CN102042534A - Backlight module and large-sized ultrathin liquid crystal display television - Google Patents
Backlight module and large-sized ultrathin liquid crystal display television Download PDFInfo
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- CN102042534A CN102042534A CN2009102357883A CN200910235788A CN102042534A CN 102042534 A CN102042534 A CN 102042534A CN 2009102357883 A CN2009102357883 A CN 2009102357883A CN 200910235788 A CN200910235788 A CN 200910235788A CN 102042534 A CN102042534 A CN 102042534A
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Abstract
The invention relates to a backlight module and a large-sized ultrathin liquid crystal display television. The backlight module comprises a light guide panel, a backlight lamp, a light bar and a backing panel. The backlight lamp is of a light-emitting diode, arranged on the light bar and positioned on the side of the light guide panel, wherein the light bar is made of an aluminum substrate; the aluminum substrate sequentially comprises at least a metal substrate layer, an insulation layer and a line layer; the light-emitting diode is connected with the line layer; the surface of the metal substrate layer is adhered to the backing plate; a screw is inserted from the outer side of the backing panel and then is fixed on the metal substrate layer or the insulation layer of the aluminum substrate through the backing panel. The screw is inserted into the outer side of the backing panel so as to fix the light bar and the screw does not pass through the aluminum substrate, so that the space occupancy on the line layer in the aluminum substrate of the screw head is avoided and the area of the wiring region is increased as far as possible. The screw is inserted from the outer part, so that the backing panel and the light bar of the backlight module are convenient to disassemble. The large-sized liquid crystal display television is more convenient to assemble.
Description
Technical field
The present invention relates to the liquid crystal indicator technology, relate in particular to a kind of module backlight and large-size ultra-thin LCD TV.
Background technology
LCD TV is the flat panel TV that generally uses at present.Because liquid crystal can not self-luminous, provides light source so LCD TV can or be provided with module backlight by extraneous ray of reflecting.The LCD TV that module backlight is set can be described as the transmission-type liquid crystal TV, and its structure mainly comprises liquid crystal panel, module backlight, optical film and shell.
The backlight that is adopted in the tradition LCD TV backlight module is cold-cathode fluorescence lamp (CCFL).The color reducibility of CCFL is poor, contains harmful mercuryvapour.Light emitting diode (Light EmittingDiode; Hereinafter to be referred as: color reducibility LED) is good, the life-span is long, and does not conform to mercury, helps environmental protection.Adopt LED as backlight, color reducibility can reach national television system committee (National Television System Committee; Hereinafter to be referred as: NTSC) more than 105% of standard even 120%.And general CCFL fluorescent tube only can provide 72% of NTSC standard.With regard to drive circuit, traditional CCFL backlight, driver circuit is very complicated, and the driving voltage of kilovolt in the requirement utilizes special inverter (Inverter) to drive.And LED can low voltage operating, and it is comparatively convenient to control.The plurality of advantages of LED makes the LED-backlit scheme receive much concern.
Module backlight can be divided into straight-down negative and side-light type again according to the position difference of backlight.In the structure of side-light type module backlight, mainly comprise LGP, backlight and lamp bar.Backlight is placed on the side of LGP, is arranged with backboard in the outside of LGP and backlight, can attach reflector plate on the backboard usually or apply reflecting material to realize the light reflection.The white light that is produced by backlight is reflected onto in the LGP of being made by acryl.The major function of LGP is based on light principle at random and converts the directional light of incident to the planar light outgoing.The planar light of outgoing spreads through the diffuser plate in the optical film and is partial to, and the last optically focused prismatic lens that becomes continuous sawtooth channel form again via two surfaces makes light assemble and adjustment divergence of beam angle in the xy direction, finally makes light enter liquid crystal panel.
Direct-light-type backlight mainly comprises backlight, and backlight is arranged on the backboard, and over against the incidence surface setting of liquid crystal panel and optical film, back plate surface can similarly form reflecting surface, is around in the outside of backlight.After the diffusion and mixing of the light that backlight sends through diffuser plate in one section space length and the module backlight, become area source incident liquid crystal panel.Adopt the module backlight of straight-down negative design, if backlight too near the optical film of top, easily causes the light skewness.So need maintain a certain distance between backlight and the optical film.If adopt RGB (RGB) LED as direct-light-type backlight, then need longer light mixing distance.So the thickness of down straight aphototropism mode set often will be much larger than side-light type module backlight.When preparation ultra-thin LED module backlight, adopt the straight-down negative structure that integral thickness is had certain limitation.
For realizing the large-size ultra-thin LCD TV, prior art adopts side-light type module backlight to assemble the large scale liquid crystal TV, but there are the following problems: because the liquid crystal panel area is big, so more LED-backlit lamp need be set at the LGP side, LED is arranged on the lamp bar, and the driver circuit on the lamp bar increases thereupon.And LGP is thinner, and the LED lamp bar width of elongate in shape is limited, causes difficult wiring.And also need in the prior art to adopt screw to fix to lamp bar and backboard, screw is inserted from lamp bar one side, run through lamp bar and backboard to realize fixing, cause the area of head of screw to take certain wiring space like this, further increased difficult wiring.
Summary of the invention
The purpose of this invention is to provide a kind of module backlight and large-size ultra-thin LCD TV, to reduce the wiring difficulty of backlight bar driver circuit.
For achieving the above object, the invention provides a kind of module backlight, comprise LGP, backlight, lamp bar and backboard; Described backlight is a light emitting diode, is arranged on the described lamp bar, is positioned at the side of described LGP, wherein:
Described lamp bar is made by aluminium base, and described aluminium base comprises metal substrate layer, insulating barrier and line layer at least successively, and described light emitting diode is connected described line layer;
The surface of described metal substrate layer is attached on the described backboard, and screw penetrates from the outside of described backboard, passes metal substrate layer or insulating barrier that described backlight is fixed to aluminium base.
For achieving the above object, the present invention also provides the large-size ultra-thin LCD TV of a kind of the present invention of comprising module backlight, also comprises liquid crystal panel, optical film and shell, and wherein: described backboard is formed in one with described shell or fixedlys connected with described shell.
By above technical scheme as can be known, the present invention adopts from backboard outside insertion screw and fixes the lamp bar, and does not run through aluminium base, can avoid screw head to take the space on the line layer in the aluminium base on the one hand, can increase the area in wiring zone as far as possible; On the other hand, screw inserts the dismounting that can make things convenient for module dorsulum backlight and lamp bar from the outside, for large-sized LCD TV, is easier to install.
Description of drawings
The plan structure schematic diagram of the module backlight that Fig. 1 provides for the embodiment of the invention one;
Fig. 2 is the structure for amplifying schematic diagram in the dotted line circle among Fig. 1;
The fragmentary top TV structure schematic diagram of the module backlight that Fig. 3 provides for the embodiment of the invention two;
The structural representation of lamp bar in the module backlight that Fig. 4 provides for the embodiment of the invention three;
The large-size ultra-thin LCD TV that Fig. 5 provides for the embodiment of the invention four dissect sectional side TV structure schematic diagram.
The specific embodiment
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment one
The plan structure schematic diagram of the module backlight that Fig. 1 provides for the embodiment of the invention one, Fig. 2 are the structure for amplifying schematic diagram in the dotted line circle among Fig. 1.The module backlight that present embodiment provides comprises LGP 1, backlight 2, lamp bar 3 and backboard 4.Backlight 2 is LED, is arranged on the lamp bar 3, is positioned at the side of LGP 1, can be positioned at a side, dual-side or four side, and long side can be provided with two lamp bars 3.LED can certainly adopt the LED of other types according to concrete needs for adopting the white light LEDs of red green (RG) fluorescent material.LGP 1 is preferably the nanometer LGP, and its outward appearance is the same with common pure material acrylic, adds the nanoscale scattering material man-hour and can form nanometer LGP 1 adding, and the LED spot light can be converted to uniform surface light source efficiently.
Wherein, lamp bar 3 is specifically made by aluminium base, and this aluminium base comprises metal substrate layer 31, insulating barrier 32 and line layer 33 at least successively.Metal substrate layer 31 materials are preferably aluminium, can effectively reduce lamp bar 3 temperature, improve radiating effect.LED is connected line layer 33, can be by welding to be connected conducting with the backlight drive circuit.The surface of this metal substrate layer 31 is attached on the backboard 4, and screw 5 penetrates from the outside of backboard 4, passes backboard 4 and is fixed in the metal substrate layer 31 or insulating barrier 32 of aluminium base, and screw 5 does not contact with line layer 31, and screw 5 does not run through aluminium base.Preferably the tail end of screw 5 is positioned at the middle part of metal substrate layer 31, maybe can be arranged in insulating barrier 32.Can control by the screw thread of in aluminium base, placing appropriate depth and not run through aluminium base.
Adopt technique scheme, insert screw from the outside and fix the lamp bar, and do not run through aluminium base, can avoid screw head to take the space on the line layer in the aluminium base on the one hand, can increase the area in wiring zone as far as possible; On the other hand, screw inserts the dismounting that can make things convenient for module dorsulum backlight and lamp bar from the outside, for large-sized LCD TV, is easier to install.
Embodiment two
The fragmentary top TV structure schematic diagram of the module backlight that Fig. 3 provides for the embodiment of the invention two.Present embodiment can be based on the foregoing description one, and also comprise heat sink strip 6, be strip, heat sink strip 6 is attached to the outside of backboard 4, be the side that backboard 4 deviates from lamp bar 3, the position of heat sink strip 6 is corresponding with the position of lamp bar 3, and screw 5 passes backboard 4 from the outside of heat sink strip 6, arrive in the aluminium base, heat sink strip 6, backboard 4 and lamp bar 3 are fixed together.
By heat sink strip is set, make easier the dispersing of heat of LED lamp bar, LED lamp strip adoption aluminium also can improve radiating effect as the design of metal substrate layer.Heat sinking function is particularly important for the large-size ultra-thin LCD TV, owing to adopt side-light type module backlight, could satisfy the brightness demand of whole liquid crystal panel so need the brightness of raising side LED, the corresponding driving power that just needs to improve LED, the heat that distributes increases naturally, therefore is absolutely necessary for module backlight is provided with radiator structure.
Embodiment three
The structural representation of lamp bar in the module backlight that Fig. 4 provides for the embodiment of the invention three.Present embodiment can be based on embodiment one or embodiment two, and, the leading-out terminal 7 that connects on the aluminium base lamp bar 3 adopts flexible PCBs, and the backlight drive link tester of corresponding each output channel LED is crossed the lead-in wire that is provided with on the flexible PCB and linked to each other with the drive plate connector on the lamp bar 3.
For the large scale liquid crystal TV, the laying amount of LED is big, laying is intensive, for example, marginating compartment between the LED is about 0.5 millimeter, cause backlight drive circuits such as control line, data wire and power line many, especially the LED timesharing is lighted or when having different brightness, then need more backlight drive circuit when needs subregion control is respectively organized.But, when adopting side-light type module backlight,, for example, being about 4 millimeters usually because LGP is thinner, the available width of lamp bar is less, causes relatively difficulty of outlet, has hindered the realization of regional controllable function.Because the height of LED is less, for example, be about 0.7～1.5 millimeter usually again, preferably 1 millimeter is conserve space, and the space of the LGP side of reservation is very little, is difficult to place the drive plate connector.
Adopt the technical scheme of present embodiment, can adopt thickness to be used as leading-out terminal, then saved the leading-out terminal occupation space much smaller than ordinary circuit board and bent flexible PCB, and lead line flexibly.Can be under the limitation condition of narrow lamp bar, the backlight drive circuit of multichannels such as control line, data wire and power line being exported by the FPC lead-in wire is connected to outside drive plate connector, and multichannel control line, data wire and power line output can be provided.By driving control panel, the electric current of every string LED is all accurately controlled, to realize the Region control of backlight.Wherein, drive control panel and preferably can support pulse width modulation (Pulse Width Modulation; Hereinafter to be referred as: PWM) light modulation.
In concrete the application, each backlight drive circuit belongs to a plurality of output channels, is connected to the drive plate connector by FPC.The output channel quantity that drives control panel can change according to load.The position of the leading-out terminal of LED lamp bar can be arranged on centre, two ends or other position of lamp bar.LED lamp bar can be provided with a plurality of leading-out terminals.The FPC of each leading-out terminal can have a plurality of output channels.
In the module backlight of present embodiment, the lamp strip adoption aluminium base design, the thermal conductivity that aluminium base is good can effectively reduce the temperature of lamp bar; The leading-out terminal of lamp bar has adopted the FPC design, is convenient to drawing of multichannel circuit.By the driving control panel, and then realize the regional controlled of whole ultra-thin LED backlight.
In the module backlight of various embodiments of the present invention, the distribution of lamp bar and LED is not limited to shown in the figure, and for example, the number of LED lamp bar can have multiple combination, side at LGP can be set up in parallel for two lamp bars, is connected to the drive plate connector by FPC.
Embodiment four
The large-size ultra-thin LCD TV that Fig. 5 provides for the embodiment of the invention four dissect sectional side TV structure schematic diagram.This large-size ultra-thin LCD TV comprises module backlight of the present invention, also comprises liquid crystal panel 30, optical film 20 and shell 40.Wherein, backboard 4 is formed in one with shell 40 or fixedlys connected with shell 40.Be the part that backboard 4 can be shell 40, preferably keep backboard 4 to be exposed to and be easy to heat radiation in the external environment.
The module backlight that large-size ultra-thin LCD TV of the present invention can adopt the arbitrary embodiment of the present invention to be provided, adopt side-light type module backlight to help ultra-thinization of LCD TV, and can also solve heat dissipation problem, and realize the regional controlled of backlight in the large-size ultra-thin LCD TV.
Usually the shell of TV is to adopt plastic material to make, and the backboard of module backlight adopts the metal material preparation, backboard can be embedded among the through hole of shell so that be exposed in the external environment, also can in time dispel the heat air vent is set, makes the backboard and the heat sink strip that are enclosed in enclosure on shell.
Advantage of the present invention is conspicuous.Large scale side light type LED back light module, because a used LED number is more, it is intensive to arrange, and heat is more concentrated, and the higher LGP that causes easily of LED lamp bar temperature is out of shape.In addition, if do ultra-thin module backlight, because the lamp bar is narrower, outlet is difficulty, is difficult to the control of realization to backlight.LED is if adopt scheme provided by the present invention not only can reduce the temperature of module backlight, improve radiating effect,, also can realize that luminance area is controlled even the thickness of module backlight is reduced to the quite thin level of side-light type, support the PWM light modulation simultaneously, thereby have tangible comprehensive advantage.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a module backlight comprises LGP, backlight, lamp bar and backboard; Described backlight is a light emitting diode, is arranged on the described lamp bar, is positioned at the side of described LGP, it is characterized in that:
Described lamp bar is made by aluminium base, and described aluminium base comprises metal substrate layer, insulating barrier and line layer at least successively, and described light emitting diode is connected described line layer;
The surface of described metal substrate layer is attached on the described backboard, and screw penetrates from the outside of described backboard, passes metal substrate layer or insulating barrier that described backlight is fixed to aluminium base.
2. module backlight according to claim 1 is characterized in that, also comprises: heat sink strip, be attached to the outside of described backboard, the position of described heat sink strip is corresponding with the position of described lamp bar, and described screw passes described backboard from the outside of described heat sink strip, arrives in the described aluminium base.
3. module backlight according to claim 2 is characterized in that: the material of described heat sink strip is an aluminium.
4. module backlight according to claim 2 is characterized in that: the shape of described heat sink strip is identical with the shape of described lamp bar.
5. module backlight according to claim 2, it is characterized in that: the leading-out terminal that connects on the described aluminium base adopts flexible PCB, and the backlight drive link tester of corresponding each output channel light emitting diode is crossed the lead-in wire that is provided with on the described flexible PCB and linked to each other with the drive plate connector on the described lamp bar.
6. module backlight according to claim 1 is characterized in that: the thickness of described LGP is 4 millimeters, and the marginating compartment between the described light emitting diode is 0.5 millimeter, and the height of described light emitting diode is 0.7～1.5 millimeter.
7. a large-size ultra-thin LCD TV that comprises the arbitrary described module backlight of claim 1～6 also comprises liquid crystal panel, optical film and shell, it is characterized in that: described backboard is formed in one with described shell or fixedlys connected with described shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102357883A CN102042534A (en) | 2009-10-15 | 2009-10-15 | Backlight module and large-sized ultrathin liquid crystal display television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102357883A CN102042534A (en) | 2009-10-15 | 2009-10-15 | Backlight module and large-sized ultrathin liquid crystal display television |
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| CN102042534A true CN102042534A (en) | 2011-05-04 |
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| CN2009102357883A Pending CN102042534A (en) | 2009-10-15 | 2009-10-15 | Backlight module and large-sized ultrathin liquid crystal display television |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013007064A1 (en) * | 2011-07-09 | 2013-01-17 | 深圳市华星光电技术有限公司 | Backlight module and backlight device |
| CN102901001A (en) * | 2011-07-25 | 2013-01-30 | 精工爱普生株式会社 | Illumination apparatus, display apparatus, and electronic device |
| CN103104868A (en) * | 2012-08-15 | 2013-05-15 | 青岛海信电器股份有限公司 | Light emitting diode (LED) backlight unit and electronic device |
| CN103629603A (en) * | 2013-12-16 | 2014-03-12 | 中航华东光电有限公司 | High-brightness and wide-color-gamut direct type backlight module and liquid crystal display applying module |
| WO2014079030A1 (en) * | 2012-11-22 | 2014-05-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| US8770822B2 (en) | 2011-07-09 | 2014-07-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and a backlight device |
| CN104566045A (en) * | 2015-01-27 | 2015-04-29 | 创维液晶器件(深圳)有限公司 | Direct-lit backlight module and assembling method thereof |
| WO2016077993A1 (en) * | 2014-11-18 | 2016-05-26 | 何素华 | Led light strip and led television |
| CN106054469A (en) * | 2016-05-31 | 2016-10-26 | 深圳市华星光电技术有限公司 | Ultrathin type liquid crystal display (LCD) |
| WO2017190384A1 (en) * | 2016-05-06 | 2017-11-09 | 深圳市华星光电技术有限公司 | Display apparatus, backlight unit and mounting bracket thereof |
| CN110488536A (en) * | 2019-08-27 | 2019-11-22 | 深圳市泰坦士科技有限公司 | A kind of liquid crystal display device |
| WO2021135589A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳Tcl数字技术有限公司 | Positioning piece, back plate assembly and installation method therefor, and display device |
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2009
- 2009-10-15 CN CN2009102357883A patent/CN102042534A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013007064A1 (en) * | 2011-07-09 | 2013-01-17 | 深圳市华星光电技术有限公司 | Backlight module and backlight device |
| US8770822B2 (en) | 2011-07-09 | 2014-07-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and a backlight device |
| CN102901001A (en) * | 2011-07-25 | 2013-01-30 | 精工爱普生株式会社 | Illumination apparatus, display apparatus, and electronic device |
| CN102901001B (en) * | 2011-07-25 | 2017-03-22 | 精工爱普生株式会社 | Illumination apparatus, display apparatus, and electronic device |
| CN103104868A (en) * | 2012-08-15 | 2013-05-15 | 青岛海信电器股份有限公司 | Light emitting diode (LED) backlight unit and electronic device |
| CN103104868B (en) * | 2012-08-15 | 2015-09-09 | 贵阳海信电子有限公司 | A kind of LED-backlit module and electronic equipment |
| WO2014079030A1 (en) * | 2012-11-22 | 2014-05-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN103629603A (en) * | 2013-12-16 | 2014-03-12 | 中航华东光电有限公司 | High-brightness and wide-color-gamut direct type backlight module and liquid crystal display applying module |
| WO2016077993A1 (en) * | 2014-11-18 | 2016-05-26 | 何素华 | Led light strip and led television |
| CN104566045A (en) * | 2015-01-27 | 2015-04-29 | 创维液晶器件(深圳)有限公司 | Direct-lit backlight module and assembling method thereof |
| WO2017190384A1 (en) * | 2016-05-06 | 2017-11-09 | 深圳市华星光电技术有限公司 | Display apparatus, backlight unit and mounting bracket thereof |
| CN106054469A (en) * | 2016-05-31 | 2016-10-26 | 深圳市华星光电技术有限公司 | Ultrathin type liquid crystal display (LCD) |
| WO2017206284A1 (en) * | 2016-05-31 | 2017-12-07 | 深圳市华星光电技术有限公司 | Ultrathin liquid crystal display |
| US10185186B2 (en) | 2016-05-31 | 2019-01-22 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Ultra-thin liquid crystal display |
| CN106054469B (en) * | 2016-05-31 | 2020-04-10 | 深圳市华星光电技术有限公司 | Ultra-thin liquid crystal display |
| CN110488536A (en) * | 2019-08-27 | 2019-11-22 | 深圳市泰坦士科技有限公司 | A kind of liquid crystal display device |
| WO2021135589A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳Tcl数字技术有限公司 | Positioning piece, back plate assembly and installation method therefor, and display device |
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Application publication date: 20110504 |