 C CN 1303463C
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CN
China
Prior art keywords
light guide
guide plate
edge
assembling frame
backlight module
Prior art date
Application number
CNB031362656A
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Chinese (zh)
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CN1549026A (en
Inventor
林精皇
詹展昌
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统宝光电股份有限公司
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Priority to CNB031362656A priority Critical patent/CN1303463C/en
Publication of CN1549026A publication Critical patent/CN1549026A/en
Application granted granted Critical
Publication of CN1303463C publication Critical patent/CN1303463C/en

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Abstract

The present invention provides an assembling frame structure of back light modules, which can be used for firmly assembling and fastening components of back light modules, and the present invention provides certain deformation amount to overcome the influence of use states or environmental factors on the back light modules. An assembling frame of the present invention is provided with a flexible fastening sheet which is abutted on one side edge of a light guide plate, and the present invention also provides deformation amount of the light guide plate after the imbibition to maintain the fastening relationship of the light guide plate in use states or under environmental conditions of high temperature, high humidity, etc.

Description

Backlight module assembling frame structure

Technical field

The present invention relates to a kind of assembling frame structure, it uses the flat member of assembling multilayer, as the backlight module that is made of reflector plate, light guide plate and blooming piece etc.

Background technology

LCD (Liquid Crystal Display, LCD) by LCD MODULE (LiquidCrystal Module, LCM) and backlight module (Back Light Module) form, because liquid crystal itself can be not luminous, therefore provide LCD MODULE required light source by backlight module, to reach the purpose of demonstration; Backlight module in the LCD mainly by light emitting source (as cold-cathode fluorescence lamp (ColdCathode Fluorescent Lamp, CCFL)), metal photomask, reflector plate (Reflector), light guide plate (Light Guide Panel, LGP), multi-disc blooming piece (film, as diffusion sheet (Diffuser)), plastic frame (Plastics frame) and metal outer frame assemblies such as (Metal frame) constitute, wherein the light guide plate in the backlight module utilizes the method for injection mo(u)lding with polymethylmethacrylate (Polymethylmethacrylate, PMMA) be pressed into ganoid square plate, square plate one side is a webbing, and it is gradually thin to opposite side by webbing, then with having the high reflection and the material of extinction not, mode in the bottom surface of light guide plate with screen painting stamps the diffusion point, the corresponding light emitting source of thick end with the light guide plate side, the light utilization reflection that light emitting source sent is toward thin end conduction, when light is run into the diffusion point, reflected light can be toward all angles diffusion, destroy conditioned reflex then by the positive injection moulding of light guide plate, utilize various densitys, diffusion point not of uniform size can make the light guide plate uniformly light-emitting; As mentioned above, the effect of light guide plate is to guide the scattering direction of light emitting source, to improve the briliancy of LCD MODULE, and guarantee the homogeneity of liquid crystal display mode Block Brightness, therefore the good excuse of light guide plate is very huge to the backlight module influence, and at present by the improvement of manufacture craft and material, light guide plate itself has had certain qualification rate, and again by good assembling, backlight module can provide LCD MODULE uniform light source.

Structure with backlight module, wherein metal photomask is arranged at a side of plastic frame, light emitting source then is arranged in the metal photomask, reflector plate, light guide plate and blooming piece are slightly less than plastic frame, reflector plate is placed the bottom of plastic frame earlier, continuous be embedded in metal photomask with the light guide plate webbing again, a plurality of blooming pieces then are and are stacked on the light guide plate; Plastic frame promptly limits light guide plate X-axis and Y direction freedom of motion, in addition be formed with the cramp that extends internally with respect to the corner of metal photomask at plastic frame, to fasten the edge of light guide plate, freedom of motion with the restriction Z-direction, light guide plate is limited in the plastic frame, last metal outer frame is coated on outside the plastic frame again, forms backlight module.

Its package assembly of above-mentioned backlight module must be noted that the first, the distance relation of light guide plate webbing and light emitting source, wherein light guide plate must and light emitting source between maintain a certain distance, make the light source that light emitting source sent can enter in the light guide plate; The second, the syntagmatic of light guide plate webbing and metal photomask, wherein the light guide plate webbing must be embedded in the metal photomask fully, is shed by joining place with the light of avoiding light emitting source.Above-mentioned two problems can achieve a solution by the accurate control of size relationship basically, such as the size relationship of the size of light guide plate and plastic frame, the size relationship of metal photomask and the chimeric position of light guide plate, and the fastening of cramp and light guide plate relation; But it is in fact really not so, for example the material characteristic of light guide plate, the user mode or the environmental baseline of LCD, all might change the size relationship that sets, can not cause damage in order to ensure backlight module because of user mode or environmental baseline, therefore the manufacturing plant of backlight module can carry out user mode test and environment trust test usually, under user mode or in the environment of high temperature, high humility, can overcome the influence that backlight module is produced with test; With light guide plate; after absorbing moisture, understand dilatational strain with the light guide plate that polymethylmethacrylate is pressed into; generally speaking the expansion coefficient of polymethyl methacrylate materials is about 3/1000ths; be dilatable problem behind the solution light guide plate absorption moisture; the matching relationship of light guide plate and plastic frame can be reserved certain clearance (gap) usually; with under the environment of high humility, make light guide plate have certain expansion space, avoid light guide plate after imbibition, to be upturned.Yet the design in this gap exists suitable problem, as this clearance distance is strengthened, can become big so that plastic frame is accepted the factor of environmental baseline, but the relative factor of accepting user mode diminishes, opposite, this clearance distance is dwindled, can become big so that plastic frame is accepted the factor of user mode, but the relative factor of accepting environmental baseline diminishes, for instance, liquid crystal display applications is on notebook, and notebook often need carry and go out, or the display of notebook must start when using, or use the back to be closed, therefore this gap is the smaller the better certainly, break away from from metal photomask because of the action of display to avoid the light guide plate webbing in the backlight module, yet because of the gap less, when if notebook is used in high humility regional, its dilatational strain quantitative change of accepting light guide plate is little, and makes and light guide plate perk after distortion have a strong impact on display effect.

Summary of the invention

The plastic frame of existing backlight module and the gap between the light guide plate, problem because of size relationship, only can under user mode and environmental baseline, obtain an intermediate value as much as possible, and can't overcome actual use or following of environmental baseline really and may cause light guide plate to break away from or problem such as distortion, therefore the objective of the invention is to mainly provide a kind of can guarantee that light guide plate is unlikely and break away from from metal photomask, guarantee that light emitting source fully injects light guide plate, and also can accept the deflection that light guide plate is produced down because of high humidity environment, make the unlikely distortion perk of light guide plate, and influence display effect.

The object of the present invention is achieved like this, a kind of assembling frame structure of backlight module promptly is provided, fix a reflector plate, a light guide plate, multi-disc blooming piece and a photomask in order to assembling, wherein this photomask is arranged at a side of this assembling frame, and this reflector plate, this light guide plate and this each multi-disc blooming piece are arranged on this assembling frame in order, this assembling frame includes at least: an edge has a height, to take in this reflector plate, this light guide plate and this each multi-disc blooming piece; A plurality of support chips are extended internally by the bottom of this edge, put for this reflector plate, this light guide plate and this each multi-disc blooming piece; A plurality of cramps are arranged at the opposite side of this edge with respect to this photomask, and have towards horizontal direction extend flexible, and can fasten the apical margin that is placed in this light guide plate; And stop block and backstop groove, be arranged on this edge, this light guide plate has corresponding backstop groove and stop block, and when the webbing of light guide plate was embedded in this metal photomask, the backstop groove of this light guide plate and stop block were held in stop block and the backstop groove on this edge.

The present invention also provides a kind of assembling frame structure of backlight module, fix a reflector plate, a light guide plate, multi-disc blooming piece and a photomask in order to assembling, wherein this photomask is arranged at a side of this assembling frame, this reflector plate, this light guide plate and this multi-disc blooming piece are arranged on this assembling frame in order, this assembling frame includes at least: an edge, has a height, to take in this reflector plate, this light guide plate and this multi-disc blooming piece; Many support chips are extended internally by the bottom of this edge, put for this reflector plate, this light guide plate and this multi-disc blooming piece; A plurality of cramps are arranged at the opposite side of this edge with respect to this photomask, and have towards horizontal direction extend flexible, to fasten the apical margin that is placed in this light guide plate; And a plurality of fins, be suspended in the two side apical margins that this edge is adjacent to this photomask, in order to fasten the apical margin that is placed in this light guide plate, to limit this light guide plate, wherein this edge has a plurality of fastening grooves, and this light guide plate has fixture block that should clamping groove, and this fin is arranged on this fastening groove.

The assembling frame structure of disclosed backlight module according to the present invention, it is a cubic framework haply, the quadrilateral of framework becomes to have the edge of a height, and the side at edge has a plurality of cramps, cramp has the flexible of horizontal direction extension, and edge is provided with a plurality of fins adjacent to two side apical margins of cramp in addition; Wherein the design of flexible cramp can with between between assembling frame and light guide plate apart from dwindling, to guarantee the fixed relationship of light guide plate, and when light guide plate is subjected to such environmental effects and is out of shape, absorb the deflection of light guide plate by flexible cramp, and fin is more lived the apical margin of light guide plate in two side pressure systems, two side position place backstop file effects are provided, keeping unlikely distortion perk of light guide plate or disengaging, and guarantee display effect.

The assembling frame structure of disclosed backlight module according to the present invention, overcome the problem of matching size between light guide plate and assembling frame, make the fixed relationship between light guide plate and assembling frame be maintained, and assembling frame also can be accepted light guide plate deflection to a certain degree, take into account external factors such as user mode and environmental baseline, increase substantially backlight module and carry out the qualification rate that user mode is trusted test and environment spare trust test, this backlight module is applied on the LCD of notebook use, also can accept more harsh user mode and environmental baseline, effectively improve product quality.

Description of drawings

Fig. 1 is the contexture synoptic diagram of a backlight module;

Fig. 2 is a schematic perspective view of the present invention;

Fig. 3 is the synoptic diagram of cramp among the present invention;

Fig. 4 is the combination synoptic diagram of group frame among the present invention and light guide plate;

Fig. 5 is another enforcement illustration of cramp among the present invention;

Fig. 6 A, Fig. 6 B are the synoptic diagram of fin among the present invention.

Embodiment

Disclosed assembling frame structure is applied to a backlight module according to the present invention, in order to the flat member of assembling as multilayers such as reflector plate, light guide plate and blooming pieces.As shown in Figure 1, be that a backlight module 10 is formed shown in the figure, backlight module 10 is made of assemblies such as light emitting source 11, metal photomask 12, reflector plate 13, light guide plate 14, multi-disc blooming piece 15,16,17, assembling frame 18 and metal outer frame (not shown); Wherein, assembling frame 18 is plastic material integrated injection molding one cubic framework (thin portion structure is detailed later), metal photomask 12 is arranged at a side of assembling frame 18,11 of light emitting sources are arranged in the metal photomask 12, reflector plate 13, light guide plate 14 and blooming piece 15,16,17 undersized is in assembling frame 18, reflector plate 13 is placed the bottom of assembling frame 18, be embedded in metal photomask 12 on one side with light guide plate 14 again and place on the reflector plate 13, and blooming piece 15,16,17 is to be stacked in regular turn on the light guide plate 14, last metal outer frame is coated on outside the assembling frame 18 again, promptly constitutes a backlight module 10 structures.In the backlight module 10, light guide plate 14 is pressed into a wedge shape plate body with polymethylmethacrylate, the webbing of one side is in order to accept the light of self-emitting light source 11, and light is evenly distributed on the light guide plate 14, the LCD MODULE (not shown) is provided good light source uniformly, and obtain good display effect, therefore light guide plate 14 must have good assembly relation with assembling frame 18, make light guide plate 14 can correctly accept the light of self-emitting light source 11, in addition, the light guide plate 14 that is pressed into polymethylmethacrylate, the dilatational strain amount of meeting about 3/1000ths after absorbing moisture, therefore except that need are guaranteed the assembly relation of light guide plate 14 and assembling frame 18, assembling frame 18 also must absorb light guide plate 14 because of deflection that environmental baseline produced, just can guarantee at user mode and high temperature, under the environmental baselines such as high humility, still can keep normal display quality.

Please consult shown in Figure 2 again, it shown in the figure organigram of assembling frame 18, wherein assembling frame 18 is made of the edge 181 of four sides and the support chip 182 that is extended internally by edge 181 bottoms at least, edge 181 has a height, so that reflector plate 13, light guide plate 14 and blooming piece 15,16,17 are accommodated in the assembling frame 18, consult shown in the figure edge 181 is limited edge 181a, 181b, 181c, 181d and support chip 182b, 182c, 182d, so that clearly demonstrate following pointed assembling position and relation; Wherein metal photomask 12 is installed in edge 181a, metal photomask 12 is a U font, the horizontal edge 181a that is fixed in, its inner ccontaining light emitting source 11, and the base of metal photomask 12 is greater than its top margin, make the base of metal photomask 12 can be used as the Support Position of edge 181a bottom, to place for reflector plate 13, light guide plate 14 and blooming piece 15,16,17 jointly with support chip 182b, 182c, 182d.

The webbing of light guide plate 14 is embedded in the metal photomask 14 fully, the light that light emitting source 11 is produced enters light guide plate 14 fully, but the webbing of light guide plate 14 must and 11 of light emitting sources keep a gap (can consult shown in Figure 4), so that light can correctly enter light guide plate 14, therefore be provided with a backstop groove 141 in the leading edge of two sides of light guide plate 14 webbings, also be provided with a stop block 142 (can consult shown in Figure 1) in backstop groove 141 rears, and it is relative in edge 181b, 181d is provided with corresponding stop block 1811b and backstop groove 1812b (edge 181d with corresponding), the webbing of light guide plate 14 is embedded in the metal photomask 12, backstop groove 141 and stop block 142 just are held in stop block 1811b and backstop groove 1812b, make light guide plate 14 webbings keep gap with light emitting source 11, and prevent that light guide plate 14 from moving to the direction of light emitting source 11 and strike light emitting source 11.

Position at edge 181b, 181d also is provided with reference column 1813b, 1814b, 1815d, the pilot hole 171,172,173 of this reference column 1813b, corresponding blooming piece 15,16,17 sides of 1814b, 1815d (is consulted shown in Figure 1, blooming piece 15,16 is identical with it), pilot hole 171,172,173 for blooming piece 15,16,17 is placed on reference column 1813b, 1814b, the 1815d, and blooming piece 15,16,17 is fixed on the assembling frame 18.

Because light guide plate 14 is slightly less than assembling frame 14 and is incorporated in the edge 181, and limit light guide plate 14 in X-axis and Y direction freedom of motion by edge 181, and the webbing of light guide plate 14 is embedded in the metal photomask 12, the webbing of light guide plate 14 also is limited in Z-direction, therefore design has a cramp 1811c (as shown in Figure 3) at edge 181c place, wherein cramp 1811c is suspended in edge 181c, and below cramp 1811c, be formed with a vacancy section 1812c, so that cramp 1811c has the flexible of horizontal direction to a certain degree, cramp 1811c can limit the freedom of motion of the featheredge Z-direction of light guide plate 14, so can make light guide plate 14 be fixed in the assembling frame 18.

Consult shown in Figure 4 further, reflecting plate 13 and light guide plate 14 are placed on the assembling frame 18, be subjected to the freedom of motion that edge 181 limits X-axis and Y direction all around, the webbing of light guide plate 14 is embedded in the metal photomask 12, and the featheredge of light guide plate 14 stretches under cramp 1811c, make light guide plate be limited the freedom of motion of Z-direction, and be fixed on the assembling frame 14 by metal photomask 12 and cramp 1811c; In order to absorb the deflection that light guide plate 14 is produced by environmental influence, need maintain a gap d between the featheredge of light guide plate 14 and edge 181c, to prevent under the environment of high temperature or high humility, light guide plate 14 distortion is squeezed and to the Z-direction perk, and since the designed cramp 1811c of the present invention have towards horizontal direction extend flexible, therefore this gap d can be minimum, even if when light guide plate 14 deforms, cramp 1811c will be subjected to the extruding of light guide plate 14 and slightly stretch out, make light guide plate 14 still unlikely to the Z-direction perk, and cramp can be kept the relation that fastens light guide plate 14, and this gap d is designed to minimum, also can make light guide plate 14 dwindle,, keep good leaded light relation with the unlikely disengaging metal photomask 12 of the webbing of guaranteeing light guide plate 14 in the amount of movement of Y direction.

See also shown in Figure 5ly, wherein on cramp 1811c, also can design the holding block that extends in this edge one day, make holding block directly push up the side of light guide plate 14 and do not stay the gap, more can guarantee the webbing of light guide plate 14 and the fixed relationship of metal photomask 12.

In addition, as previously mentioned the webbing of light guide plate 14 must with metal photomask 12 in keep fixed relationship, light guide plate 14 is if break away from from metal photomask 12, will make the light of light emitting source 11 shed and produces and dazzle light, and influence display quality; See also shown in Fig. 6 A, be the webbing of further guaranteeing aforementioned light guide plate 14 and the fixed relationship of metal photomask 12, go back straight forming in the top of backstop groove 1812b one fin that suspends 19 is arranged, fin 19 is in order to fasten the stop block 142 that is placed in light guide plate 14, limit the freedom of motion of light guide plate 14 jointly to provide, guarantee the webbing of aforementioned light guide plate 14 and the fixed relationship of metal photomask 12 in Z-direction.And for example shown in Fig. 6 B, wherein fin 19 also can a conjunction 20 and is fixed on the edge 181b.

Above-described is the present invention's preferred embodiment wherein only, is not to be used for limiting practical range of the present invention; Be that all equalizations of doing according to claim of the present invention change and modification, all contained by claim of the present invention.

Claims (8)

1. the assembling frame structure of a backlight module, fix a reflector plate, a light guide plate, multi-disc blooming piece and a photomask in order to assembling, wherein this photomask is arranged at a side of this assembling frame, this reflector plate, this light guide plate and this multi-disc blooming piece are arranged on this assembling frame in order, and this assembling frame includes at least:
One edge has a height, to take in this reflector plate, this light guide plate and this multi-disc blooming piece;
A plurality of support chips are extended internally by the bottom of this edge, put for this reflector plate, this light guide plate and this multi-disc blooming piece;
A plurality of cramps are arranged at the opposite side of this edge with respect to this photomask, and have towards horizontal direction extend flexible, to fasten the apical margin that is placed in this light guide plate; And
Stop block and backstop groove are arranged on this edge, and this light guide plate has corresponding backstop groove and stop block, and when the webbing of light guide plate was embedded in this metal photomask, the backstop groove of this light guide plate and stop block were held in stop block and the backstop groove on this edge.
2. the assembling frame structure of backlight module as claimed in claim 1, wherein this cramp is suspended in this edge, and is formed with a vacancy section in the cramp below, and it is flexible that this cramp is had.
3. the assembling frame structure of backlight module as claimed in claim 1, wherein this cramp is extended with a holding block in this edge, and this holding block withstands the side of this light guide plate.
4. the assembling frame structure of a backlight module, fix a reflector plate, a light guide plate, multi-disc blooming piece and a photomask in order to assembling, wherein this photomask is arranged at a side of this assembling frame, this reflector plate, this light guide plate and this multi-disc blooming piece are arranged on this assembling frame in order, and this assembling frame includes at least:
One edge has a height, to take in this reflector plate, this light guide plate and this multi-disc blooming piece;
Many support chips are extended internally by the bottom of this edge, put for this reflector plate, this light guide plate and this multi-disc blooming piece;
A plurality of cramps are arranged at the opposite side of this edge with respect to this photomask, and have towards horizontal direction extend flexible, to fasten the apical margin that is placed in this light guide plate; And,
A plurality of fins are suspended in the two side apical margins that this edge is adjacent to this photomask, in order to fastening the apical margin that is placed in this light guide plate, and limiting this light guide plate,
Wherein this edge has a plurality of backstop grooves, and this light guide plate has stop block that should the backstop groove, and this fin is arranged on this backstop groove.
5. the assembling frame structure of backlight module as claimed in claim 4, wherein this cramp is suspended in this edge, and is formed with a vacancy section below cramp, and it is flexible that this cramp is had.
6. the assembling frame structure of backlight module as claimed in claim 4, wherein this cramp is extended with a holding block in this edge, and this holding block withstands the side of this light guide plate.
7. the assembling frame structure of backlight module as claimed in claim 4, wherein this fin is directly molded on this edge.
8. the assembling frame structure of backlight module as claimed in claim 4, wherein this fin with a conjunction assembly in this edge.
CNB031362656A 2003-05-20 2003-05-20 Backlight module assembling frame structure CN1303463C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB031362656A CN1303463C (en) 2003-05-20 2003-05-20 Backlight module assembling frame structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB031362656A CN1303463C (en) 2003-05-20 2003-05-20 Backlight module assembling frame structure

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CN1549026A CN1549026A (en) 2004-11-24
CN1303463C true CN1303463C (en) 2007-03-07

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4244942B2 (en) * 2005-03-08 2009-03-25 セイコーエプソン株式会社 Liquid crystal device, lighting device, and electronic device
KR101232045B1 (en) * 2005-08-24 2013-02-12 삼성디스플레이 주식회사 Back light assembly and liquid crystal display apparatus having the same
KR101192756B1 (en) 2005-12-19 2012-10-18 엘지디스플레이 주식회사 liquid crystal display module
CN101165565B (en) * 2006-10-17 2010-12-08 奇美电子股份有限公司 Bump mechanism and backlight module applying same
TWI333105B (en) 2006-11-27 2010-11-11 Au Optronics Corp A backlight module and a optical slice unit support device thereof
CN100426070C (en) * 2006-12-04 2008-10-15 友达光电股份有限公司 Backlight module, and supporting set for optical sheet subassembly

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH09230336A (en) * 1996-02-20 1997-09-05 Hitachi Device Eng Co Ltd Liquid crystal display device
JPH1068826A (en) * 1996-07-23 1998-03-10 Internatl Business Mach Corp <Ibm> Bask light device for liquid crystal
JP2001338512A (en) * 2000-03-23 2001-12-07 Enplas Corp Surface light source equipment and image display equipment
JP2002091324A (en) * 2000-07-10 2002-03-27 Seiko Epson Corp Electrooptical device and method for manufacturing the same, liquid crystal apparatus and method for manufacturing the same, and electronic apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09230336A (en) * 1996-02-20 1997-09-05 Hitachi Device Eng Co Ltd Liquid crystal display device
JPH1068826A (en) * 1996-07-23 1998-03-10 Internatl Business Mach Corp <Ibm> Bask light device for liquid crystal
JP2001338512A (en) * 2000-03-23 2001-12-07 Enplas Corp Surface light source equipment and image display equipment
JP2002091324A (en) * 2000-07-10 2002-03-27 Seiko Epson Corp Electrooptical device and method for manufacturing the same, liquid crystal apparatus and method for manufacturing the same, and electronic apparatus

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