CN105511160A - Lateral entrance type reflector plate and backlight module containing same - Google Patents
Lateral entrance type reflector plate and backlight module containing same Download PDFInfo
- Publication number
- CN105511160A CN105511160A CN201510983927.6A CN201510983927A CN105511160A CN 105511160 A CN105511160 A CN 105511160A CN 201510983927 A CN201510983927 A CN 201510983927A CN 105511160 A CN105511160 A CN 105511160A
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- CN
- China
- Prior art keywords
- light
- reflector plate
- type reflector
- light guide
- entering type
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
Abstract
The invention relates to the field of liquid crystal display, in particular to a lateral entrance type reflector plate and a backlight module containing the same. The lateral entrance type reflector plate comprises a mixing portion and an installation portion. The mixing portion and the insulation portion are divided by roulettes. Transmitting openings are formed in the mixing portion, the transmitting openings close to the roulettes are corresponding to an LED light source interval positions. The reflector plate of the mixing portion is attached to an upper surface of a light guide panel by folding the roulettes. Most of light ray of heat pot regions close to the LED light source side is reflected back to the light guide panel to continuously generate reflection, refraction and scattering to enable the integral light guide panel to light uniformly through the arrangement of the transmitting openings, the hot spot phenomenon is avoided, the light utilization ratio is improved, and the backlight module and a liquid crystal displayer having good effect, high energy utilization ratio and narrow frames are produced.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of side entering type reflector plate and the backlight module comprising this reflector plate.
Background technology
In general liquid crystal display, liquid crystal panel does not have lighting function, therefore can configure backlight module in the below of liquid crystal panel and provide area source, to reach the function of display.In the light emitting source of backlight module, light emitting diode (LED) is widely used because of advantages such as its luminescence efficiency are high, colour gamut is high.Because LED is pointolite, the lighting angle of its light-emitting area is limited, multiple LED can be arranged in a row in the backlight module of usual liquid crystal display and make LED lamp bar, to provide line source in light guide plate, line source is converted to the area source of liquid crystal panel by recycling light guide plate, with the effect providing liquid crystal display to reach display, namely so-called side entrance back module.In prior art, backlight module comprises light guide plate and light source, wherein, light source is the LED lamp bar being arranged with multiple LED, the light diffusingsurface that light guide plate has incidence surface, the exiting surface adjacent with incidence surface and is oppositely arranged with exiting surface, the light-emitting area of LED, towards the incidence surface of light guide plate, the light diffusingsurface of light guide plate is distributed with scattering netted dot.The incidence surface of the light therethrough light guide plate that LED sends is to be incident in light guide plate, and being incident to light in light guide plate can by the light diffusingsurface scattering relative with exiting surface, and equably by exiting surface outgoing, to provide liquid crystal panel area source.
Because of the optical field distribution of light emitting diode substantially in lambert's body (lambertian), its forward has stronger luminous intensity, and this causes the phenomenon of contiguous LED lamp bar viewing area luminance nonuniformity, and this phenomenon is called focus (hotspot).From LED light-emitting area more away from, it is more even that the light that each pointolite sends mixes, but along with people are for the demand of the narrow frame of liquid crystal display, the requirement of frame size limits the spacing of the edge, viewing area of liquid crystal panel and the light-emitting area of LED, and this makes hot issue very serious.
At present, the method eliminating LED side entrance back module focus mainly adopts the coupling distance increasing LED arrangement density or increase between LED and light guide plate, or increases V-CUT structure in the LED light source incident side of light guide plate.In above-mentioned prior art, increase LED arrangement density and can increase cost; The spacing increasing LED and light guide plate incident side can increase the frame of backlight module and display, destroys attractive in appearance, and reduces coupling efficiency, reduces light efficiency; Increase V-CUT structure, light guide plate can be made to produce and become difficulty, and unfavorable production assembling.
Summary of the invention
The object of this invention is to provide a kind of side entering type reflector plate and the backlight module comprising this reflector plate, effectively can solve hot issue, improve light utilization simultaneously.
The invention provides a kind of base case: a kind of side entering type reflector plate, comprises mixing unit and installation portion, and mixing unit and installation portion are separated by roulette, and mixing unit offers light openings, the light openings near roulette is corresponding with LED light source interval location.
Principle of work and beneficial effect are: the light that LED light source sends, and the front side wall first through light guide plate carries out first time refraction.On the upside of directive light guide plate, a large amount of light of hot spot region are because the reflex of reflector plate, and most of light reflection returns light guide plate, and small part light, by refraction, penetrates reflector plate.Wherein be reflected back the light of light guide plate, change light path, directive is away from the reflector plate position of hot spot region, and some light penetrates from light openings.Some light continues to be reflected to farther position, makes light carry out Homogeneous phase mixing.After folding by roulette, the reflector plate of mixing unit is attached to light guide plate upper surface, arranged by light openings, make the light major part near the hot spot region of LED light source be reflected back light guide plate to continue to reflect, reflect and scattering, make the overall uniform in light emission of light guide plate, solve light guide plate hot spot phenomenon, improve light utilization.
The present invention, by the light openings of the mixing unit of reflector plate, may be used for the luminous flux controlling light.Because hot spot region is near LED light source part, light openings near roulette is corresponding with LED light source interval location, make hot spot region light reflection return light guide plate, continue produce reflection and refraction, make the uniform light of hot spot region be distributed in whole light guide plate region.The reflection ray mixing of the light penetrated by light openings and reflector plate makes the brightness uniformity of mixing unit, change light path, the uniform light that hot spot region is concentrated is mixed into whole module region, thus improve and even eliminate the generation of HotSpot (focus), and improve light utilization.Meanwhile, mixing unit is fixed on the upper surface of light guide plate, installation portion is fixed on the sidewall of light guide plate, produces assembling simply, is convenient to dismounting and changes.
Further prioritization scheme one for base case: light openings is transversely arranged, the area of light openings is large from little change successively with roulette.Due to the optical field distribution that LED light source is lambert's body, the part near LED light source has stronger luminous intensity, and the part luminous intensity away from LED light source is less.In order to make its luminous intensity and brightness ratio comparatively even, can the area of light openings large from little change successively with roulette, the light intensity near roulette is larger, so light openings Area comparison is little, the intensity of bright dipping so herein can reduce; Light intensity away from roulette is smaller, so light openings Area comparison is large, increase luminous flux, thus the light intensity that goes out herein uprises.Thus, can make the light intensity of whole light guide plate outgoing and brightness ratio more even.
Further prioritization scheme two for preferred version one: light openings is rhombus or regular polygon or circle.Because light openings is for controlling the luminous flux of light, light openings can be arranged to various shape.
Further prioritization scheme three for base case: installation portion is provided with permanent opening and the fool proof chamfering for the production of assembling.Wherein permanent opening mainly plays assembling effect, and LED lamp bar and heat sink, by permanent opening, make mixing unit and installation portion form an entirety.Because reflector plate has pros and cons to distinguish, but pros and cons is not easy again to distinguish, when reflector plate has fool proof chamfering, line workers remembers chamfering position, can be convenient to line workers's quick perception reflex sheet pros and cons, quick assembling, enhance productivity, avoid reflector plate pros and cons wrongly installed.
Further prioritization scheme four for base case: the both sides of mixing unit are provided with hangers, is provided with the mylar film removably connected above hangers.When producing assembling, be assembled with light guide plate, after the good glue frame of backboard surrounding card, location hangers is stuck on glue frame relevant position.Because the mixing unit of reflector plate is near LED lamp bar, LED lamp bar can produce a large amount of heat time luminous, reflector plate base material is PET, and thickness is generally 1.88mm, very thin, therefore the mixing unit of reflector plate is when being heated, contraction can be produced heave, the optics taste defect of water ripples shape can be produced with that, therefore need to arrange hangers, the pulling force produced by hangers location balances pyrocondensation power, thus avoids the optics taste defect producing water ripples shape.Simultaneously, because hangers region is not at the actual viewing areas of backlight module, can be pushed down by glue frame, but have guide-lighting effect because of blooming piece, and because of the profile of hangers, have generation open-celled structure, will light leak be produced, produce linear light leak at glue edge edge, be called in the industry location structure light leak, by the extinction characteristic of mylar film, absorb this part light, avoid producing location light leak.
Base case two, a kind of backlight module comprising reflector plate, comprises backboard, light guide plate, lamp bar and blooming piece.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is side entering type reflector plate structure schematic diagram of the present invention;
Fig. 2 is the structural representation of backlight module of the present invention;
Fig. 3 is the structural representation of mylar film of the present invention;
Fig. 4 is assembly structure schematic diagram of the present invention;
Fig. 5 is Optics trace schematic diagram of the present invention.
Mark in above-mentioned figure is: mixing unit 1, light openings 101, hangers 102, mylar film 103, installation portion 2, permanent opening 201, fool proof chamfering 202, roulette 3, side entering type reflector plate 4, backboard 5, heat sink 6, light guide plate 7, blooming piece 8, glue frame 9, pcb board 10, LED lamp bead 11.
Embodiment
As shown in Figure 1, a kind of side entering type reflector plate, comprise mixing unit 1 and installation portion 2, mixing unit 1 and installation portion 2 are by roulette 3 separately, mixing unit 1 offers light openings 101, and light openings 101 is rhombus, and the light openings 101 near roulette 3 is corresponding with LED light source interval location, transversely arranged between light openings 101, the area of light openings 101 is large from little change successively with roulette 3.The both sides of mixing unit 1 are provided with hangers 102, and hangers 102 is provided with the mylar film 103 removably connected above.Installation portion 2 is provided with permanent opening 201 and the fool proof chamfering 202 for the production of assembling.As shown in Figure 2, backlight module comprises side entering type reflector plate 4, backboard 5, heat sink 6, light guide plate 7, blooming piece 8, glue frame 9, lamp bar, pcb board 10 and LED lamp bead 11.When producing assembling, first use that heat-conducting glue is bonding, pcb board 10 inside the cant board of heat sink 6, then is fixed heat sink 6 on backboard 5, then loaded onto by side entering type reflector plate 4.Lamp bar and heat sink 6 are inserted in by the permanent opening 201 of side entering type reflector plate 4, again light guide plate 7 is loaded in backboard 5, again glue frame 9 is stuck in backboard 5 surrounding, by side entering type reflector plate 4 folding and forming, light guide plate 7 upper surface has a small stair structure, for placing the side entering type reflector plate 4 of mixing unit 1, bench height and side entering type reflector plate 4 consistency of thickness.Be stuck on glue frame 9 relevant position by the hangers 102 of side entering type reflector plate 4, then loaded by blooming piece 8, and stick the mylar film 103 of light leakage at hangers 102 place, mylar film 103 structure as shown in Figure 3.
Wherein roulette 3 is two, when producing assembling, by same direction folding and forming, article two, the side entering type reflector plate 4 between roulette 3 is attached to the outside of edge-on heat sink 6, lamp bar passes through high-temperature heat-conductive glue closely in the inner side of edge-on heat sink 6, folded by two roulettes 3, complete side entering type reflector plate 4 and turn to, make the mixing unit 1 of side entering type reflector plate 4 be attached to light guide plate 7 upper surface.
The width of permanent opening 201 is the thickness sum of lamp bar 12 thickness and edge-on heat sink 6, when producing assembling, first lamp bar is fixed on heat sink 6 by heat-conducting glue, fix heat sink 6 again on backboard 5, again lamp bar and the edge-on part of heat sink 6 were overlapped permanent opening 201, at the installation portion 2 of side entering type reflector plate 4 of having good positioning.
Light openings 101, is divided into A, B, C tri-array portions, and wherein light openings 101 position of A array and LED lamp bead 11 stagger, and LED lamp bead 11 interval is corresponding; Light openings 101 area of the light openings 101 area ratio A array of B array is large, and B array number ratio A array quantity is few; Light openings 101 area of the light openings 101 area ratio B array of C array is large, and array number ratio B array quantity is few.After folding, the light openings 101 of A array is near lamp bar, and the light openings 101 of C array is farthest away from lamp bar.
The hangers 102 of location has two at least, and when producing assembling, be assembled with light guide plate 7, after the good glue frame 9 of backboard 5 surrounding card, the hangers 102 of location is stuck on glue frame 9 relevant position.
Fool proof chamfering 202, is placed in regulation corner, can be placed in the upper right corner or the lower right corner, and can be convenient to the pros and cons that line workers identifies side entering type reflector plate 4 fast, quick assembling, enhances productivity, and avoids side entering type reflector plate 4 pros and cons wrongly installed.
As shown in Figure 4, be the structural drawing assembled, comprise glue frame 9, blooming piece 8, side entering type reflector plate 4 and hangers 102.
For solving side entrance back module hot issue, now set forth the optical principle of the embodiment of the present invention.As shown in Figure 5, the light that the LED lamp bead 11 on lamp bar sends, first reflects through the first time of light guide plate 7, a large amount of light of directive hot spot region, because of the reflex of side entering type reflector plate 4, most of optical reflection returns light guide plate 7, small part optics, by refraction, penetrates side entering type reflector plate 4.Be reflected back the light of light guide plate 7, run into site part, scattering occurs, does not run into site part, refraction and reflection occur.Do not run into site refraction to the light of light guide plate 7 lower surface, because the effect of side entering type reflector plate 4, be reflected back light guide plate 7, continue to reflect, the optical effects such as reflection and scattering, until the overall even light mixing of light guide plate 7.The light source penetrated from the light openings 101 of array B has the light reflecting direct directive array B through light guide plate 7 for the first time, and have the light through the reflection of light guide plate 7 lower surface and scattering, the light penetrated from the light openings 101 of array C is in like manner like this.Because hot spot region light is concentrated, energy is large, therefore aperture array A, and area is less, and along with away from lamp bar, aperture array aperture area increases gradually.
Above-described is only the preferred embodiment of the present invention, should be understood that for a person skilled in the art, under the prerequisite not departing from structure of the present invention, can also make some distortion and improvement, these all can not affect effect of the invention process and practical applicability.
Claims (6)
1. a side entering type reflector plate, is characterized in that, comprises mixing unit and installation portion, and mixing unit and installation portion are separated by roulette, and mixing unit offers light openings, and the light openings near roulette is corresponding with LED light source interval location.
2. side entering type reflector plate according to claim 1, is characterized in that: described light openings is transversely arranged, and the area of light openings is large from little change successively with roulette.
3. side entering type reflector plate according to claim 2, is characterized in that: described light openings is rhombus or regular polygon or circle.
4. side entering type reflector plate according to claim 1, is characterized in that: described installation portion is provided with permanent opening and the fool proof chamfering for the production of assembling.
5. side entering type reflector plate according to claim 1, is characterized in that: the both sides of described mixing unit are provided with hangers, is provided with the mylar film removably connected above hangers.
6. comprise a backlight module for reflector plate according to claim 1, it is characterized in that, comprise backboard, light guide plate, lamp bar and blooming piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510983927.6A CN105511160A (en) | 2015-12-24 | 2015-12-24 | Lateral entrance type reflector plate and backlight module containing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510983927.6A CN105511160A (en) | 2015-12-24 | 2015-12-24 | Lateral entrance type reflector plate and backlight module containing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105511160A true CN105511160A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510983927.6A Pending CN105511160A (en) | 2015-12-24 | 2015-12-24 | Lateral entrance type reflector plate and backlight module containing same |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120050635A1 (en) * | 2010-08-25 | 2012-03-01 | Samsung Electronics Co., Ltd. | Liquid crystal display device |
| CN202629814U (en) * | 2012-05-31 | 2012-12-26 | 京东方科技集团股份有限公司 | Lateral backlight module |
| KR20130026893A (en) * | 2011-09-06 | 2013-03-14 | 엘지디스플레이 주식회사 | Led pakage and backlight unit inculding the same |
| CN103032766A (en) * | 2012-12-12 | 2013-04-10 | 京东方科技集团股份有限公司 | Backlight module and display device |
| KR101396772B1 (en) * | 2012-12-14 | 2014-05-20 | 엘지디스플레이 주식회사 | Back light unit and display device comprising the same |
| CN104791668A (en) * | 2015-04-30 | 2015-07-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal displayer comprising the same |
-
2015
- 2015-12-24 CN CN201510983927.6A patent/CN105511160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120050635A1 (en) * | 2010-08-25 | 2012-03-01 | Samsung Electronics Co., Ltd. | Liquid crystal display device |
| KR20130026893A (en) * | 2011-09-06 | 2013-03-14 | 엘지디스플레이 주식회사 | Led pakage and backlight unit inculding the same |
| CN202629814U (en) * | 2012-05-31 | 2012-12-26 | 京东方科技集团股份有限公司 | Lateral backlight module |
| CN103032766A (en) * | 2012-12-12 | 2013-04-10 | 京东方科技集团股份有限公司 | Backlight module and display device |
| KR101396772B1 (en) * | 2012-12-14 | 2014-05-20 | 엘지디스플레이 주식회사 | Back light unit and display device comprising the same |
| CN104791668A (en) * | 2015-04-30 | 2015-07-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal displayer comprising the same |
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Application publication date: 20160420 |
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| RJ01 | Rejection of invention patent application after publication |