The content of the invention
The main object of the present invention is to propose a kind of backlight module for display, it is intended to improve the thermally relieved of quantum dotProperty and reduce quantum dot usage amount.
To achieve the above object, a kind of backlight module for display device proposed by the present invention, including：LED backlight,With blue chip, also with red light chips or green glow chip；Light guide plate, including enter photosphere, go out photosphere and reflecting layer, it is described go outPhotosphere and the reflecting layer are oppositely arranged, it is described enter optical layer connection described in go out photosphere and the reflecting layer；Set on the reflecting layerHave quantum dot site, the quantum dot that the quantum dot site is included corresponds to green quantum dot or red quantum dot, with it is describedLED backlight, which coordinates, produces white light；The LED backlight enters photosphere side described in being located at.
Preferably, quantum dot site projection or recessed in the reflecting layer.
Preferably, the quantum dot site is located at the reflecting layer by printing/laser/hot pressing/ink-jetting style.
Preferably, the diameter range of the quantum dot is 1 nanometer~20 nanometers.
Preferably, the diameter range of the quantum dot is 2 nanometers~10 nanometers.
Preferably, away from it is described enter photosphere direction on, all quantum dots on the reflecting layer in unit areaArea accounting gradually increases.
Preferably, the quantum dot site is equidistantly arranged on the reflecting layer, on the direction for entering photosphere away from described in,The area of single quantum dot site gradually increases.
Preferably, quantum dot site equal diameter differs in size spacing arrangement, away from it is described enter photosphere direction on,Spacing between quantum dot site described in adjacent two is gradually reduced.
Preferably, the backlight module for display device also includes reflector plate and radiating subassembly, the reflecting layer patchTogether in the reflector plate side, the radiating subassembly laminating and the opposite side of reflector plate.
The present invention also proposes a kind of display device, and the display device includes backlight module, and the backlight module includes：LED is carried on the backLight source, with blue chip, also with red light chips or green glow chip；Light guide plate, including enter photosphere, go out photosphere and reflecting layer,It is described go out photosphere and the reflecting layer be oppositely arranged, it is described enter optical layer connection described in go out photosphere and the reflecting layer；The reflectionLayer is provided with some quantum dots set in net-point shape, and the quantum dot corresponds to green quantum dot or red quantum dot, withThe LED backlight, which coordinates, produces white light；The LED backlight enters photosphere side described in being located at.
Technical solution of the present invention by set on the reflecting layer of light guide plate it is some in net-point shape set quantum dots, andThe chip of two kinds of colors is set in LED backlight, LED backlight the side that light guide plate enters photosphere is arranged on, by so settingThe distance for having zoomed out LED backlight and quantum dot is put, and makes quantum dot is flat to avoid quantum dot from being gathered in one on light guide plateBlock, so it is avoided that the heat on quantum dot is too concentrated and is unfavorable for its heat endurance.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, completeSite preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.BaseEmbodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all itsHis embodiment, belongs to the scope of protection of the invention.
If it is to be appreciated that related in the embodiment of the present invention directionality indicate (such as up, down, left, right, before and after ...),Then directionality indicate to be only used for explain relative position relation under a certain particular pose (as shown in drawings) between each part,Motion conditions etc., if the particular pose changes, directionality indicates also correspondingly therewith to change.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, being somebody's turn to do " first ", " second " etc.Description be only used for describing purpose, and it is not intended that indicating or implying its relative importance or implicit indicate indicated skillThe quantity of art feature.Thus, " first " is defined, at least one spy can be expressed or be implicitly included to the feature of " second "Levy.In addition, the technical scheme between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energyBased on enough realizations, when the combination appearance of technical scheme is conflicting or can not realize it will be understood that the knot of this technical schemeConjunction is not present, also not within the protection domain of application claims.
As shown in Figure 1, Figure 2, Figure 4 shows, the present invention proposes a kind of backlight module for display device, including：LED backlight40, with one kind in blue chip 41, and red light chips 43 or green glow chip；Light guide plate 32, including enter photosphere, go out photosphereAnd reflecting layer, go out photosphere and reflecting layer is oppositely arranged, enter optical layer connection and go out photosphere and reflecting layer；As shown in figure 3, being set on reflecting layerThere is quantum dot site 321, the quantum dot that quantum dot site 321 is included is green quantum dot or red quantum dot, to be carried on the back with LEDLight source 40, which coordinates, produces white light；LED backlight 40 is located at into photosphere side, and the light of LED backlight 40 enters guide-lighting from photosphere is enteredPlate 32.
Specifically, as shown in Fig. 2 the backlight module also includes blooming piece 31, reflector plate 33, pcb board 50, radiating subassembly60th, glue frame 70, front frame 10, glass plate 20 and backboard 90, wherein, blooming piece 31 is located at the top of light guide plate 32 and interval settingAt the upper surface of adjacent optical diaphragm 31 it is photosphere on light guide plate 32；Reflector plate 33 is located at the lower section of light guide plate 32 and abutted againstSet, be reflecting layer at the lower surface being in contact on light guide plate 32 with reflector plate 33；Be at the left surface of light guide plate 32 into photosphere,It is alternatively at the right flank of certain light guide plate 32 and up and down at two sides into photosphere；LED backlight 40 is disposed on into photosphereLeft side, and LED backlight 40 is fixed on pcb board 50, and pcb board 50 is in contact with radiating subassembly 60.Light guide plate 32, LEDBacklight 40, pcb board 50 and radiating subassembly 60 are installed in glue frame 70.Also set in going out between photosphere for glue frame 70 and light guide plate 32There is adhesive tape 80, to prevent the light that LED backlight 40 is sent from being leaked from the gap entered between photosphere and glue frame 70 on light guide plate 32Go out.Glass plate 20 is located at the top of blooming piece 31, and glass plate 20 and blooming piece 31 are mounted in glue frame 70, and the pressure of front frame 10 is setIn on glass plate 20.
Illustrated below so that LED backlight 40 includes blue chip 41 and red light chips 43 as an example.By by blue light corePiece 41 and red light chips 43 are mutually encapsulated into LED backlight 40 by glue-line 42, and such LED backlight 40 is with regard to that can send bluenessWith red mixed light.By setting the luminescence chip of two different colours in a LED backlight 40, in identical luminous intensityLess LED backlight 40 can be used down, relative can reduce the quantity of LED backlight 40, and the light mixing sentEvenly, more preferable display effect is obtained.Arranged the quantum dot net to be formed, that LED because incident layer is provided with green quantum dotBacklight 40 sends mixed light and entered by entering photosphere after light guide plate 32, and mixed light excitation quantum point net sends green light, greenLight and blue light and red light formation white light admixed together, are projected from photosphere is gone out.By by quantum dot site 321 set withOn the reflecting layer of light guide plate 32, LED backlight 40 is arranged on the left side for entering photosphere in light guide plate 32, both avoids LED backlightInfluence of 40 heats sent to quantum dot in quantum dot site 321, disperses further through by the quantum dot in quantum dot site 321Flat be located at avoids the quantum dot in quantum dot site 321 from excessively concentrating causing heat to assemble on reflecting layer, it is possible to prevente effectively from amountThe heat assembled at quantum dot in son point site 321 is excessive, improves the thermal reliability of quantum dot.
Further, the projection of quantum dot site 321 or recessed in reflecting layer.Quantum dot site 321 can be projection anti-Penetrate on layer or on recessed and reflecting layer, or in projection simultaneously and recessed and reflecting layer.Projection quantum dot site321 or recessed quantum dot sites 321, both mode relative maturities, it is easier to which quantum dot site 321 is set on reflecting layer.
Preferably, quantum dot site 321 is located on reflecting layer by printing/laser/hot pressing/ink-jetting style.CertainlyQuantum dot site 321 can also be arranged on reflecting layer by other techniques.The characteristics of every kind of technique has different, such as printsTechnological operation is simple, and laser technique is more accurate, and heat pressing process is more stablized, and ink-jetting process relative cost more tests easy behaviourMake, selected accordingly according to the characteristics of each technique during specific making.
The lateral size of dots scope that 321 kinds of quantum dot site is contained is 1 nanometer~20 nanometers.Also, quantum dot site 321The diameter range for planting quantum dot is preferable in 2 nanometers~10 nanometers.When lateral size of dots 2 nanometers~6 is received in quantum dot site 321Rice, excites and produces the high green glow of excitation；When 7 nanometers~10 nanometers of lateral size of dots in quantum dot site 321, light source activation productionThe good feux rouges of purity of adding lustre to.
On away from the direction for entering photosphere, the area accounting of all quantum dot sites 321 on reflecting layer in unit area byIt is cumulative big.LED backlight 40 can operationally produce substantial amounts of heat, and the quantum dot site 321 on reflecting surface is by LED backlightIt is that can also give out substantial amounts of heat that the light that source 40 is sent, which is excited,.And obviously, quantum dot site 321 is accounted in unit area inner areaThan bigger, all quantum dot sites 321 will distribute more heats in this region.On away from the direction for entering photosphere,By making all area accountings of quantum dot site 321 in unit area increasingly come greatly, it is meant that away from the side for entering photosphereUpwards, the heat that the quantum dot in quantum dot site 321 is distributed gradually increases, it is noted that do not imply that quantum hereThe heat that single quantum dot is distributed in point site 321 is in increase tendency, and refers to all quantum dot sites 321 in a regionThe total amount of heat distributed containing quantum dot.So it is avoided that in the quantum dot site 321 in region near from LED/light source on reflecting layerQuantum dot distribute excessive heat, and the heat of LED backlight 40 is superimposed causes local temperature too high, is unfavorable for quantum dotNormal work.By in this way, avoid the heat at reflecting layer relatively uniform, being prevented effectively from local temperature too high.Wherein,It should be appreciated that when the left and right sides of light guide plate 32 is provided with LED backlight 40, that list in the middle of light guide plate 32The area ratio of quantum dot site 321 is relatively bigger in the region of position, and the content of its quantum dot is than also relatively large.
In one embodiment, quantum dot site 321 is equidistantly arranged on reflecting layer, on away from the direction for entering photosphere, amountThe area accounting of son point site 321 gradually increases.The distance between center of quantum dot site 321 is equal arrangement on reflecting layer,The diameter of quantum dot site 321 gradually increases on away from the direction for entering photosphere, and the area of quantum dot site 321 is big, itsThe heat distributed is relatively more, so according to above-mentioned setting, it is relatively close enter photosphere region on quantum dot site 321 inThe heat that quantum dot is produced is less than the heat that quantum dot is produced in the quantum dot site 321 on the region for being relatively distant from photosphereAmount, so it is avoided that the heat of quantum dot and the heat of LED backlight 40 are folded in the quantum dot site 321 for entering photosphere regionPlus after cause close to enter photosphere region heat it is larger, cause reflecting layer hot-spot.The equidistant arrangement amount of making in quantum dot site 321Son point more easily can be fixed on reflecting layer.
Certainly, in another embodiment, it can also be：The area equation of quantum dot site 321, away from the side for entering photosphereUpwards, the spacing between the adjacent center of two quantum dot site 321 is gradually reduced.Above-mentioned setting is proximate to the region into photosphereQuantum dot site 321 is relatively sparse, relatively intensive away from the quantum dot site 321 on the region for entering photosphere, equally plays and avoidsReflecting layer hot-spot.Identical quantum dot site 321 is installed on light guide plate 32, red or green monochromatic quantum is includedPoint, can avoid going wrong in the installing engineering of quantum dot site 321.
As shown in Fig. 2 backlight module also includes reflector plate 33 and radiating subassembly 60, reflecting layer fits in reflector plate 33 1Side, the laminating of radiating subassembly 60 and the opposite side of reflector plate 33.In the present embodiment, the upper epidermis laminating light guide plate 32 of reflector plate 33Reflecting layer, reflector plate 33 layer laminating radiating subassembly 60, such reflector plate 33 can be by the heat transfer at emitting layerTo radiating subassembly 60, beneficial to the radiating of quantum dot 321.
The present invention also proposes a kind of display device, and the display device includes backlight module, the concrete structure of the backlight moduleWith reference to above-described embodiment, because this display device employs whole technical schemes of above-mentioned all embodiments, therefore at least haveAll beneficial effects that the technical scheme of above-described embodiment is brought, this is no longer going to repeat them.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at thisUnder the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectlyIt is included in other related technical fields in the scope of patent protection of the present invention.