CN103062668B - Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip - Google Patents
Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip Download PDFInfo
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- CN103062668B CN103062668B CN201310023660.7A CN201310023660A CN103062668B CN 103062668 B CN103062668 B CN 103062668B CN 201310023660 A CN201310023660 A CN 201310023660A CN 103062668 B CN103062668 B CN 103062668B
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Abstract
The invention discloses a backlight unit lamp strip and a method for arranging light-emitting diodes on the basis of the backlight unit lamp strip. The backlight unit lamp strip comprises a printed circuit board and at least two different types of light-emitting diodes. The different types of light-emitting diodes have different luminous fluxes and power. The different types of light-emitting diodes are alternately arranged on the printed circuit board, and the sum of the luminous fluxes and the sum of the power of the different types of light-emitting diodes are respectively equal to the total required luminous flux and the total required power. The backlight unit lamp strip and the method have the advantages that the requirement on temperature rise can be met while the brightness is guaranteed, and accordingly a display effect of an LCD (liquid crystal display) can be improved.
Description
Technical field
The present invention relates to backlight module (BLU, Back Light Unit) technology, particularly relate to a kind of backlight module lamp bar and the LED arrangement method based on backlight module lamp bar.
Background technology
Liquid crystal display (LCD, Liquid Crystal Display) originally as the display element of non-luminescent, needs to arrange light emitting source on the lcd panel, just can reach effect that is luminous and display.In prior art, BLU lamp bar is the optical module providing back side light source to LCD.Usually, BLU receives light emitting diode (LED, Light Emitting Diode), cold-cathode fluorescence lamp (CCFL, Cold Cathode Fluorescent Lamp) or EL part (EL, Electro Luminescence) three kinds of light sources that mode provides, light is reflected and optically focused, forms light emitting source.
In side-light backlight module lamp bar, by LED permutation and combination is become linear light sources, can effectively improve light inlet efficiency.
Fig. 1 is the structural representation of existing backlight module lamp bar.See Fig. 1, this backlight module lamp bar comprises: LED101 and printed circuit board (PCB) (PCB, Printed Circuit Board) 102, wherein, LED101 evenly encapsulates, be arranged on PCB102, and the power of each LED101 is identical, and PCB shape is cuboid body, offer uniform hole slot 103, for accommodating LED101.That is, the LED of PCB upper employing equal-wattage encapsulation, PCB adopts uniform width, and LED arranges at backlight module lamp bar surface uniform.
In practical application, LED101 can be divided into middle power LED and great power LED.Wherein, the power of middle power LED can be 0.4W and 0.6W, and the power of great power LED can be 0.8W and 1W.
Existing backlight module lamp bar, due to the restriction of lamp bar length, in use there are the following problems:
If in backlight module lamp bar, then can there is total light flux inadequate, because brightness is relevant to the size of luminous flux, cause backlight illumination on the low side in power LED during LED all adopts, and do not meet design brightness demand, make LCD brightness inadequate, display effect is poor;
If in backlight module lamp bar, LED all adopts high-capacity LED, although total light flux can be made to meet brightness requirement, thus make backlight illumination meet design brightness demand, but because LED power is excessive, the heat-sinking capability of backlight module lamp bar is not enough, makes temperature raise, will shorten the service life of backlight module lamp bar, and temperature rise does not meet design requirement.And, if when all adopting high-capacity LED light emitting diode, backlight module lamp bar temperature is too high, and LED deflection efficiency can be caused to reduce, and produces black field speck.
From above-mentioned, existing backlight module lamp bar, structure is comparatively simple, by the mode of the LED of evenly distributed equal-wattage and luminous flux, more difficultly while meeting backlight illumination requirement, meets designed temperature increase requirement.
Summary of the invention
Embodiments of the invention provide a kind of backlight module lamp bar, improve the display effect of LCD.
Embodiments of the invention also provide a kind of light-emitting diode arrangement method based on backlight module lamp bar, improve the display effect of LCD.
For achieving the above object, the embodiment of the present invention provides a kind of backlight module lamp bar, and this backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and described different types of light emitting diode has different luminous fluxes and power, wherein
Described at least two kinds of different types of light emitting diodes are arranged alternately on the printed circuit board,
The summation of the luminous flux of described at least two kinds of different types of light emitting diodes and the summation of power equal total light flux and the general power of designing requirement respectively.
Preferably, described at least two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode; Described printed circuit board (PCB) offers the up and down penetrating open slot corresponding with the second light emitting diode, the center of open slot and the second light emitting diode be centrally located at the same face.
Preferably, the first light emitting diode and the second light emitting diode evenly encapsulate respectively, are contained in the printed circuit board (PCB) of horizontal positioned.
Preferably, described backlight module lamp bar comprises further: arrange jump ring at the first light emitting diode and the second light emitting diode both sides, establishes the bayonet socket for fixing described jump ring in the printed circuit board (PCB) both sides of accommodating first light emitting diode and the second light emitting diode.
Preferably, the quantity of the first light emitting diode or the second light emitting diode is one or more.
Preferably, in described smooth module lamp bar, each first light emitting diode sequentially intersects with each second light emitting diode, cross arrangement on a printed circuit; Or multiple first light emitting diode sequentially intersects with second light emitting diode, cross arrangement on a printed circuit; Or first light emitting diode sequentially intersects with multiple second light emitting diode, cross arrangement on a printed circuit; Or multiple first light emitting diode sequentially intersects with multiple second light emitting diode, cross arrangement on a printed circuit.
For reaching another above-mentioned object, the embodiment of the present invention also provides a kind of light-emitting diode arrangement method based on backlight module lamp bar, and described backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and the method comprises:
Based on the total light flux needed for described backlight module lamp bar and general power, select different luminous flux and at least two kinds of variety classes light emitting diodes corresponding to power, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and power summation equal required total light flux and general power respectively;
Described at least two kinds of different types of light emitting diodes are arranged alternately on a printed circuit.
Preferably, in described light-emitting diode arrangement method, described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode; First light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned; Second light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned.
Preferably, in described light-emitting diode arrangement method, the luminous flux of described first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode; Offer the up and down penetrating open slot corresponding with the second light emitting diode on the printed circuit board, the center of open slot and the second light emitting diode be centrally located at the same face.
Preferably, described light-emitting diode arrangement method comprises further:
In advance jump ring is set at the first light emitting diode and the second light emitting diode both sides, establishes the bayonet socket for fixing described jump ring in the printed circuit board (PCB) both sides of accommodating first light emitting diode and the second light emitting diode.
Preferably, in described light-emitting diode arrangement method, the mode of described cross arrangement comprises: each first light emitting diode and each second light emitting diode sequentially intersect, multiple first light emitting diode sequentially intersects with second light emitting diode, first light emitting diode sequentially intersects with multiple second light emitting diode and multiple first light emitting diode sequentially intersects with multiple second light emitting diode.
Preferably, in described light-emitting diode arrangement method, the length of described open slot and width are determined according to the power of the spacing between the first light emitting diode and the second light emitting diode, the first light emitting diode and the power of the second light emitting diode.
As seen from the above technical solution, in a kind of backlight module lamp bar that the embodiment of the present invention provides and the light-emitting diode arrangement method based on backlight module lamp bar, backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, wherein, described at least two kinds of different types of light emitting diodes have different luminous fluxes and power, and described at least two kinds of different types of light emitting diodes are arranged alternately on the printed circuit board.Like this, by the LED of different luminous flux and power is carried out cross arrangement on PCB, make the luminous flux sum of each LED and power sum meet respectively LCD show needed for total light flux and general power.Due in an lcd, the total light flux of backlight module lamp bar and the brightness of LCD are direct ratio linear relationships, and the general power of backlight module lamp bar becomes to be similar to proportional relation with temperature rise, therefore, the present invention is by being arranged alternately on the printed circuit board by least two kinds of different types of light emitting diodes, and make the luminous flux sum of all light emitting diodes and power sum meet respectively LCD show needed for total light flux and general power, temperature increase requirement can be met while guarantee LCD brightness requirement, improve the display effect of LCD.
The backlight module lamp bar utilizing the embodiment of the present invention to provide and the light-emitting diode arrangement method based on backlight module lamp bar, can obtain following technique effect:
1, the present invention adopts the combination of the LED light emitting diode of different capacity, can provide the design of multiple backlight module lamp bar, can design the distinctiveness product of different brightness and temperature rise demand;
2, the present invention adopts the combination of the LED light emitting diode of different capacity, solve backlight module lamp bar of the prior art all adopt in power LED light emitting diode time, the problem that brightness does not meet design requirement, improve display brightness, optimize display effect;
3, the present invention adopts the combination of the LED light emitting diode of different capacity, solve backlight module lamp bar of the prior art when all adopting high-capacity LED light emitting diode, the too high problem not meeting design requirement and reduce lamp bar temperature, extend LED lamp bar service life of temperature rise;
4, the present invention adopts the combination of the LED light emitting diode of different capacity, and solve backlight module lamp bar of the prior art when all adopting high-capacity LED light emitting diode, temperature is too high, and LED deflection efficiency can be brought to reduce, and produces the problems such as black field speck.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in below describing is only some embodiments of the present invention, for those of ordinary skills, can also obtain other embodiment and accompanying drawing thereof according to these accompanying drawing illustrated embodiments.
Fig. 1 is the structural representation of existing backlight module lamp bar.
Fig. 2 is the structural representation of embodiment of the present invention backlight module lamp bar.
Fig. 3 is another structural representation of embodiment of the present invention backlight module lamp bar.
Fig. 4 is the light-emitting diode arrangement method flow schematic diagram of the embodiment of the present invention based on backlight module lamp bar.
Detailed description of the invention
Carry out clear, complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
Existing backlight module lamp bar, the upper evenly distributed LED of PCB, more difficult reaching between total light flux and temperature rise preferably balances, and LCD is shown brighter or comparatively dark, display effect is poor, and the comfortableness affecting user is experienced.
In the embodiment of the present invention, consider to adopt the mode of combined crosswise, the LED of different capacity is carried out cross arrangement on PCB, while the power sum of LED meets total power requirements, make total light flux meet luminous flux threshold value needed for LCD display.Meanwhile, in order to improve the heat dispersion at great power LED place, by arranging the PCB of different in width aluminium base for the LED of different capacity, the radiating surface at great power LED place is made to be greater than the radiating surface at low-power LED place.Like this, when realizing temperature rise and satisfying the demands, farthest improve total light flux value, reach and meet temperature increase requirement, and promote the object of backlight illumination.Further, combined by the LED of different in width aluminium base and different capacity, fundamentally solve in the LED application of big or middle power, between total light flux and temperature rise, be difficult to the technical problem reaching better balance.That is, by aluminium base is set to difform structure, and by the LED of different capacity, different encapsulation, different luminous flux, according to the mode of cross arrangement, aluminium base (PCB) in conjunction with different in width is combined into backlight module lamp bar, thus realize maximum luminance, temperature rise minimizes, and finally reaches the moderate object of backlight illumination, with promote user comfortableness experience.
As previously mentioned, in an lcd, the total light flux of backlight module lamp bar is directly proportional to the brightness of LCD linear relationship, and the general power of backlight module lamp bar becomes to be similar to proportional relation with temperature rise.In practical application, under the printed circuit board (PCB) of designed use has enough installing spaces to hold usually, need the light emitting diode installed.In the embodiment of the present invention, backlight module lamp bar comprises printed circuit board (PCB), at least two kinds of different types of light emitting diodes.Wherein, at least two kinds of different types of light emitting diodes are arranged alternately on a printed circuit, and the luminous flux of described at least two kinds of different types of light emitting diodes is not identical with power.In order to meet designed brightness and temperature increase requirement, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and the summation of power equal total light flux needed for backlight module lamp bar and general power respectively.
Alternatively, the installing space such as length of the printed circuit board (PCB) of lamp bar inadequate to hold various light emitting diode when, during the quantity of at least two kinds of different types of light emitting diodes and each Light-Emitting Diode described in selection, except based on the total light flux needed for described backlight module lamp bar and general power, also select the concrete quantity of different types of light emitting diode and each light emitting diode according to the length that described printed circuit board (PCB) can be arranged light emitting diode quantity.
Preferably, at least two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode.
Fig. 2 is the structural representation of the backlight module lamp bar of one embodiment of the present of invention.See Fig. 2, this backlight module lamp article comprises a LED201, printed circuit board (PCB) (PCB, Printed Circuit Board) 202 and the 2nd LED203.In embodiment illustrated in fig. 2, a LED201 and the 2nd LED203 is two kinds of different types of light emitting diodes, and described different types of light emitting diode has different luminous fluxes and power.Wherein, two kinds of different types of light emitting diodes are arranged alternately on the printed circuit board.
For the backlight module lamp bar such as arranged in an lcd, the total light flux needed for it and general power are always known in advance.On the other hand, because general power becomes linear approximate relationship with temperature rise, meet the requirement of general power, also just substantially meet temperature increase requirement; Meet the requirement of total light flux, also just meet the requirement of brightness.Therefore, of the present invention embodiment illustrated in fig. 2 in, based on required total light flux and general power, select the quantity of two kinds of different types of light emitting diodes and corresponding Light-Emitting Diode, make the summation of luminous flux of selected different types of light emitting diode and the summation of power equal required total light flux and general power.
It will be understood by those skilled in the art that as replacement, backlight module lamp bar also can comprise more than three kinds or four kinds different types of light emitting diodes.No matter adopt how many kinds of light emitting diode, the luminous flux sum of selected various light emitting diodes and power sum all need to equal respectively required total light flux and general power.
In embodiment shown in Fig. 2, a LED201 evenly encapsulates, is contained in the PCB202 of horizontal positioned;
In the embodiment of the present invention, the quantity of a LED201 is one or more, and the power of each LED201 is identical.
2nd LED203 evenly encapsulates, is contained in the PCB202 of horizontal positioned, and the power of a LED201 and luminous flux are greater than power and the luminous flux of the 2nd LED203;
In the embodiment of the present invention, similar to a LED201, the quantity of the 2nd LED203 is one or more, and the power of each 2nd LED203 is identical.
In practical application, the quantity of a LED201 can be identical with the quantity of the 2nd LED203, also can be different.
Preferably, the power of a LED201 is 0.6w, and corresponding luminous flux is 58 lumens (lm), then the power of the 2nd LED203 is 0.4w, and corresponding luminous flux is 34lm; Certainly, in practical application, the power of a LED201 also can be set to 1w, and corresponding luminous flux is 78lm, then the power of the 2nd LED203 can be set to 0.4w, also can be set to 0.6w.
One LED201 and the 2nd LED203 cross arrangement on PCB202, a LED201 of cross arrangement and the 2nd LED203 forms line source;
PCB202 offers the up and down penetrating open slot 204 corresponding with the 2nd LED203, the center of open slot 204 and the 2nd LED203 are centrally located at the same face.
In the embodiment of the present invention, if the direction of cross arrangement the one LED201 and the 2nd LED203 is horizontal direction, the length of corresponding PCB202, direction vertical with cross arrangement direction on horizontal plane is fore-and-aft direction, the width of corresponding PCB202, the direction of an accommodating LED201 is the thickness of vertical direction, corresponding PCB202.
PCB202 is on the direction (fore-and-aft direction) vertical with the direction (vertical direction) of an accommodating LED201, offer open slot 204, open slot 204 is corresponding 2nd LED203 in the longitudinal direction, namely in the longitudinal direction, the PCB width (fore-and-aft direction) of accommodating 2nd LED203 is less than the PCB width of an accommodating LED201.Like this, by adopting the LED cross arrangement of different capacity, form line source, the total light flux that the LED of cross arrangement is produced meets the requirements, and the LED larger to power adopts the PCB that radiator portion is larger, the LED that power is little adopts the PCB that radiator portion is less, namely reduces PCB width, can reach the balance and stability of backlight module lamp bar LED temperature rise with this.
Preferably, the length of open slot 204 and width can be determined according to the power of the power of the spacing between a LED201 and the 2nd LED203, a LED201 and the 2nd LED203.In practical application, also method by experiment can determine length and the width of open slot 204, make when meeting total light flux value, temperature rise maintains in rational regional extent.That is, the area that power ratio and the LED of LED surround is directly proportional, and the LED larger to power adopts the PCB that radiator portion is larger, and to lower-powered LED, reduce the PCB width of radiator portion, thus contribute to the balance and stability reaching lamp bar LED temperature rise further.
Like this, of the present invention embodiment illustrated in fig. 2 in, according to the spatial accommodation (such as length) printed circuit board (PCB) can being placed LED, mode alternately the high-capacity LED of respective numbers and low-power LED is taked to arrange, the optics Long-term change trend that the strong difference of LED light that not only can solve different capacity is brought, and the temperature rise of lamp bar can be made to control within zone of reasonableness, final realization is when identical drive current, the overall luminous flux of lamp bar is increased, backlight module lamp bar is reached between total light flux and temperature rise preferably balance, make LCD brightness moderate, improve the display effect of LCD, reach the balance of the bar brightness of backlight module lamp and temperature rise demand.
Preferably, one LED201 and the 3rd LED203 both sides are provided with jump ring, in the PCB202 of an accommodating LED201 and the 2nd LED203, both sides are provided with the bayonet socket for fixing jump ring, jump ring is embedded in bayonet socket, in the hole that LED can be made to fix in the pcb, like this, when LED damages, can take out in the hole PCB and carry out changing, facilitate the replacing of LED and structure is comparatively simple.
During the present invention is embodiment illustrated in fig. 2, according to required total logical light quantity, general power, choose a LED201 and the 2nd LED203 of respective numbers.Such as, the mode of the one LED201 and the 2nd LED203 cross arrangement on PCB202 can be that each LED201 sequentially intersects with each the 2nd LED203, namely after arranging a LED201, then the 2nd LED203 is arranged, and then arrange a LED201, circulation like this, namely the quantity of the first and second LED is identical; Also can be that a multiple LED201 sequentially intersects with one the 2nd LED203, namely after a multiple LED201 sequential, then one the 2nd LED203 is arranged, and then by a multiple LED201 sequential, circulation like this, namely the number of a LED201 is the corresponding multiple of the number of the 2nd LED203; Also can be that a LED201 sequentially intersects with multiple 2nd LED203, namely after a LED201 arrangement, then multiple 2nd LED203 of sequential, and then arrange a LED201, circulation like this, namely the number of the 2nd LED203 is the corresponding multiple of the number of a LED201; Can also be that a multiple LED201 sequentially intersects with multiple 2nd LED203, namely after a multiple LED201 sequential, then multiple 2nd LED203 of sequential, and then by a multiple LED201 sequential, circulation like this, namely the number of a LED201 is neither the corresponding multiple of number of the 2nd LED203, also not identical.Certainly, in practical application, the cross arrangement of alternate manner also can be adopted.
As replacement, as previously mentioned, when the space of the printed circuit board (PCB) of diode installed is less, except the total light flux needed for needing to consider and the factor of general power, also need the space size of the printed circuit board (PCB) considering diode installed, to make selected various light emitting diodes while meeting total logical light quantity and total power requirements, all light emitting diodes can be installed on a printed circuit.In this case, the concrete quantity of the first and second selected LED and corresponding arrangement mode just just meet a part of assembled arrangement mode in the various assembled arrangement modes of the light emitting diode of the requirement of total light flux and general power.If the light emitting diode of three kinds or more, the kind quantity of the light emitting diode so can selected and the number of different types of light emitting diode and assembled arrangement mode are also a part of assembled arrangement modes in the various assembled arrangement modes of the light emitting diode that can meet total light flux and total power requirements.
Fig. 3 is another structural representation of the backlight module lamp bar of example embodiment of the present invention.See Fig. 3, one LED201 and the 2nd LED203 mode of cross arrangement on PCB202 are that every two LED201 sequentially intersect with every two the 2nd LED203, namely after two LED201 sequential, then sequential two the 2nd LED203, and then by two LED201 sequential, so circulate.The power of the one LED201 is comparatively large, and adopt the PCB that radiator portion is larger, the power of the 2nd LED203 is relatively little, adopts the PCB that radiator portion is less.
From above-mentioned, the backlight module lamp bar of the embodiment shown in Fig. 3, a LED evenly encapsulates, is contained in the PCB of horizontal positioned; 2nd LED evenly encapsulates, is contained in the PCB of horizontal positioned, and the power of a LED is greater than the power of the 2nd LED; By by a LED and the 2nd LED cross arrangement on PCB, and a LED of cross arrangement and the 2nd LED is made to form line source; Meanwhile, PCB offers the up and down penetrating open slot corresponding with the 2nd LED, the center of open slot and the 2nd LED are centrally located at the same face.Like this, the LED of different capacity is carried out cross arrangement on PCB, and adjust the radiating surface of LED on PCB of different capacity, the radiating surface at great power LED place is made to be greater than the radiating surface at low-power LED place, make total light flux can meet LCD display needed for luminous flux threshold value, the LED of different capacity can be made again rationally to dispel the heat, thus control temperature rise in rational scope, avoid that the total light flux that evenly distributed low-power LED causes is less, temperature rise is less, LCD brightness is inadequate, the situation that display effect is poor; It also avoid that the total light flux that evenly distributed middle great power LED causes is comparatively large, temperature rise is higher, LCD brightness is stronger, display effect or poor situation, reach between total light flux and temperature rise and preferably balance, thus realize maximum luminance, temperature rise minimizes, and finally reaches the moderate object of backlight illumination, improve user comfortableness experience, improve the reliability of backlight module lamp bar simultaneously, improve light utilization efficiency.
Fig. 4 is the light-emitting diode arrangement method flow schematic diagram based on backlight module lamp bar of the embodiment of the present invention.See Fig. 4, first, in step 400, based on the total light flux needed for backlight module lamp bar and general power, select the quantity of at least two kinds of different types of light emitting diodes and each light emitting diode, make the luminous flux sum of all light emitting diodes and power sum equal required total light flux and general power respectively, the luminous flux of wherein said two kinds of different types of light emitting diodes is not identical with power.Exemplarily, select two kinds of different types of LED, i.e. the first and second LED and corresponding quantity thereof.Alternatively, if the such as limited length system of the installing space on printed circuit board (PCB), then from meet required total light flux and general power light emitting diode various combinations choose the combination of light emitting diode kind and the corresponding LED quantity being suitable for arranging LED in limited installation space.For ease of illustrating, to choose a two kinds of different types of LED i.e. LED and the 2nd LED during following step describes.
Next, be arranged alternately on a printed circuit described at least two kinds of different types of light emitting diodes.
Particularly:
Step 401, offers the up and down penetrating open slot corresponding with the 2nd LED in advance on PCB, and the center of described open slot and described 2nd LED are centrally located at the same face;
In this step, the length of open slot and width can be determined according to the power of the power of the spacing between a LED and the 2nd LED, a LED and the 2nd LED.In practical application, also method by experiment can determine length and the width of open slot, make when meeting total light flux value, temperature rise maintains in rational regional extent.
Step 402, evenly encapsulates a LED, is contained in the PCB of horizontal positioned;
Wherein, the quantity of a LED is multiple, and the power of each LED is identical.
Step 403, evenly encapsulates the 2nd LED, is contained in the PCB of horizontal positioned, and the power of a LED and luminous flux are greater than power and the luminous flux of the 2nd LED;
Wherein, the quantity of the 2nd LED is multiple, and the power of each 2nd LED is identical.
Step 404, a LED and the 2nd LED cross arrangement on PCB, a LED of cross arrangement and the 2nd LED forms line source.
In this step, the mode of a LED and the 2nd LED cross arrangement on PCB can be that each LED sequentially intersects with each the 2nd LED; Also can be that a multiple LED sequentially intersects with the 2nd LED; Also can be that a multiple LED sequentially intersects with multiple 2nd LED.Certainly, in practical application, the cross arrangement of alternate manner also can be adopted.
Preferably, the method comprises further:
Arrange jump ring at a LED and the 2nd LED both sides in advance, in the PCB202 of an accommodating LED201 and the 2nd LED203, the bayonet socket for fixing jump ring is established in both sides.
In this step, by jump ring is embedded in bayonet socket, in the hole open slot that corresponding LED can be made to be fixed in the PCB202 of an accommodating LED201 and the 2nd LED203, like this, when LED damages, can take out from the hole of accommodating LED and carry out changing, facilitate the replacing of LED and structure is comparatively simple.
With instantiation, backlight module lamp bar of the present invention is described again below.
The temperature rise threshold value corresponding to required general power supposing backlight module lamp bar is 70 degree, and the luminance index that required total light flux determines requires at least to reach 330 nits (nit).Obviously, selected Light-Emitting Diode needs ensureing will guarantee that temperature rise is no more than 70 degree while brightness is not less than 330 nits.In the difference of each example following realizes, identical drive current is used to the driving of LED light emitting diode.
For 40 cun of backlight module lamp bars, LED lamp bar adopts of the prior art evenly distributed:
If the LED lamp bar of row 0.4w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 22.4w, and corresponding temperature rise is 40 degree; The luminous flux sum of each LED lamp bar is 34lm, and corresponding brightness is 240nit, thus, meets temperature rise index request, but does not meet luminance index requirement;
If the LED lamp bar of row 1w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 56w, and corresponding temperature rise is 80 degree; The luminous flux sum of each LED lamp bar is 78lm, and corresponding brightness is 420nit, thus, meets luminance index requirement, does not meet temperature rise index request;
If the LED lamp bar of row 0.6w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 33.6w, and corresponding temperature rise is 50 degree; The luminous flux sum of each LED lamp bar is 58lm, and corresponding brightness is 298nit, thus, meets temperature rise index request, does not meet luminance index requirement;
And according to technical scheme of the present invention, linear relationship is approximated to according to power and temperature rise, luminous flux is directly proportional to brightness the feature of linear relationship, selects the LED of LED and 28 1w of 28 0.6w, and the LED lamp bar of 0.6w and the LED lamp bar of 1w is alternately arranged at equal intervals.Now, the total quantity of the LED lamp bar of arrangement is still 56, can meet the installing space of PCB, and the power sum of each LED lamp bar is 44.8w, and corresponding temperature rise is 64 degree; The luminous flux sum of each LED lamp bar is 64lm, and corresponding brightness is 340nit, thus meets temperature rise threshold requirement and luminance index requirement.
According to the present invention, three kinds of different types of light emitting diodes can also be chosen.Such as, select the LED of 18 0.4w, the LED of LED and 19 1w of 19 0.6w, and the LED lamp bar of the LED lamp bar of 0.4w, the LED lamp bar of 0.6w and 1w is alternately arranged successively at equal intervals.Now, the total quantity of the LED lamp bar of arrangement is still 56, can meet the installing space of PCB, and the power sum of each LED lamp bar is 37.6w, and corresponding temperature rise is 60 degree; The luminous flux sum of each LED lamp bar is 62lm, and corresponding brightness is 330nit, thus meets temperature rise threshold requirement and luminance index requirement.
Again such as, for 32 cun of backlight module lamp bars, LED lamp bar adopts existing evenly distributed,
If the LED lamp bar of row 0.4w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 12w, and corresponding temperature rise is 37 degree; The luminous flux sum of each LED lamp bar is 34lm, and corresponding brightness is 180nit, thus, meets temperature rise index request, does not meet luminance index requirement;
If the LED lamp bar of row 1w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 30w, and corresponding temperature rise is 78 degree; The luminous flux sum of each LED lamp bar is 78lm, and corresponding brightness is 430nit, thus, meets luminance index requirement, does not meet temperature rise index request;
If the LED lamp bar of row 0.6w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 18w, and corresponding temperature rise is 43 degree; The luminous flux sum of each LED lamp bar is 58lm, and corresponding brightness is 310nit, thus, meets temperature rise index request, does not meet luminance index requirement;
Adopt the embodiment of the present invention, according to required brightness and temperature rise threshold requirement, namely according to required total light flux and total power requirements, consider the actual spatial accommodation of backlight module lamp bar, select the LED lamp bar of 15 0.6w and the LED lamp bar of 15 1w, and the LED lamp bar of the LED lamp bar of 0.6w and 1w is carried out interval be alternately arranged.Now, the total quantity of the LED lamp bar of arrangement is 30, still meets the requirements of installation space of PCB; The power sum of each LED lamp bar is 24w, and corresponding temperature rise is 62.4 degree; The luminous flux sum of each LED lamp bar is 62lm, and corresponding brightness is 344nit, meets temperature rise threshold requirement and luminance index requirement.
According to the present invention, three kinds of different types of light emitting diodes can also be chosen.Such as, select the LED of 10 0.4w, the LED of LED and 10 1w of 10 0.6w, and the LED lamp bar of the LED lamp bar of 0.4w, the LED lamp bar of 0.6w and 1w is alternately arranged successively at equal intervals.Now, the total quantity of the LED lamp bar of arrangement is still 30, can meet the installing space of PCB, and the power sum of each LED lamp bar is 20w, and corresponding temperature rise is 56 degree; The luminous flux sum of each LED lamp bar is 59lm, and corresponding brightness is 331nit, meets temperature rise threshold requirement and meets luminance index requirement simultaneously.
The backlight module lamp bar utilizing the embodiment of the present invention to provide and the light-emitting diode arrangement method based on backlight module lamp bar, can obtain following technique effect:
1, the present invention adopts the combination of the LED light emitting diode of different capacity, can provide the design of multiple backlight module lamp bar, can design the distinctiveness product of different brightness and temperature rise demand;
2, the present invention adopts the combination of the LED light emitting diode of different capacity, solve backlight module lamp bar of the prior art all adopt in power LED light emitting diode time, the problem that brightness does not meet design requirement, improve display brightness, optimize display effect;
3, the present invention adopts the combination of the LED light emitting diode of different capacity, solve backlight module lamp bar of the prior art when all adopting high-capacity LED light emitting diode, the too high problem not meeting design requirement and reduce lamp bar temperature, extend LED lamp bar service life of temperature rise;
4, the present invention adopts the combination of the LED light emitting diode of different capacity, and solve backlight module lamp bar of the prior art when all adopting high-capacity LED light emitting diode, temperature is too high, and LED deflection efficiency can be brought to reduce, and produces the problems such as black field speck.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention also comprises these change and modification.
Claims (10)
1. a backlight module lamp bar, is characterized in that, this backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and described at least two kinds of different types of light emitting diodes have different luminous fluxes and power, wherein,
Described at least two kinds of different types of light emitting diodes are arranged alternately on the printed circuit board,
The summation of the luminous flux of described at least two kinds of different types of light emitting diodes and the summation of power equal required total light flux and general power respectively;
Described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode;
Described printed circuit board (PCB) offers the up and down penetrating open slot corresponding with the second light emitting diode, the center of open slot and the second light emitting diode be centrally located at the same face.
2. backlight module lamp bar according to claim 1, is characterized in that,
First light emitting diode and the second light emitting diode evenly encapsulate respectively, are contained in the described printed circuit board (PCB) of horizontal positioned.
3. backlight module lamp bar according to claim 2, is characterized in that, comprise further:
Jump ring is set at the first light emitting diode and the second light emitting diode both sides, the bayonet socket being used for fixing described jump ring is set in the printed circuit board (PCB) both sides of accommodating first light emitting diode and the second light emitting diode.
4. backlight module lamp bar according to claim 3, is characterized in that, the quantity of the first light emitting diode or the second light emitting diode is one or more.
5. backlight module lamp bar according to claim 4, is characterized in that,
Each first light emitting diode sequentially intersects with each second light emitting diode, cross arrangement on a printed circuit; Or
Multiple first light emitting diode sequentially intersects with second light emitting diode, cross arrangement on a printed circuit; Or
First light emitting diode sequentially intersects with multiple second light emitting diode, cross arrangement on a printed circuit; Or
Multiple first light emitting diode sequentially intersects with multiple second light emitting diode, cross arrangement on a printed circuit.
6. based on a light-emitting diode arrangement method for backlight module lamp bar, described backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and the method comprises:
Based on the total light flux needed for described backlight module lamp bar and general power, select different luminous flux and at least two kinds of variety classes light emitting diodes corresponding to power, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and power summation equal required total light flux and general power respectively;
Described at least two kinds of different types of light emitting diodes are arranged alternately on a printed circuit;
Wherein, described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode;
The luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode;
Offer the up and down penetrating open slot corresponding with the second light emitting diode on the printed circuit board, the center of open slot and the second light emitting diode be centrally located at the same face.
7. method according to claim 6, wherein,
First light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned;
Second light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned.
8. method according to claim 6, comprises further:
In advance jump ring is set at the first light emitting diode and the second light emitting diode both sides, establishes the bayonet socket for fixing described jump ring in the printed circuit board (PCB) both sides of accommodating first light emitting diode and the second light emitting diode.
9. method according to claim 8, wherein, the mode be arranged alternately described in comprises: each first light emitting diode and each second light emitting diode sequentially intersect, multiple first light emitting diode sequentially intersects with second light emitting diode, first light emitting diode sequentially intersects with multiple second light emitting diode and multiple first light emitting diode sequentially intersects with multiple second light emitting diode.
10. method according to claim 9, wherein, the length of described open slot and width are determined according to the power of the spacing between the first light emitting diode and the second light emitting diode, the first light emitting diode and the power of the second light emitting diode.
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| CN201310023660.7A CN103062668B (en) | 2012-08-29 | 2013-01-22 | Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip |
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| CN103225788B (en) * | 2013-04-27 | 2016-03-23 | 华南理工大学 | Improve method and the LED light source thereof of LED light source |
| CN104949004A (en) * | 2015-06-12 | 2015-09-30 | 武汉华星光电技术有限公司 | Mobile phone backlight source |
| CN106205508A (en) * | 2016-09-22 | 2016-12-07 | 昆山龙腾光电有限公司 | Backlight adjusting method and backlight adjusting means for liquid crystal indicator |
| CN107153301A (en) * | 2017-06-21 | 2017-09-12 | 北京小米移动软件有限公司 | Backlight module, display module and electronic equipment |
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| JP2008117594A (en) * | 2006-11-02 | 2008-05-22 | Harison Toshiba Lighting Corp | Backlight device |
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