CN100498470C - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN100498470C CN100498470C CNB2007101370928A CN200710137092A CN100498470C CN 100498470 C CN100498470 C CN 100498470C CN B2007101370928 A CNB2007101370928 A CN B2007101370928A CN 200710137092 A CN200710137092 A CN 200710137092A CN 100498470 C CN100498470 C CN 100498470C
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- framework
- bracket
- backlight module
- optical element
- accommodation space
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Abstract
The invention discloses an aphototropism module, which comprises the following parts: frame, optical element, floor, tray and light source, wherein the optical element is set in the frame; a containing space is formed between the optical element and one side of frame; the floor is connected with the frame, which are set under the optical element; the tray is connected with the frame and the lower rim of the floor to shield the containing space; the light source on the tray lies in the containing space; the tray can connect or separate the aphototropism module towards the floor bottom direction or along the opposite direction.
Description
Technical field
The present invention relates to a kind of backlight module, and be particularly related to a kind of backlight module that can simple and easy dismounting backlight.
Background technology
The photoelectricity correlation technique is constantly weeded out the old and bring forth the new in recent years, adds the arrival of digital times, and then has promoted the flourish of LCD market.LCD has the image quality height, volume is little, in light weight, driving voltage is low and advantages such as power consumption is low, therefore be widely used in PDA(Personal Digital Assistant), mobile phone, shoot with video-corder projector, notebook computer, desktop display, automobile-used display, and consumer communication or electronic product such as projection TV, and replace cathode-ray tube (CRT) gradually and become the main flow of display.
LCD (Liquid Crystal Display, LCD) be a kind of display device of utilizing liquid crystal characteristic to reach display effect, because its cathode-ray tube display more commonly used than tradition is having better elasticity aspect the dimension and weight, therefore, LCD often is used on the various pss at present, display screen on little mobile phone, personal digital assistant and the digital camera to big televisor and billboard, can be seen the shadow of LCD everywhere.
Existing LCD all designs towards light weight, thinning direction, especially is applicable to and can takes device, for example the LCD of notebook computer, personal digital assistant, mobile phone or the like.And at the same time, the reduction of material and making, assembly cost is also imperative, and wherein display panels is the design that light weight, thinning are carried out in the consideration of overall system design, and this often conflicts mutually with display panels self structure intensity.
Traditional backlight module is many with cold-cathode tube (Cold Cathode Fluorescent Lamp; CCFL) as light source, can be divided into side-light type light inlet (edge lighting) and two kinds of straight-down negative light inlets (bottom lighting) according to the difference of light source incoming position, usually apply among various information, communication, the consumer products, an area source of the LCD of the said goods is provided thus.In portable electronic product, because the consideration of weight, the backlight module of side-light type light inlet becomes preferable selection.
The technology that light source is substituted in the backlight module can prolong the serviceable life of LCD Panel.The pattern that light source is substituted can be that the back of the body is taken out, take out at the end and side is taken out, and the light source of product is substituted pattern and adopted the structure of side-extract type to change the sidelight source mostly on the market now.Fig. 1 is the structural map that the backlight module of existing side-extract type light source is shown, and as shown in Figure 1, the side of backlight module 15 has guide groove 22.Light source 25 comprises supporting part 19 and is positioned at its fluorescent tube 14.Light source 25 slips into along the side of guide groove 22 by backlight module.Generally speaking, the backlight module of side-extract type and bottom pumping type needs bigger workbench when changing light source.Therefore in addition, the backlight module of carrying on the back odd test now utilizes a back iron frame to fix the sidelight source, suitable inconvenience when dismounting.For existing back of the body odd test backlight module, need better design and could change light source more quickly and easily.
Summary of the invention
Therefore, the invention provides a kind of backlight module of carrying on the back odd test, this module comprises: framework, optical element, base plate, bracket and light source.Optical element is arranged in the framework, and the interior intermarginal accommodation space that has of the side of at least one side of optical element and framework.Base plate is arranged at the below of this optical element and combines with framework.Base plate can not exclusively cover in framework, after the base plate installing, has a distance between an edge of base plate and the frame sides to expose the part accommodation space at least.Bracket also has setting light source thereon, and bracket is incorporated into the lower edge of framework and base plate and covers accommodation space.Light source holder on the bracket places in the accommodation space and is positioned at the side of optical element.Wherein bracket can break away from framework with the framework combination or along opposite direction along the direction towards the base plate bottom surface.Optical element comprises a light guide plate at least.
In backlight module provided by the present invention, above accommodation space and the top inner edge of the framework of side and the side inner edge can have reflecting coating and the bracket inner edge also has reflector layer, place the light that light source sent in the accommodation space to be imported into light guide plate more efficiently because of the reflection of reflecting coating, the structure of the visual bracket of reflecting coating on the framework and optical efficiency determine whether coating.Optical element also comprises a diffuser plate, and this diffuser plate is positioned on the light guide plate, and a Polarizer is positioned on this diffuser plate.
Base plate is positioned under the light guide plate and from light guide plate and extends to accommodation space, can expose accommodation space or shaded portions accommodation space fully.The shape of bracket can be " L " shape, " ㄈ " font (opening shaped as frame to the right) or " one " font, and bracket is to be mounted on the framework in the mode on straight (" on straight " mode is defined in hereinafter).
Inner edge at bracket also is coated with reflecting coating, and its effect also is to place the light that light source sent in the accommodation space to be inducted into light guide plate more efficiently.Bracket is fixed in mode on framework and the base plate and is included in the bracket lateral margin and is provided with earclip, and described earclip can fasten with the combined hole that is positioned at base plate; In addition, also can use the mode that screws togather or fit to fix bracket.The employed material of bracket can be metal or insulating material, and wherein, insulating material can be tygon, polycarbonate, poly-propionyl acid esters or acrylonitrile-butadiene-styrene copolymer (ABS).When the employed material of bracket is insulating material, can further reduces the leakage current of light source module, and then improve the serviceable life of light source module.
In the present invention, light source can use cold cathode fluorescent lamp or light emitting diode.
Useful technique effect of the present invention is: light sources is substituted easily, and can reduce the leakage current of light source module effectively, the serviceable life of improving light source module thus, and can reduce work hours significantly, reduce manufacturing cost.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, be described in detail as follows below in conjunction with accompanying drawing:
Fig. 1 is the structural map that existing side-extract type light source backlight module is shown.
Fig. 2 is the synoptic diagram that the cut-away section of a preferred embodiment of the present invention is shown.
Fig. 3 to Fig. 4 is the rough schematic view that the cut-away section of other preferred embodiment of the present invention is shown.
Fig. 5 is to be example with the earclip, bracket is shown how is installed in diagrammatic cross-section on the backlight module.
Fig. 6 is the synoptic diagram that the electrooptical device that utilizes above-mentioned display device manufacturing is shown.
Wherein, description of reference numerals is as follows:
10 LCD, 14 fluorescent tubes
15 backlight modules, 19 supporting parts
22 guide grooves, 25 light sources
100,200,300,400,600 frameworks, 102,202 display panels
104,204,304,404 optical element 104a, 204a light guide plate
106,206,306,406,606 base plates, 108,208,308,408,608 brackets
One end, 110,210,310,410,610 light sources of 108a, 108b bracket
112 accommodation spaces, 114 arrows
116a, 116b, 116,216,316a, 316b, 316,416a, 416b, 416 reflecting coatings
500 display device, 502,702 electronic components
50,704 electrooptical devices, 612 reflecting plates
606a, 608a one end 608b earclip
Embodiment
Though the shape of bracket provided by the present invention approximately is divided into " L " shape, " ㄈ " font or " one " font, still have some other changes shape equally can reach effect of the present invention.In order more clearly to annotate technical characterictic of the present invention, below will enumerate a plurality of embodiment to further specify.
See also Fig. 2, Fig. 2 is the synoptic diagram that the cut-away section of a preferred embodiment of the present invention is shown.One LCD 10 comprises framework 100, display panels 102, optical element 104, base plate 106, bracket 108 and light source 110.Framework 100 is the skeletons that support display panels 102, is stained with the drive circuit chip (not shown) on the display panels 102, and this display panels 102 is arranged at the upside of framework 100 and is embedded in the framework; Optical element 104 is arranged at the downside of framework 100, and base plate 106 is arranged at the below of optical element 104, thereby base plate 106 combines with framework 100 optical element 104 is fixedly arranged between the two.
Have an accommodation space 112 between the side inner edge of one side of optical element 104 and framework 100, when base plate 106 combined with framework 100, this accommodation space 112 exposed a part at least, is to expose fully in the present embodiment.Light source 110 is arranged on the inner edge of bracket 108.Bracket 108 can move along the direction of arrow 114 and be incorporated into the lower edge of framework 100 and base plate 106 and cover accommodation space 112.In the present invention, bracket 108 moves along the direction of arrow 114 and is referred to as " on straight "; Otherwise bracket 108 moves along the direction opposite with arrow 114 and is referred to as " down straight ".Optical element 104 comprises a light guide plate 104a, is positioned at the diffuser plate 104b on the light guide plate 104a, and optical element 104 also comprises a Polarizer 104c, and this Polarizer 104c is positioned on the diffuser plate 104b.
In the present embodiment, the top inner edge of framework 100 has reflecting coating 116a, and the inner edge of bracket 108 has reflecting coating 116b, reflecting coating 116a, 116b can will place light that light source 100 sent in the accommodation space 112 because the reflection of reflecting coating 116a, 116b and the more efficient optical element 104 that is directed into.
In addition, in the backlight module as shown in Figure 2, when being installed in the backlight module on bracket 108 is straight, the outside of an end 108a of bracket 108 can be against the inner edge of framework 100 sidewalls; The one end 108b of bracket 108 and the combination of base plate 106 can or screw togather (end illustrates) for bonding (not shown).When thereby bracket 108 directly upward combined with base plate 106 and framework 100, the sidewall of bracket 108 can prop up the sidewall of framework 100 and the bottom surface inner edge of bracket 108 can be fitted with the bottom surface of base plate 106, and in the present embodiment, bracket 108 can screw togather with base plate 106 or be bonding.
Fig. 3 to Fig. 4 is the rough schematic view that the cut-away section of another preferred embodiment of the present invention is shown.In Fig. 3, bracket 308 is " one " font, at this moment, reflecting coating 316a not only is positioned at the upside inner edge of framework 300, also be positioned at the side inner edge of framework 300, then have reflecting coating 316b on bracket 308 and surfaces light source 310 homonymies, reflecting coating 316a and 316b have constituted complete reflecting coating 316.In Fig. 4, bracket 408 is anti-" L " shape, at this moment, reflecting coating 416a is positioned at the upside inner edge of framework 400, on the surface of bracket 408 and light source 410 homonymies and the side inner edge of bracket 408 then all have reflecting coating 416b, reflecting coating 416a and 416b have constituted complete reflecting coating 416.
In backlight module disclosed in this invention, light sources (combination of light source and bracket) can just in the mode on straight, directly be installed in the backlight module along the direction towards the base plate bottom surface.In addition, light sources also can along with light sources installing side in the opposite direction, just, from backlight module, remove in the mode under straight.And can earclip be set at the lateral margin of bracket, earclip can fasten with the combined hole that is positioned at base plate easily, or utilizing to screw togather with bonding mode is fixedly arranged on light sources in the framework.Fig. 5 is to be that example illustrates bracket and how to be installed in diagrammatic cross-section on the backlight module with the earclip.As shown in Figure 5, have at least one opening (not shown) on the framework 600, an end of bracket 608 has an earclip 608b.When the bracket 608 that is loaded with light source 610 was inserted accommodation space (between framework 600 and light guide plate 604) in the mode on straight, an end 608a of bracket 608 was embedded in the space of 612 of an end 606a of base plate 606 and reflecting plates.The end that continuation has bracket 608 earclip 608b pushes away to the direction on straight, and earclip 608b can be slided the opening of inserting on the framework 600.Bracket 608 can be fixed on the framework 600 by an end 608a and earclip 608b.In the time bracket 608 will being thrown off with framework 600, upwards stir earclip 608b make its with framework 600 on the opening disengagement, can easily bracket 608 be separated with framework 600.
Use backlight module provided by the present invention and have considerable advantage, light sources is substituted easily, not only can prolong the serviceable life of the LCD of using backlight module provided by the present invention, and can reduce work hours significantly, reduces manufacturing cost.When bracket uses metal material, can increase the heat sinking function of light sources, when bracket is selected insulating material (this insulating material can be tygon, polycarbonate, poly-propionyl acid esters or acrylonitrile-butadiene-styrene copolymer) for use, then can reduce the leakage current of light sources.Following table is to use first embodiment provided by the present invention and the measured data of existing backlight module respectively, and at this, the bracket among first embodiment adopts poly-propionyl acid esters.
As above shown in the table, in A group, supply frequency is controlled at 55KHz, output current is controlled at 6mA, though resulting brightness is similar, has had the required input current of the backlight module input current height more required than the embodiment of the invention now about 13%.In the B group, supply frequency is controlled at 46KHz, input current is controlled at about 6.4mA, it is about 17% that the measured output current of the existing backlight module of the result input current more measured than embodiments of the invention is low, and the brightness of backlight module of the embodiment of the invention exceeds 25% of existing backlight module brightness especially.These results prove that embodiment provided by the present invention can suppress the leakage current of light sources really.
In the present invention, the spendable material of framework comprises plastics (as: thermosets, thermoplastic or both combinations), metal (as: aluminium, magnesium, copper, iron, tin, zinc or other), metal alloy (as: aluminium, magnesium, copper, iron, tin, zinc, oxide, nitride, oxides of nitrogen or other, or above-mentioned combination or above-mentioned combination).Optical element can also comprise the blooming piece of diffusion sheet, prismatic lens, blast sheet, wavelength selection sheet, light penetrate through reflective sheet or other function, or above-mentioned combination.
In addition, light source of the present invention, comprise fluorescent tube, light emitting diode, field emission light-emitting source (FEL), organic electric-excitation luminescent light source or the like, wherein fluorescent tube can be for example cathode fluorescent tube (CCFL), outer electrode cold-cathode tube (EEFL), thermal cathode fluorescent tube (HCFL), and the shape of fluorescent tube comprises linear, " L " shape, " U " shape, crooked shape or other shape; The organic electric-excitation luminescent light source comprises organic electric-excitation luminescent light source (OELD).
Also have, the display device of backlight module disclosed in this invention can be illustrated by the single display device with display surface, also can be illustrated by the multi-display apparatus with two or more display surfaces.Wherein, display panel is a display panels, comprise for example penetrating type panel, the semi penetration type panel, the reflection-type panel, double-sided display profile plate, vertical orientation profile plate (VA), horizontal switch type panel (IPS), multi-domain perpendicular alignment-type panel (MVA), twisted nematic panel (TN), super-twist nematic panel (STN), pattern vertical orientation profile plate (PVA), super pattern vertical orientation profile plate (S-PVA), the advanced person is profile plate (ASV) with great visual angle, fringe field switch type panel (FFS), continuous fireworks shape arrange type panel (CPA), rotational symmetry is arranged micella panel (ASM), optical compensation curved arrange type panel (OCB), super horizontal switch type panel (S-IPS), advanced super horizontal switch type panel (AS-IPS), extreme edge electric field switch type panel (UFFS), stabilizing polymer alignment-type panel (PSA), double vision angle profile plate (dual-view), the panel of three visual angle profile plates (triple-view) or other type, or the combination of above-mentioned panel.
Also have, as shown in Figure 6, Fig. 6 is the synoptic diagram that the electrooptical device that utilizes above-mentioned display device manufacturing is shown.Thereby the display device 700 that the foregoing description constituted can be combined into an electrooptical device 704 with electronic component 702 connections.Electronic component 702 comprises for example control element, executive component, treatment element, input element, memory element, driving element, protecting component, sensing element, detecing element or other function element, or the combination of said elements.And the type of electrooptical device comprises the panel in portable product (as mobile phone, video camera, camera, notebook computer, game machine, wrist-watch, music player, electronic mail transceiver, map navigator or similar products like), video and audio product (as audio-visual projector or similar products like), screen, TV, billboard, the projector etc.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art are not in breaking away from design of the present invention and scope; can make various changes and variation, so protection scope of the present invention is as the criterion with the scope that accompanying claims define.
Claims (10)
1. backlight module comprises:
One framework;
One optical element, it is arranged in this framework, has an accommodation space between the side inner edge of at least one side of this optical element and this framework;
One base plate, it combines and is arranged at the below of this optical element with this framework;
One bracket, it is incorporated into the lower edge of this framework and this base plate and covers this accommodation space; And
One light source, it is arranged on this bracket and is positioned at this accommodation space;
Wherein this bracket can break away from this framework with this framework combination or along opposite direction along the direction towards this base plate bottom surface.
2. backlight module as claimed in claim 1, wherein the top inner edge of this framework has one first reflecting coating.
3. backlight module as claimed in claim 2, wherein the side inner edge of this framework has one second reflecting coating.
4. backlight module as claimed in claim 1, wherein this optical element comprises a light guide plate, a diffuser plate and a Polarizer, wherein this diffuser plate is positioned on this light guide plate, and this Polarizer is positioned on this diffuser plate.
5. backlight module as claimed in claim 4, wherein this base plate extends also this accommodation space of shaded portions at least from this light guide plate to this accommodation space.
6. as claim 2 or 3 described backlight modules, wherein this bracket inner edge has one the 3rd reflecting coating.
7. backlight module as claimed in claim 6, wherein this bracket is shaped as " L " shape, " ㄈ " font or " one " font.
8. backlight module as claimed in claim 6, wherein the material of this bracket is a metal material.
9. backlight module as claimed in claim 6, wherein the material of this bracket is an insulating material.
10. backlight module as claimed in claim 9, wherein this insulating material is tygon, polycarbonate, poly-propionyl acid esters or acrylonitrile-butadiene-styrene copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101370928A CN100498470C (en) | 2007-07-24 | 2007-07-24 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101370928A CN100498470C (en) | 2007-07-24 | 2007-07-24 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101078838A CN101078838A (en) | 2007-11-28 |
| CN100498470C true CN100498470C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101370928A Active CN100498470C (en) | 2007-07-24 | 2007-07-24 | Backlight module |
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| Country | Link |
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| CN (1) | CN100498470C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338867B (en) * | 2008-09-01 | 2012-09-05 | 友达光电股份有限公司 | Backlight module and LCD device |
| KR101698754B1 (en) * | 2009-10-19 | 2017-01-24 | 삼성디스플레이 주식회사 | Back-light assembly and liquid crystal display device having the same |
| CN102454967A (en) * | 2010-10-20 | 2012-05-16 | 苏州璨宇光学有限公司 | Back light module and heat radiating component |
| CN102799003B (en) * | 2012-08-27 | 2015-11-25 | 深圳市华星光电技术有限公司 | Liquid crystal display |
| JP2017161851A (en) * | 2016-03-11 | 2017-09-14 | 三菱電機株式会社 | Display |
-
2007
- 2007-07-24 CN CNB2007101370928A patent/CN100498470C/en active Active
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| Publication number | Publication date |
|---|---|
| CN101078838A (en) | 2007-11-28 |
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